Jaycar Speedo Corrector

[SpudRider]

One of our newest forum members, JTHSpace, discovered a very nice, small, reasonably priced, speedometer corrector manufactured in Australia. :tup: The JayCar Speedo Corrector is 2.5" x 1.8" x 1" in dimensions, and has a shipping weight of only 3.5 ounces. :) Here is a link to the product shown at the vendor's website in the United States.

http://www.jaycar.us/productView.asp?ID=AA0376

Here is a link to the product's user manual.

http://www.jaycar.co.uk/products_uploaded/User%20Manual%20AA0376.pdf

If you purchase ten or more units, the price is only $23.00 USD, plus shipping. :tup: Is anyone in the United States interested in a group purchase of this speedometer corrector? If so, I am willing to handle the details. :)

http://www.jaycar.co.uk/products_uploaded/productLarge2_17622.jpg

[SpudRider]

This speedometer corrector was originally available as a kit.

http://www.autospeed.com/cms/article.html?&A=108415

http://us1.webpublications.com.au/static/images/articles/i1084/108415_6mg.jpg

http://www.4wdaction.com.au/forum/viewtopic.php?f=10&t=141776

http://i1115.photobucket.com/albums/k543/bill_clarke1/Hilux/Speedo%20Corrector/IMAG1456_zpsaeca2563.jpg

However, you can now buy the completed unit, which is smaller, and you don't need to do any soldering. ;)

[SpudRider]

The Jaycar Speedo Corrector is wired into the RX3 the same way as the SpeedoDRD unit from 12oClockLabs.

http://i442.photobucket.com/albums/qq146/spudrider/Zongshen%20RX3/SpeedoDRD%20setup_zpsf2rgg0bd.png

The RX3 employs a sending unit on the front wheel which uses has three wires. One wire contains 12V DC, which powers the sending unit. The other wire is a ground wire. The third wire transmits pulses from the sending unit to the Siemen's speedometer. ;)

http://i442.photobucket.com/albums/qq146/spudrider/Zongshen%20RX3/DSCF3582_zpsjytjbdbz.jpg (http://s442.photobucket.com/user/spudrider/media/Zongshen%20RX3/DSCF3582_zpsjytjbdbz.jpg.html)

We would tap into the three wires on the opposite side of the connector, at the wires that lead to the speedometer.

http://i442.photobucket.com/albums/qq146/spudrider/Zongshen%20RX3/Jaycar%20wiring%20diagram_zps6ydnatmt.png (http://s442.photobucket.com/user/spudrider/media/Zongshen%20RX3/Jaycar%20wiring%20diagram_zps6ydnatmt.png.html)

One wire feeds 12V DC to the speedo corrector, and one wire feeds the ground connection. One wire feeds input from the RX3 sending unit to the Jaycar unit. One wire feeds the corrected signal from the Jaycar unit to the speedometer. :tup:

The Jaycar unit has convenient holes in the housing, so we could attach the unit under the dashboard with zip ties. :)

[SpudRider]

Tapping into the wires on the dashboard side of the connector will allow us to easily and quickly replace the stock sending unit if it becomes damaged. ;)

Setting the S1 and S2 potentiometers allows you to fine tune the Jaycar speedometer corrector for excellent accuracy, allowing you to change tires, wheel sizes, et cetera, and still obtain a very accurate speedometer reading. :)

[G19Tony]

I was interested, up until it said not to get the module wet. I'll pass on this one. Thanks for sharing it. :tup:

[woodlandsprite]

I was interested, up until it said not to get the module wet.

*sigh* Tony, your post made me heave a big sigh - it was looking so promising until that part about getting wet! LOL

[Veteran]

Spud,
I'd be interested in 3 of them. If you decide to do a group buy, let me know what your Paypal is or how else you'd prefer payment.
EC

[SpudRider]

I don't think it would be that hard to waterproof the case. Also, one could mount this unit under the pillion saddle, and extend the wiring to the dashboard. :) However, I do appreciate your concerns. ;)

[SpudRider]

Spud,
I'd be interested in 3 of them. If you decide to do a group buy, let me know what your Paypal is or how else you'd prefer payment.
EC

Duly noted, Veteran. The next cheapest alternative is the SpeedoDRD from 12oClockLabs for $70, and I think this unit is much better protected, and much easier to calibrate. :)

[oldqwerty]

Spud,
I'd be interested in 3 of them. If you decide to do a group buy, let me know what your Paypal is or how else you'd prefer payment.
EC

No doubt a sailor in today's Navy knows how to keep electronics dry. Please share when you have a chance to set yours up. I plan an aluminum box cut from a solid chunk, with cooling fins if necessary, and a waterproof bulkhead plug for wires. Overkill? Of course, but more than enough means never having to say spizz-zzzit.

SpudRider, what do you figure delivered in the U. S. of A. is going to cost?

[SpudRider]

No doubt a sailor in today's Navy knows how to keep electronics dry. Please share when you have a chance to set yours up. I plan an aluminum box cut from a solid chunk, with cooling fins if necessary, and a waterproof bulkhead plug for wires. Overkill? Of course, but more than enough means never having to say spizz-zzzit.

SpudRider, what do you figure delivered in the U. S. of A. is going to cost?

I'm sure both you, and Veteran can hermetically seal this unit. :tup:

I sent an email to the vendor, but I don't expect a reply until Monday. ;) The shipping weight for each unit is only 3.5 ounces, so I think the individual shipping cost on ten, or more units should be pretty reasonable. :) Then, of course, one would need to add the cost of shipping each unit to the individual buyers. However, the SpeedoDRD unit costs $70, and I'm sure the final, delivered cost of this item will be much less than that. :tup: I would guess the final, delivered cost of this unit would be $35, or less.

[SpudRider]

If Qwerty wants one of these controllers, we are already half way to the minimum order of ten units. :) Of course, the more we order, the better, since the individual cost of shipping each unit from Australia drops as the number of units increases. ;)

[SpudRider]

I pretty certain applying some RTV around the wiring grommets and the case seam will seal this unit very well. Plus, I think the unit will be very well protected, even while washing the motorcycle, if it is located under the dashboard, behind the windshield. Of course, mounting the unit under the pillion saddle will provide even more protection from moisture. :)

[3banger]

I'm in.

Have we ever confirmed how this will also effect the odometer? I know it sounds like an obvious yes. But on my Triumph Sprint ST the speedo reads 5% fast confirmed with GPS but odometer is almost dead-on with GPS data. The speedo error is therefor programmed in on purpose.

[SpudRider]

I'm in.

Have we ever confirmed how this will also effect the odometer? I know it sounds like an obvious yes. But on my Triumph Sprint ST the speedo reads 5% fast confirmed with GPS but odometer is almost dead-on with GPS data. The speedo error is therefor programmed in on purpose.

Thank you. :)

I think the only way to know is to ride a measured mile, and compare the reading on the odometer. ;)

I have compared my speedometer to my Garmin GPS receiver, and the speedometer is definitely a little over 10 percent 'optimistic.'

[oldqwerty]

I'm sure both you, and Veteran can hermetically seal this unit. :tup:

I sent an email to the vendor, but I don't expect a reply until Monday. ;) The shipping weight for each unit is only 3.5 ounces, so I think the individual shipping cost on ten, or more units should be pretty reasonable. :) Then, of course, one would need to add the cost of shipping each unit to the individual buyers. However, the SpeedoDRD unit costs $70, and I'm sure the final, delivered cost of this item will be much less than that. :tup: I would guess the final, delivered cost of this unit would be $35, or less.

I'm in at 35 delivered.

Given enough of the right kind of sealant, anything can be waterproofed. Watch these Jeeps hit Sippy Hole and imagine what it takes to waterproof a Jeep ignition.

https://www.youtube.com/watch?v=wzl96PuST7M

[SpudRider]

That makes the total at least six; I might get two. ;)

I don't plan to make any money on this venture. As soon as I get a firm price from the vendor, I will post the delivered cost per unit to the United States. At that time I will accept payment via PayPal before I order the units.

After the units arrive, I will determine the domestic shipping cost via first class mail from the U.S. Postal Service. Then I will ship the units out individually as I receive payment via PayPal for the domestic shipping cost. I might add one dollar per unit to help cover my fuel expenses traveling back and forth to the post office. I don't want to lose money on this deal. ;)

[fishman10]

I'm in too ,Spud!

[SpudRider]

Good for you, Fish. :)

[SpudRider]

Of course, if the price isn't significantly more expensive making an individual order, I will let you know. I will only arrange a group buy if the cost per unit is significantly better than ordering the units individually. ;)

[SpudRider]

I'm in.

Have we ever confirmed how this will also effect the odometer? I know it sounds like an obvious yes. But on my Triumph Sprint ST the speedo reads 5% fast confirmed with GPS but odometer is almost dead-on with GPS data. The speedo error is therefor programmed in on purpose.

I just completed a 12-mile ride across town for groceries. I mounted my Garmin GPS receiver, and recorded the odometer setting. Then I zeroed the trip odometer on the RX3 before departing.

I don't know the accuracy of a GPS odometer. :shrug: However, here are the results.

Trip distance recorded by Garmin GPS receiver: 12.1 miles
Trip distance recorded by Zongshen RX3 odometer: 12.8 miles

My Garmin GPS receiver records hundredths of a mile, while the RX3 odometer only records tenths of a mile. Therefore, I don't know how close the stock odometer was to reaching 12.9 miles. However, using the most conservative estimate of 12.80 miles, I performed the following calculations.

12.8 miles minus 12.1 miles = 0.7 miles 'optimistic' on the odometer

(0.7 miles divided by 12.1 miles) x 100 = 6 percent 'optimistic'

Using the same, Garmin GPS receiver for comparison, the stock speedometer is running over 10 percent 'optimistic.'

[SpudRider]

As for myself, I would rather have speedometer accuracy over odometer accuracy. However, everyone must make his own decision regarding this matter. ;) Of course, one could set the Jaycar Speedo Corrector somewhere in the middle, and he would have a 5 percent 'optimistic' speedometer, and a perfectly accurate odometer. :)

Of course, I am assuming my measurements are correct. I heartily encourage others to complete the same experiments, and report their results. :)

[Veteran]

Duly noted, Veteran. The next cheapest alternative is the SpeedoDRD from 12oClockLabs for $70, and I think this unit is much better protected, and much easier to calibrate. :)

Maybe a sailor should pay more attention to detail; I didn't see where it said not to get it wet. While I appreciate the vote of confidence in my ability to waterproof this thing; now that I know it's a water-sensitive item, I think I'm going to have to retract my request to be put on the list for them. I can live with thinking I'm faster than I am if it's not fairly bulletproof out of the box.
Sorry Spud, and sorry for the double post; I haven't a clue how that happened.

[SpudRider]

No problem, Veteran. I understand your concern, and you are off the list. :)

Incidentally, I don't see a double post. However, if I do find it, I can delete it for you. ;)

[SpudRider]

I am going to send another email to the vendor of the Jaycar Speedo Corrector, and ask him if the caveat regarding moisture is a CYA (cover your backside) 'warning,' or if the unit is truly susceptible to water damage. ;)

[woodlandsprite]

I am going to send another email to the vendor of the Jaycar Speedo Corrector, and ask him if the caveat regarding moisture is a CYA (cover your backside) 'warning,' or if the unit is truly susceptible to water damage. ;)

Thanks for doing that spud! It would definitely be more desirable if there isn't a significant moisture concern

[SpudRider]

Thanks for doing that spud! It would definitely be more desirable if there isn't a significant moisture concern

You're welcome. :)

I just sent another email to Jaycar. Here is the content of the email. I will post his reply as soon as I receive it. ;)

Dear Sir,

I am attempting to put together a group purchase of your Jarcar Speedo Correctors from the United States. However, several people have expressed concerns regarding your statement in the User Manual which says, "never get any part of the module wet." Is this unit water resistant, or is it easily damaged by moisture? Can it be used reliably for motorcycle installations? Thank you.

[Huck369]

I'm in for the group buy.....

[SpudRider]

Thanks, Huck. :) We're half way there; I will probably get two. ;)

[jimjr21]

I am in for 2 minimum. Have to talk to the other local owners. Maybe 4.

[Weldangrind]

Of course, one could set the Jaycar Speedo Corrector somewhere in the middle, and he would have a 5 percent 'optimistic' speedometer, and a perfectly accurate odometer. :)


I'm betting that a tire change to a different aspect ratio would result in nearly a 5% difference.

[Weldangrind]

I don't think it would be that hard to waterproof the case. Also, one could mount this unit under the pillion saddle, and extend the wiring to the dashboard. :) However, I do appreciate your concerns. ;)

This would be my approach: http://en.wikipedia.org/wiki/Self-amalgamating_tape

[G19Tony]

You're welcome. :)

I just sent another email to Jaycar. Here is the content of the email. I will post his reply as soon as I receive it. ;)

Dear Sir,

I am attempting to put together a group purchase of your Jarcar Speedo Correctors from the United States. However, several people have expressed concerns regarding your statement in the User Manual which says, "never get any part of the module wet." Is this unit water resistant, or is it easily damaged by moisture? Can it be used reliably for motorcycle installations? Thank you.

Thanks, Spud. Looking forward to his reply. :tup:

[Weldangrind]

Overkill? Of course, but more than enough means never having to say spizz-zzzit.

I'm going to use that line at work.

:lmao:

[SpudRider]

I am in for 2 minimum. Have to talk to the other local owners. Maybe 4.

Thanks, Jim. :)

[SpudRider]

I'm betting that a tire change to a different aspect ratio would result in nearly a 5% difference.

Indeed, that's why it's nice to be able to calibrate the speedometer/odometer if you change tires, or the tread wears down on knobby tires, et cetera. :) I am starting to think it might be advantageous to locate the Jaycar Speedo Corrector under the pillion saddle, near the ECU. This area is not only protected from moisture, but it allows easy access to the unit whenever you want to make an adjustment. :tup:

Adjusting the Jaycar unit is as simple as turning one, or both of the potentiometers, and you can do that with the screwdriver in the tool kit, which is stored under the pillion saddle. :tup: In contrast, adjusting the SpeedoDRD is more involved, and that speedo corrector costs $70. :wtf:

https://www.youtube.com/watch?v=iScrjr7FxDM

[oldqwerty]

All electronics will succumb rapidly to getting wet. Waterproofing electronics is very easy. Silicone bathtub caulk does a fine job. Heck, all those billions of old school small block Chevy engines out there have been running since 1954 with the intake manifold ends sealed with gorilla snot of one form or another. Permgasket makes a half dozen products that will work. 3m makes maybe 1.2 billion different products that will work.

[SpudRider]

This would be my approach: http://en.wikipedia.org/wiki/Self-amalgamating_tape

As always, thanks for the great tip, Weld. :)

You can buy the Scotch brand of that tape at Lowes. :)

http://www.lowes.com/pd_158594-98-2242_0__?productId=3127861

https://www.youtube.com/watch?v=fJPOYCDH8wE

[SpudRider]

It's Monday morning in Australia, so I hope I get a reply from the vendor today. :) I think this unit is an excellent value. :tup: I'm sure it would cost me more to make one of these units myself than the price the vendor is charging. ;)

[SpudRider]

All electronics will succumb rapidly to getting wet. Waterproofing electronics is very easy. Silicone bathtub caulk does a fine job. Heck, all those billions of old school small block Chevy engines out there have been running since 1954 with the intake manifold ends sealed with gorilla snot of one form or another. Permgasket makes a half dozen products that will work. 3m makes maybe 1.2 billion different products that will work.

I really like the Permatex Black RTV; I use it all the time to seal the rocker cover gaskets on my two Hondas. :tup:

http://www.walmart.com/ip/Permatex-Ultra-Black-Hi-Temp-RTV-Silicone-Gasket-Maker/16777009

http://i5.walmartimages.com/dfw/dce07b8c-803e/k2-_da6d7efb-2161-46a5-84ba-26e48ca51c0c.v1.jpg

[ArExThree]

If this unit is as user friendly as stated and is available at the estimated price...Sign me up for one. I agree that the waterproofing issue should be a minor fix. Thanks for investigating this option for all RX3 owners!

[SpudRider]

If this unit is as user friendly as stated and is available at the estimated price...Sign me up for one. I agree that the waterproofing issue should be a minor fix. Thanks for investigating this option for all RX3 owners!

Thanks for you kind words. :) You are added to the list. ;)

[oldqwerty]

It's Monday morning in Australia, so I hope I get a reply from the vendor today. :) I think this unit is an excellent value. :tup: I'm sure it would cost me more to make one of these units myself than the price the vendor is charging. ;)

Last reverse engineering of electronics I did was a heat controller for reptiles. Cheapest source was $39 plus shipping. Home built was $7-8 dollars when bought in lots of 10.

I really like the Permatex Black RTV; I use it all the time to seal the rocker cover gaskets on my two Hondas. :tup:

http://www.walmart.com/ip/Permatex-Ultra-Black-Hi-Temp-RTV-Silicone-Gasket-Maker/16777009

http://i5.walmartimages.com/dfw/dce07b8c-803e/k2-_da6d7efb-2161-46a5-84ba-26e48ca51c0c.v1.jpg

Definitely overkill, but you already have it on hand, so good choice for you.

[Weldangrind]

Definitely overkill, but you already have it on hand, so good choice for you.

Agreed. You'd probably be happy with Permatex clear, which is a little easier to remove if needed. It begins the curing process in 15 minutes, and cures fully in 24 hours. Good stuff.

[jimjr21]

The very best way to find your roll out is what I call the oil spot method.

On a clean surface put a single drop of oil (any liquid will do) on your front tire. Roll bike straight and upright to put tow linear marks on the ground. Measure distance from front edge to front edge. This will be your true roll out including any flex in the tire carcass.

Use this measurement to input for speed calculations.

[Adjuster]

The very best way to find your roll out is what I call the oil spot method.

On a clean surface put a single drop of oil (any liquid will do) on your front tire. Roll bike straight and upright to put tow linear marks on the ground. Measure distance from front edge to front edge. This will be your true roll out including any flex in the tire carcass.

Use this measurement to input for speed calculations.


Very clever.


/

[SpudRider]

The very best way to find your roll out is what I call the oil spot method.

On a clean surface put a single drop of oil (any liquid will do) on your front tire. Roll bike straight and upright to put tow linear marks on the ground. Measure distance from front edge to front edge. This will be your true roll out including any flex in the tire carcass.

Use this measurement to input for speed calculations.

That is the calibration method prescribed by the user's manual for my Trail Tech Vapor computer. :) I sat on the bike while I rolled three revolutions of the front wheel along a crack in the pavement. Then I measured the roll out distance, and divided by three. ;)

[Adjuster]

Thats also very clever going for the average.


/

[SpudRider]

Unfortunately, the two speedo correctors I have examined are not calibrated using wheel roll out. ;) However, this is exactly the method you use to calibrate the speedometer for the Trail Tech computers. :)

[Pliskin]

Spud please check your inbox.

[SpudRider]

Spud please check your inbox.

I read your personal message, and sent a new email to the address you provided. :) Thank you very much for helping me contact this company. :thanks:

[SpudRider]

Thanks to the assistance of our fellow Zongite, Pliskin, I just got a reply from Jaycar regarding the price of their Speedo Correctors. :tup:

When ordering ten or more of the units, the price for each Speedo Corrector is $23 USD. The shipping cost via DHL is $60 for a 5-day delivery to my address. Therefore, the cost of each unit, delivered to Idaho, is $29 USD. I will charge an extra dollar per unit to help cover my fuel costs driving to the local post office. ;)

Therefore, the cost for each unit will be $30 USD, plus the actual shipping/packaging costs to send the unit to your home address. I'm getting two units, so I believe the current count is a commitment for 8 units. Once we get two more buyers, I might as well start collecting the money so we can order the units. :)

[SpudRider]

Incidentally, I didn't get a reply to my question regarding the water resistance of the units. Therefore, I sent another email, and repeated the question. ;) I will post the reply after I receive it. :)

[Pliskin]

I read your personal message, and sent a new email to the address you provided. :) Thank you very much for helping me contact this company. :thanks:

I am glad I could be of assistance. :tup:

[No1Vic]

Just got one of these from Jaycar Australia, when I get a dry afternoon will see if it works ..... Get annoyed with the RX3 speedo being so out!

[SpudRider]

Just got one of these from Jaycar Australia, when I get a dry afternoon will see if it works ..... Get annoyed with the RX3 speedo being so out!

That's great. :) Please do share your review of this product when you have time. Can you post some photographs of the unit now? How do you like the quality of manufacture? If I may ask, how much did Jaycar charge you to ship one unit to England?

[No1Vic]

I paid £14.50 for the unit with £5 delivery and added £2.50 for insurance....Only took 10 days to arrive. Item looks rugged enough and shouldn't be too difficult to make water resistant... seal the case two halves and plug the screw heads and led hole job done.

[Adjuster]

I know what its supposed to do, I don't know how it does it, but it sure looks complicated. LOL


/

[SpudRider]

I paid £14.50 for the unit with £5 delivery and added £2.50 for insurance....Only took 10 days to arrive. Item looks rugged enough and shouldn't be too difficult to make water resistant... seal the case two halves and plug the screw heads and led hole job done.

Thanks for posting the excellent photos. :) That is a well-built unit. I agree, I don't think waterproofing that unit will be the least bit difficult. ;) If you install the unit, please consider posting a thread on the subject, and/or reporting the jumper settings which work for the Zongshen RX3. :)

[SpudRider]

I have sent another email to Jaycar asking if there is a less expensive shipping option to the United States than DHL. I have also asked for the least expensive shipping cost for sending one unit to the United States. :)

[No1Vic]

No worries, I'll take pics and show which wire goes where when I fit it. Think I will be tapping into the speedo sensor wiring side of the plug to the instrument cluster and tuck the unit behind the headlight.... before I start anyone else know what wire does what from the sensor, looking at the wiring diagram Green is earth, then Brown/White and Black/Red unknown from the diagram but both go to the instrument cluster.

[SpudRider]

When you are under the dashboard, I suggest you unplug the speedometer from the sending unit. Then turn on the ignition key, and probe the speedometer plug with a digital multimeter to determine which of the two wires in question sends 12V DC to ground. ;)

[No1Vic]

Had the voltmeter out and pulled the sensor plug off, black and red was at 12v while the brown and white was a lower voltage so going to assume that's the signal wire, might get some one to spin the front wheel and watch the voltage to be sure tomorrow.
Right after further testing and the speedo sensor wiring on my RX3 is
12V : Black/Red
Signal (8v that drops as the wheel is turned) : Brown/White
Ground : Green

[SpudRider]

I agree; it sounds like the black/red wire is the 12V DC wire. ;) The wiring for this corrector couldn't be simpler. :tup: Hook up one pair of wires to 12V DC and ground. On the other side of the box, cut the brown/white wire which transmits the signal from the speedometer sending unit. Connect this wire from the sending unit into the box, and connect the wire from the Speedo Corrector to the speedometer. :)

http://www.chinariders.net/attachment.php?attachmentid=2690&stc=1&d=1432042547

http://i442.photobucket.com/albums/qq146/spudrider/Zongshen%20RX3/SpeedoDRD%20setup_zpsf2rgg0bd.png

I really like the quality of manufacture for this Jaycar Speedo Corrector. :) I think this unit represents an excellent value. :tup:

[SpudRider]

Will this unit fit under the pillion saddle? I wonder if placing this unit under the pillion saddle will make it either difficult, or impossible to install the pillion saddle? :shrug:

I could make a mock up with the same dimensions, and test the fitment, but there is no mock up which will test as well as using the real item. ;) Vic, would you mind testing the fitment of the Jaycar Speedo Corrector under the pillion saddle? :)

[No1Vic]

It would easily fit, here's its actual dimensions 64mm x 46mm x 25mm I have my bikes alarm siren fitted under the pillion seat which is larger than that.

[No1Vic]

Just a thought, as anyone on here had the actual speedo instrument unit apart, any jumper connections or 'secret' reset buttons on the circuit board? Can't believe Zongshen have factory set every unit for a 21" front wheel......

[SpudRider]

If you take it apart, I think you will be first. ;)

[SpudRider]

It would easily fit, here's its actual dimensions 64mm x 46mm x 25mm I have my bikes alarm siren fitted under the pillion seat which is larger than that.

Thanks for the verification; that is good to know. :)

I think I am going to mount my Jaycar Speedo Corrector under the pillion saddle. I can tap power controlled by the ignition from the flasher relay, tail light, et cetera, and I can always find a convenient earth ground. Then I only need to run a pair of wires to the dashboard; extension cord wire is fine for that purpose, and inexpensive. ;) Placed under the saddle, the Jaycar unit will be easily accessible for calibration, whenever I choose, and it will also be located in a dry environment. In addition, space under the dashboard is crowded, and the installation will be much easier, and quicker, by placing the Jaycar unit under the saddle. :)

[oldqwerty]

I don't see anything trick in the Jaycar pic. Any components under the circuit board? The hardest part of reverse engineering what I see might be finding the correct triac, but I'm pretty sure I have some that will work from some homemade anemometer projects.

[SpudRider]

I don't see anything trick in the Jaycar pic. Any components under the circuit board? The hardest part of reverse engineering what I see might be finding the correct triac, but I'm pretty sure I have some that will work from some homemade anemometer projects.

I think they did a nice job, but I don't think there is anything 'trick' about the design. ;) Follow the links on post #2 of this thread, and you will find a circuit design based on a $10 chip. ;)

[SpudRider]

Okay; I finally figured out the Jaycar website. ;)

You can have the Jaycar Speedo Corrector shipped directly to your home in the United States for a price of $29.00 for the unit, plus $7.50 shipping, for a total cost of $36.50. The estimated delivery time is 5-10 days. The potential group purchase is not significantly less expensive, or faster, than ordering the unit for yourself. Therefore, the potential group purchase is cancelled. I just placed an individual order for one of the Jaycar speedo correctors, myself. ;)

If you wish to order one of these units, go the the Jaycar website for prices in U.S. Dollars, located at the link below.

http://www.jaycar.us/productResults.asp?w=speedo+corrector&keyform=KEYWORD&SUBMIT=Search

So far, I have not received a reply regarding the water resistance of the unit. If I do receive a reply, I will post it on this thread. If you want to order one or more of these units, but you can't figure out the website, let me know, and I will post a tutorial thread on the topic. :)

[No1Vic]

Oh dear..... fitted it and nothing.... followed the instructions, test run for 5 mins so see if the LED would flash to indicate its receiving a signal it can understand but no joy :-( Swapped the jumper from 8v2 to 5v setting and tried again....no luck. Tried the other jumpers same result. Maybe I've got a duff unit or it's not compatible with our speed senders...... Looks like fitting a 21" front wheel instead.

[SpudRider]

Oh dear..... fitted it and nothing.... followed the instructions, test run for 5 mins so see if the LED would flash to indicate its receiving a signal it can understand but no joy :-( Swapped the jumper from 8v2 to 5v setting and tried again....no luck. Tried the other jumpers same result. Maybe I've got a duff unit or it's not compatible with our speed senders...... Looks like fitting a 21" front wheel instead.

Thank you for informing us of the problem. I appreciate your willingness to test the unit, and your promptness in letting us know it isn't working. ;)

[No1Vic]

The only thing I didn't try was reversing the sensor in/out connection, I've ordered a VDO M3 cycle computer now to provide an accurate speedometer..... ways and means to the same end I suppose.

[SpudRider]

Thanks to you, I saved some money, Vic. :tup: I cancelled my order for the Jaycar Speedo Corrector. ;)

Instead, I 'bit the bullet,' and ordered the SpeedoDRD from 12 O'clock Labs. It ending up costing $33.50 more than the Jaycar unit, but I got a money back guarantee if it does not work with the Zongshen RX3. :) The SpeedoDRD unit should be here within a week, and I will post a new thread on that unit after I get it installed. ;)

[No1Vic]

No worries Spud, that's one each lol, your review of the LED headlight saved me wasting my cash too. I've ordered an Osram Silverstar 2.0 H4 bulb instead to replace the standard 35w bulb. Should give a decent spread and range of light :-)

[AZRider]

I've also decided not to purchase a Speedo healer. At my age, with dementia on the horizon, I need to exercise my brain as much as possible. Calculating a 10% speed reduction every time I look at the speedo will help in that effort. :lmao:

[SpudRider]

:lol:

[Weldangrind]

I've also decided not to purchase a Speedo healer. At my age, with dementia on the horizon, I need to exercise my brain as much as possible. Calculating a 10% speed reduction every time I look at the speedo will help in that effort. :lmao:

We learned that trick in Canada in the '70's, because all of the speedometers were in MPH when we converted to Metric. Multiplying by 0.6 became second nature.

[SpudRider]

We learned that trick in Canada in the '70's, because all of the speedometers were in MPH when we converted to Metric. Multiplying by 0.6 became second nature.

I've been following that procedure for 7 years with my Zongshen Sierra, as well. The odometer records miles, but the speedometer is labeled for both kph and mph. However, the mph marks are so small, I just multiply the kph reading by 0.6. ;)

[SpudRider]

Nevertheless, I think the wonderful Siemens dashboard of the Zongshen RX3 deserves a speedometer corrector, so I purchased one. :tup:

[Weldangrind]

Just a thought, as anyone on here had the actual speedo instrument unit apart, any jumper connections or 'secret' reset buttons on the circuit board? Can't believe Zongshen have factory set every unit for a 21" front wheel......

I keep coming back to this comment.

[SpudRider]

I keep coming back to this comment.

I would love to have someone disassemble the speedometer and experiment with it. :) However, I don't want to ruin mine. ;)

:lol:

[pete]

I use one of these on the XT660R ===> http://www.google.co.nz/url?sa=t&rct=j&q=&esrc=s&frm=1&source=web&cd=1&cad=rja&uact=8&ved=0CB0QFjAA&url=http%3A%2F%2Fwww.healtech-electronics.com%2Fproducts%2Fsh%2F&ei=vNVeVZGEOseC8gXfsoHoCg&usg=AFQjCNG_NgiBxR3r9Zk5xisE481g1duMqA&sig2=et5XlfJNkXuDNYB1bM-oMg&bvm=bv.93990622,d.dGc
work great..easy to set up & made
for motorbikes..

[Weldangrind]

I would love to have someone disassemble the speedometer and experiment with it. :) However, I don't want to ruin mine. ;)

:lol:


How much are they on TB?

[SpudRider]

How much are they on TB?

I haven't checked. However, I'm sure they cost most than I want to spend as long as I have a good one, with a 2-year warranty. ;)

:hehe:

[SpudRider]

I purchased, and installed a SpeedoDRD from 12 O'Clock Labs on my Zongshen RX3. If you like, you can read my installation thread at the following link. ;)

http://www.chinariders.net/showthread.php?p=186052#post186052

[kohburn]

would one work on the TT250 or is that a mechanical speedo?

[SpudRider]

The CSC TT250 has a mechanical sending unit for the speedometer.

https://www.cscmotorcycles.com/v/vspfiles/assets/images/TT250_FrontWheel10.jpg

[kohburn]

figures - just have to do that mental math

[Tranberg]

Im OK with analog speedometers being optimistic, but ever since I installed my first bicycle computer on a motorcycle more than 25 years ago, my brain can only accept a speed displayed as a number as the true speed within the margin of error achievable by the calibration technique.

I calibrated the bicycle computer to be accurate within +/- 2.5 meters on 1000 meters, by using T-shaped marks on the highway exactly 1000 meters apart, which were there for the highway police to calibrate their equipment.

My current scooter has a speedometer with 2" tall digits and like all Suzuki's it was 10% optimistic, before the SpeedoHealer. Now it never differs more than 1 kph from my GPS.

It's such a pleasure to be able to be speeding exactly 3 kph below the threshold for speeding tickets, without doing math on the fly.

If it has a digital speedo, corect it.
If it has a mechanical speedo, get a digital device which tells you the true speed.

[Weldangrind]

Fair statements.


Are you Canadian?

[Tranberg]

I'm a Dane, living in Denmark, over in Europe.

[kohburn]

If it has a mechanical speedo, get a digital device which tells you the true speed.

that will most likely happen because I feel lost without a tachometer and will probably add a digital dashboard display.

[NzBrakelathes]

This seems to have lost traction with folks?

[calvarez]

I wasn't aware of this option, and already installed the Speedo DRD.

[NzBrakelathes]

I wasn't aware of this option, and already installed the Speedo DRD.

What did that cost?

I was looking online here for something to make plug n play - a little expensive tho.


http://shop.12oclocklabs.com/index.php?route=product/product&product_id=59

Ok i found it - pricey wee fella

[calvarez]

$70 shipped on eBay.

[NzBrakelathes]

Might look at this and offering it :)
I’m always on the look out for ideas and so on :)
I’d be making it with the plugs ready to just plug and play etc

Ok all done - check links if interested (also can just be a universal unit for other applications)

http://chinariders.net/attachment.php?attachmentid=15124&stc=1&d=1544944577

http://chinariders.net/showthread.php?p=296163#post296163