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#1 |
Join Date: Nov 2007
Location: Tejas
Posts: 834
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HiBird 250 sprockets
Stock gearing is 16 front and 46 back, which means gear ratio is 2.875. I want a gear ratio of 2.5 for highway, like JTF259.17 and JT269.43. Do y'all think a 17 up front would clear?
edit: The clearance between the 16-tooth with chain and the engine case is about 4mm. ![]()
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Chinabikeless |
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#2 |
Couldn't tell without the chain on, but it looks like a 17 would be ok.
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#3 |
Join Date: Nov 2007
Location: Tejas
Posts: 834
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Where can I find a JTF259.17? I've tried bikebandit, jcwhiteney, and denniskirk without luck.
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Chinabikeless |
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#4 |
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I have all of soberday to satur up!! |
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#5 | |
Join Date: Nov 2007
Location: Tejas
Posts: 834
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Quote:
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Chinabikeless |
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#6 |
You can call them and get a 17(more than likely). I had to call them and get a 43 tooth for the rear of my GY-5 because they didn't have it listed on the website.
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I have all of soberday to satur up!! |
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#7 |
Join Date: Nov 2007
Location: Tejas
Posts: 834
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The clearance between the 16-tooth sprocket with chain and the engine case is only about 4mm. If I install a 17-tooth, will I have to grind off some of the engine case?
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Chinabikeless |
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#8 |
Join Date: Apr 2009
Posts: 10
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a 17 wont clear without grinding a lot but i put a 40t on the rear and dropped about 1000 rpms and it runs great.it will cruise at 80 on the factory speedo, about 70mph acsual. mine is all stock with a 110 main jet. im gutting the pipe, installind an crf250 silencer, a clamp on uni filter and jetting up to a 115. ill keep yall posted. 8)
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#9 |
Join Date: Nov 2007
Location: Tejas
Posts: 834
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The plastic pad on the swing-arm wears out quickly with stock sprockets (16 front, 46 rear). I'm afraid if I use smaller rear sprocket, the pad will wear out even faster.
Hey willy, is the Hibird rear sprocket the same as Lifan's?
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Chinabikeless |
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#10 |
Join Date: Apr 2009
Posts: 10
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i dont know dragon, i just called that eternal journey guy on here and he knew just what i needed and had a good bit of knowledge of the bikes. 8)
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#11 |
Join Date: Apr 2009
Posts: 10
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hey dragon i just remembered he said if it had 4 bolts holding it to the hub they were the same. 8)
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#12 |
Join Date: Feb 2008
Location: Terrell and Grapevine Tx.
Posts: 1,585
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Yep, its the same.
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#13 |
Join Date: Nov 2007
Location: Tejas
Posts: 834
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I'm confused by the different posts about the front 520 sprocket size. Some say use jtf-328; other say use jtf-1324. The two are very similar, within 1mm. I took my countersprocket off my bike and measured it with my plastic ruler. I'm not skilled enough for it to know which sprocket is a better fit. To y'all Lifan guys out there, which is the better fit front sprocket, jtf-328 or jtf-1324?
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Chinabikeless |
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#14 |
Join Date: May 2007
Location: Altamont, Kansas
Posts: 15,103
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The jtf 328 will not fit the lifan counter shaft. I found this out, but trying the one that came on the xr200r on the lifan engine.
So you need to use the 1324 one. I will be ordering one to let you know how it fits. Allen
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