Jaycar Speedo Corrector

[Weldangrind]

Originally Posted by SpudRider

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]

Originally Posted by 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.

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

[G19Tony]

Originally Posted by SpudRider

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.

[Weldangrind]

Originally Posted by oldqwerty

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

I'm going to use that line at work.

[SpudRider]

Originally Posted by jimjr21

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

Thanks, Jim.

[SpudRider]

Originally Posted by Weldangrind

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.

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. In contrast, adjusting the SpeedoDRD is more involved, and that speedo corrector costs $70.

[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]

Originally Posted by Weldangrind

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_158594-98-22...ductId=3127861

[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. I'm sure it would cost me more to make one of these units myself than the price the vendor is charging.

[SpudRider]

Originally Posted by 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.

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

http://www.walmart.com/ip/Permatex-U...Maker/16777009

[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]

Originally Posted by 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!

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

[oldqwerty]

Originally Posted by 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. 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.

Originally Posted by SpudRider

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

http://www.walmart.com/ip/Permatex-U...Maker/16777009

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

[Weldangrind]

Originally Posted by oldqwerty

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.