Bashan BS250Gy-9 "WIll" sprocket questons

[andyj812]

Hello everybody again, I posted here this winter and everybody was very helpful. I need some help with my "Will" on changing the rear sprocket. I looked at some of the other threads and haven't found one that has enough information. I apologize if I haven't if its there and I have over looked it. My bike has plenty of throttle left in fifth gear at 35 mph(gps) 40 speedometer but rpms go up quickly from their and I'm constantly trying to shift up. The bike will do 56 (gps) 70 by speedometer but is really revved up at that point. It came stock with a 17t front sprocket and a 56t rear sprocket with a 428 chain. I would like to gear this down or up as much as possible without having to ride the clutch too much on take off. This bike will see overwhelmingly just street use and my never see trail.

[andyj812]

pic of Ken Sean mirrors recommended by Spudrider.

[andyj812]

pics of rear sprocket (the white is chain lube the comes out white and then drys)

[andyj812]

side view of bike kickstand seems a little long, would like to bike not be so upright when on stand. Left plastic on seat to protect seat, it seems to be wearing well lol

[Adjuster]

Man your bike looks clean. There are some great guys on here that will help you with your sprocket.


/

[Adjuster]

I am curious as to what the purpose of that ring is on your sprocket.


/

[andyj812]

I am curious as to what the purpose of that ring is on your sprocket.


/

I'm not sure but I think I saw in another thread it was some kind of chain catcher should the bike throw the chain, It s cleans because its hasn't been rode much and it was in back of the truck and got rained on the other day. just got it tagged the other day. it has 101 km on now, 56 km today the rest just in the yard.

[katoranger]

I would get a 44-46T rear sprocket. It appears to be the common China bike sprocket.

Amazon has them. The picture is just a stock photo. Take a look at the drawing and compare to yours.

I always use a 1980 Honda XL185S for fitment.

45 Tooth
http://www.amazon.com/JT-Sprockets-JTR269-45-Steel-Sprocket/dp/B0068O5W3M/ref=au_as_r?_encoding=UTF8&Make=Honda%7C59&Model=XL185S%7C20475&Year=1980%7C1980&ie=UTF8&n=15684181&newVehicle=1&s=automotive&vehicleId=2&vehicleType=motorcycle

44 Tooth
http://www.amazon.com/JT-Sprockets-JTR269-44-Steel-Sprocket/dp/B0068OC744

[SpudRider]

That is an attractive motorcycle, and the Ken Sean mirrors look great on it. :)

[Weldangrind]

Nice looking bike. Either follow Kato's links, or hit eBay.

[dossbag]

Hi, Check out this (http://www.chinariders.net/showthread.php?t=13928) thread.. If it's the same as your set up.. then look here (http://www.chinariders.net/showthread.php?t=14682&page=2) And you should find what you want. :)

[Carangajeira]

http://www.amazon.com/JT-Sprockets-JTR269-45-Steel-Sprocket/dp/B0068O5W3M/ref=au_as_r?_encoding=UTF8&Make=Honda%7C59&Model=XL185S%7C20475&Year=1980%7C1980&ie=UTF8&n=15684181&newVehicle=1&s=automotive&vehicleId=2&vehicleType=motorcycle

44 Tooth
http://www.amazon.com/JT-Sprockets-JTR269-44-Steel-Sprocket/dp/B0068OC744

I admit to not being very savvy mechanically but those Amazon sprockets (for Honda 185) appear to have 6 mounting holes set wide out, where the picture shows 4 close in?? This is the problem I had with my Ronco when the only sprocket they sold had the 6 wide set holes, and they cut and welded my old sprocket! It appears that many of the Chinese bikes have used the Honda sprocket configuration, but Ronco and Bashan (probably among others) use a different - not so widely available - format!

[katoranger]

I admit to not being very savvy mechanically but those Amazon sprockets (for Honda 185) appear to have 6 mounting holes set wide out, where the picture shows 4 close in?? This is the problem I had with my Ronco when the only sprocket they sold had the 6 wide set holes, and they cut and welded my old sprocket! It appears that many of the Chinese bikes have used the Honda sprocket configuration, but Ronco and Bashan (probably among others) use a different - not so widely available - format!

The 6 hole sprocket is just a stock photo. The drawing shows the correct pattern for the JTR269.45 sprocket with 4 bolt holes.

Dossbag linked to the same amazon listing and he actually has one on his Will.

[Carangajeira]

Ah, I see Katoranger! I am trying to get my rear sprocket replaced - back to 38T and original part, but having a hard time here finding one! Would order one online, too, but postal services to here are unreliable and take so long - I only have 3 months left before I go back to Brazil, and it is worse there!!!

[andyj812]

Thanks Katoranger and Dossbag and everybody else for your help and comments. I ordered the 44t sprocket from Amazon as suggested and a new chain. It should be here Friday but not sure if I will be able to install until next week but I will keep you updated, thanks again

[dossbag]

I look forward to hearing you results :)

[andyj812]

New sprocket and chain supposed to be delivered tomorrow. I rode 151 km today (as read by speedometer). Towards the end of the ride the speedometer started bouncing. When I arrived back home I did a little troubleshooting and noticed the lower front wheel side of the cable was a little loose and tightened it. Did another 20 minute ride and seemed to fix to the problem. If speedometer issue comes back I might see if I can find a reasonable new "Dash" speedometer with a magnetic pickup and tach on ebay. almost time for next oil change, may due that while I have bike on stand to replace sprocket.

[andyj812]

These were delivered today, I love Amazon Prime. Came in just before I left for work, hope to find some time tonight when after I get off to install if not maybe tomorrow but probably next week sometime, I'll keep you updated.

[Weldangrind]

That JT will last a long time. I'm looking forward to hearing about how the new ratio works for you.

[andyj812]

That JT will last a long time. I'm looking forward to hearing about how the new ratio works for you.

Thanks for everybody's help and input. I stayed up until 5 this morning installing the new sprocket and chain. (I don't get home from work until after 1 AM) My snap ring pliers are to small and would not spread the snap ring out far enough so it took me quite a while to get the snap ring back on with a pair of needle nose pliers pulling the handle apart in order to spread the ring but I finally got it. It was raining when I got done but took it for a short ride. low end it runs great not fishing or for gears anymore. After I got up to day I took it for a 15 mile ride before work. I don't have any more speed but rpms are but sounds and feels a lot better to ride. I think 44 tooth sprocket I ordered was to much though. I didn't get any noticeable speed increase but top speed is now in forth gear. It runs fine in fifth gear but the is 15 km reduction is speed over 4th gear as read by speedometer. I'm going to do some research and possibly put a 16 or 15 tooth in the front rather than fight that snap ring again. If I replace the front gear I may not have to take anymore links out of the new chain either and would definitely have to add links or get another new chain to change to rear. I don't think I'm going to get anymore top speed out of it but might as well lower the gearing in case I do off road it. I appreciate all the help everybody has giving me and anymore input is welcome and appreciated. :thanks::thanks::thanks::thanks::thanks:

[andyj812]

Pictures of old and new sprockets together for comparison

[andyj812]

Looking at the sprocket calculator point out to me by Dossbag my original setup of 17-56 had a ratio of 3.29.

My new and current 17-44 ratio is 2.59

if I change the front to: 16-44 the ratio 2.75
15-44 2.93
14-44 3.14
13-44 3.38


since the 13 tooth (3.38) is close to my original ration and my current ration is 2.59 in the middle would be 15-44 or 2.93.

What is your opinion should I order the 15 tooth sprocket?

[Adjuster]

The front sprockets are so inexpensive and easy to change do what I did and get 3 sprockets in the range you are looking for. The size you want, one size smaller and one size bigger. Actually I think I wanted a 15 so I got a 15, 16 and 17. The 17 turned out was the best for me and the largest I can fit. They were only $9 each included shipping.


/

[andyj812]

The front sprockets are so inexpensive and easy to change do what I did and get 3 sprockets in the range you are looking for. The size you want, one size smaller and one size bigger. Actually I think I wanted a 15 so I got a 15, 16 and 17. The 17 turned out was the best for me and the largest I can fit. They were only $9 each included shipping.


/

I thought about buying the 16 and 15 as you suggested but I'm cheap lol so was trying to figure out which one was the best. but on further inspection, my chain is way to close to my swing arm with my small rear sprocket, putting a smaller front sprocket on will only make it closer so I'm going to order a new rear sprocket and another chain.

Stopped at Harbor Freight today and picked up a bigger snap ring plier set. Only the best Chinese made tools for my china bike. lol

here are pics of my current setup for some reason they up loaded sideways.

[Adjuster]

Cant tell on your bike but some bikes the chain runs on a nylon/plastic type slider mounted to the swing arm.


/

[SpudRider]

I own two Zongshen motorcycles. I love Harbor Freight. :D

A Chinese motorcycle deserves Chinese tools. :lol:

[andyj812]

I own two Zongshen motorcycles. I love Harbor Freight. :D

A Chinese motorcycle deserves Chinese tools. :lol:


I was looking at digital speedometers the other day and the were all from China. I kept telling myself I don't want a Chinese speedometer. Then I laughed when I remembered its a Chinese bike.

[andyj812]

Cant tell on your bike but some bikes the chain runs on a nylon/plastic type slider mounted to the swing arm.


/

If you look close in the pictures you can see a rubber swing arm protecter(?) where the chain is actually touching right now. Can see where chain has dug into it a little. I notice it was close when I adjusted the chain but I get some tight on bottom loose on top after adjusting the chain and riding. I order a new JT chain and front and rear sprocket so all should match and elimate this I hope. I noticed there was a slight difference in my old 428 and chain and the new 428 JT chain that was delivered the other day. apparently 428 is different from brand to brand.

[dossbag]

I used my GPS to test mine today.. It was running at 61 - 63 mph, I think the 45 it's a tad slower than the 50.. My original instinct was to go for a 47 I might drop the front a notch and see what it does. Can't even remember what the original is now? No panic though. anything over 60 will keep me at normal traffic speeds. And there are always other mods to do. I just wish I had more time and $$ But living in Michigan, you get 6 months to do everything before the ice moves in... heaven forbid!!
Interesting stuff though.. thanks for the updates. :)

[andyj812]

I used my GPS to test mine today.. It was running at 61 - 63 mph, I think the 45 it's a tad slower than the 50.. My original instinct was to go for a 47 I might drop the front a notch and see what it does. Can't even remember what the original is now? No panic though. anything over 60 will keep me at normal traffic speeds. And there are always other mods to do. I just wish I had more time and $$ But living in Michigan, you get 6 months to do everything before the ice moves in... heaven forbid!!
Interesting stuff though.. thanks for the updates. :)

I appreciate the input. I went with the 50 this time. The original was a 56 and I put on a 44 so 50 is exactly in the middle. If I still don't like it ill know which way to go. Indiana weather about the same and its rained almost every day for the last 2 weeks here. Are you currently running a 17 or 16 front sprocket? I was using some of the posts on your bike as I guideline and assuming you had a 16 front. A 17-48 combo has a similar ratio to a 16-45 and I saw you post about thinking about a 47. A 17-50 and and 16-47 have the same ratio.

[andyj812]

The chain and sprockets not due to be delivered until tomorrow so today I changed the oil and adjusted the valves. I installed some Led accent lights but the didn't turn out well.

[dossbag]

still not checked the front sprocket yet...
Got a laptop that wont fix (ordered 4th motherboard)
Rebuilt an XJ900 (from boxes) was a couple of days away and the starter clutch failed.. urghh So.. Order parts, remove engine, split cases.. Funny how stuff I torqued down correctly last week, is now 5,000 times harder to remove?

Can't really see the light show on your bike I'm afraid.. you might wanna resize your pics a little lol There are some free online ones.

My speedo is a joke too.. It was reading 70 when my GPS was showing 62
:lmao:

[andyj812]

still not checked the front sprocket yet...
Got a laptop that wont fix (ordered 4th motherboard)
Rebuilt an XJ900 (from boxes) was a couple of days away and the starter clutch failed.. urghh So.. Order parts, remove engine, split cases.. Funny how stuff I torqued down correctly last week, is now 5,000 times harder to remove?

Can't really see the light show on your bike I'm afraid.. you might wanna resize your pics a little lol There are some free online ones.

My speedo is a joke too.. It was reading 70 when my GPS was showing 62
:lmao:

I'm not very good with pics still figuring them out lol. The light show looks better not on cam but still not the effect I was going far. not bright enough although you can see the individual LEDs through the plastic in places. 62? I'm jealous I haven't made it to 60 by GPS yet. maybe with this mod but doubting it.

[andyj812]

Received and installed the new sprockets and chain today. I got lucky and the new chain was exactly the right length so I didn't have remove any links. Took it for a ride around the yard but couldn't get it on the road because I was with my 9 year old daughter. Probably be this weekend before I can test it on the road. I installed a JT front and rear sprocket and JT chain and it so for no more top of the chain tight bottom of the chain loose again. I couldn't tell any difference between the original front sprocket and the new one though.

[andyj812]

pics of the old and new sprockets together for comparison. I couldn't see any difference in the new front 17t and the old 17t when I put them on top of each other.

[andyj812]

pic of my bike on harbor freight stand

[Weldangrind]

I have a very similar stand, from Princess Auto in Canada.

[andyj812]

I have a very similar stand, from Princess Auto in Canada.

I like the stand a lot, its very stable and sturdy sometimes when you get buy something from Harbor Frieght it can be hit or miss but I highly recommend this stand, I think I paid around $25 for it on sale.

[andyj812]

Finally got to test out the new 17T-50T combination. Seems to work out pretty good a little low in 1rst but not extremely high rpms in 5th. Top speed is now 58 mph (gps) a gain of 2 miles per hour. Still not the 65 motobuys advertised but better and probably would be closer if lost some weight. Thank you everybody for the help and advise. speedomet must be breaking in because although still reading high it's not reading as high as it was. I'll post updates as the miles go up. I might remove the air box and try a pod filter.

[Weldangrind]

Does the battery reside in the same box as the air filter?

[andyj812]

Does the battery reside in the same box as the air filter?

No the battery is under the seat just after the air box

[Weldangrind]

This is my favourite pod filter: http://www.ebay.com/itm/Red-42mm-Angled-Foam-Pod-Air-Filter-125cc-140cc-Pit-Dirt-Bike-GY6-150cc-Moped-/331264420940?hash=item4d20e5ec4c&vxp=mtr

[andyj812]

This is my favourite pod filter: http://www.ebay.com/itm/Red-42mm-Angled-Foam-Pod-Air-Filter-125cc-140cc-Pit-Dirt-Bike-GY6-150cc-Moped-/331264420940?hash=item4d20e5ec4c&vxp=mtr

Thankyou, I ordered this filter tonight, Do I need to oil it? If so, what do I use? I also ordered the Mikuni Carb that you suggested in the mikuni recommendation thread. I don't currently have a fuel filter should I order one or will that possibly just make my power loss issue worse if its a fuel flow issue?

[SpudRider]

Yes, you definitely need to apply oil to the air filter. Otherwise, you risk getting dirt in the combustion chamber, which will damage your intake valves. ;)

[andyj812]

Yes, you definitely need to apply oil to the air filter. Otherwise, you risk getting dirt in the combustion chamber, which will damage your intake valves. ;)

This is new to me, is there specific oil to use? I'm not sure if I'm gonne leave the pod filter on after I try it out, I have found a couple of public road creak crossings and some places to offroad so I may be off roading more than I thought. today when I went through the creek my feet and ankles of my pants got wet so if I do that more a pod may not be the best choice. But I am enjoying working on the bike almost as much as I am enjoying riding it. Ordeedr a mikuni carb today so I can play with jetting without messing up my stock carb.

[SpudRider]

Indeed, if you are going to frequently ride off road, the stock airbox is best. ;) Please post a photo of your current air filter. The shape of the filter has a big influence on the air filter oil I choose to employ. ;)

[Adjuster]

Thankyou, I ordered this filter tonight, Do I need to oil it? If so, what do I use? I also ordered the Mikuni Carb that you suggested in the mikuni recommendation thread. I don't currently have a fuel filter should I order one or will that possibly just make my power loss issue worse if its a fuel flow issue?

If you don't have a visible inline filter then you most likely have one on the backside of your tank petcock (or both). In fact you may want to pull your petcock and check that filter as a possible solution to your power problem. I don't know exactly which petcock you have but it will look similar to this one. The long straw tube is a plastic fuel filter.

http://www.ebay.com/itm/New-Gas-Fuel-Tank-Switch-Valve-Petcock-for-Honda-Rebel-250-CMX250-/252013172969?hash=item3aad27d8e9&vxp=mtr


/

[Weldangrind]

This is new to me, is there specific oil to use?

I use a light coating of Maxima Fab1 filter spray, which is available at most motorcycle shops. It's easy to see because it's blue, and it sticks like cobwebs.

[Weldangrind]

Indeed, if you are going to frequently ride off road, the stock airbox is best. ;) Please post a photo of your current air filter. The shape of the filter has a big influence on the air filter oil I choose to employ. ;)

Most of the hondoid airboxes are just awful. That's the reason I switch to a pod filter. I haven't had one get wet yet.

[Weldangrind]

If you don't have a visible inline filter then you most likely have one on the backside of your tank petcock (or both). In fact you may want to pull your petcock and check that filter as a possible solution to your power problem. I don't know exactly which petcock you have but it will look similar to this one. The long straw tube is a plastic fuel filter.

http://www.ebay.com/itm/New-Gas-Fuel-Tank-Switch-Valve-Petcock-for-Honda-Rebel-250-CMX250-/252013172969?hash=item3aad27d8e9&vxp=mtr

Excellent point. The petcock in the link above also has a sediment bowl, which requires periodic cleaning.

I always use an inline filter.

[SpudRider]

Most of the hondoid airboxes are just awful. That's the reason I switch to a pod filter. I haven't had one get wet yet.

Wow, I didn't know that. :ohno: Thanks for posting that information. ;) The air box on my Zongshen Sierra 200 is a virtual copy of the Yamaha TW200 air box, and it is excellent. :) I didn't know the Hondoid air boxes were so bad. :wtf:

[Weldangrind]

Not all of them are, but my Lifan airbox was terrible. The pod filter I linked to is an excellent solution, for $7.74.

[andyj812]

Indeed, if you are going to frequently ride off road, the stock airbox is best. ;) Please post a photo of your current air filter. The shape of the filter has a big influence on the air filter oil I choose to employ. ;)

here is pic of my filter and airbox with cover and filter removed

[andyj812]

2960Excellent point. The petcock in the link above also has a sediment bowl, which requires periodic cleaning.

I always use an inline filter.
I lightly bumped the bike and it fell against the lawnmower, dang kickstand is to long and the bike pretty much stands up straight up and down. no damage to the bike except it pulled the throttle cable out where it connects to the handle bar throttle. I had to pull the gas tank to remove the cable because the where the cable is goes it the carb is against the gas tank. It appears that I only have a black fuel line going to the petcock and the same style black fuel line from the petcock to the carb. Nothing that would appear to be a filter. I checked the valves while I had the tank off and they where at spec so not adjustment was need. I was able to get the cable to screw back into the throttle tightly.

[Weldangrind]

That's the same valve my honourary son bought for his girlfriend's bike; no sediment filter there. You need an inline filter, and it's also cheap insurance to upgrade the fuel line to something that is better quality. I got tired of running out, so I bought a big box of fuel line from Motion Pro.

[dossbag]

I put on a shorter shock and subsequently, I too have a kickstand that makes the bike sit pretty upright. I ground off the forward stopper for the stand so it goes further forward.. it works.. kinda, sorta, but I think I'll have to grind a slot in the stand, bend out a fraction, then weld up and paint over. Oh fun fun :)

[Weldangrind]

The welding part is fun. :D

[andyj812]

I put on a shorter shock and subsequently, I too have a kickstand that makes the bike sit pretty upright. I ground off the forward stopper for the stand so it goes further forward.. it works.. kinda, sorta, but I think I'll have to grind a slot in the stand, bend out a fraction, then weld up and paint over. Oh fun fun :)

I finally found the time to take my kickstand off and cut it down. I cut off and 1.5 inches which seem right when I lifted the kickstand 1.5 inches off the ground and tilted the bike over but now that its done 1" would have been beter. It works fine now and the bike will not accidently be bumped over. Had some orange spray paint laying around so I panted it orange after welding. Its muddy from a ride across the creek today.

[Adjuster]

Nice work.


/

[wilserchinarider]

Yea, Chinabikes and kickstands are a crap shoot at best. Of the four I recall, only the Lifan GY5 had a perfect length kickstand
Hawk 250, KS a little short, bike leans over hard, had to find a piece of cardboard recently when parking in a stone lot
Hi-bird kick stand is so long if the handlebars aren't turned left the bike is just about upright and a little breeze would knock it over.
Zong 200 kickstand a little short, not much.

[dossbag]

Yeah, you don't have to take a lot off. Even an inch can add quite a few degrees to the lean on a tall bike. Well done for getting on with it. I still tend to turn the bars and park on slopes lol