gearing

[rjdgriff]

i have a 98 banshee bored 10 over have toomey t5 exaust kn filter and durablu rear axle. i ride roads mostly but also like to hit the mud, fields and trails... i have a stock front sprocket and it dosnt quite have the pull i am looking for in the mud so my question is should i go with a 12 or 13 tooth front sprocket and how much difference will each one make/ thanks for your help

[toytech]

i have a 98 banshee bored 10 over have toomey t5 exaust kn filter and durablu rear axle. i ride roads mostly but also like to hit the mud, fields and trails... i have a stock front sprocket and it dosnt quite have the pull i am looking for in the mud so my question is should i go with a 12 or 13 tooth front sprocket and how much difference will each one make/ thanks for your help

 

welcome to bhq each tooth you go down on the front will make a noticable difference

[muggzy]

i have a 98 banshee bored 10 over have toomey t5 exaust kn filter and durablu rear axle. i ride roads mostly but also like to hit the mud, fields and trails... i have a stock front sprocket and it dosnt quite have the pull i am looking for in the mud so my question is should i go with a 12 or 13 tooth front sprocket and how much difference will each one make/ thanks for your help

 

 

Stock Gearing sprocket-sprocket is 14:40.

The mechanical advantage (MA) is 40/14 = 2.857

 

If you change to 13:40;

The MA = 40/13 = 3.076

 

3.077/2.857 = 1.077 or a 7.7% increase in torque at the rear axle. This also means 7.7% lower top-end speed and earlier, more frequent shifting

 

If you go with 12:40;

The MA is 40/12 = 3.333

 

3.333/2.857 = 1.167 or a 16.7% increase in torque and a corresponding loss of top-end speed compared with stock.

 

I'm running 13:41 (~10.4% increase in torque) and ride mostly woods with some steep, rocky trails and a little mud and I find the trade-off between power when I need it and frequent shifting is acceptable. But I'm new at this so the math stands - my opinion you should take with a grain of salt.

 

You can calculate your own set-up by substituting your numbers for the stock numbers and comparing as I did in the examples for your planned set-up. You'll have to use your experience and imagination from there :-)

[muggzy]

^ Oh! You'll notice a corresponding higher rate of wear on the front sprocket with each tooth less also. I went with a Moose 13T Chromalloy (sp?) on the front, a Sunstar 41T steal rear and a Marshall (9000lb) chain. That mud is like grinding paste so don't use aluminum, it's just too soft.

[locogato11283]

13 is the smallest I would go in front. The 12 is a pretty tight turn for the chain. You can fine tune your gearing with the rear sprockets.

[bansheesandrider]

Stock Gearing sprocket-sprocket is 14:40.

The mechanical advantage (MA) is 40/14 = 2.857

 

If you change to 13:40;

The MA = 40/13 = 3.076

 

3.077/2.857 = 1.077 or a 7.7% increase in torque at the rear axle. This also means 7.7% lower top-end speed and earlier, more frequent shifting

 

If you go with 12:40;

The MA is 40/12 = 3.333

 

3.333/2.857 = 1.167 or a 16.7% increase in torque and a corresponding loss of top-end speed compared with stock.

 

I'm running 13:41 (~10.4% increase in torque) and ride mostly woods with some steep, rocky trails and a little mud and I find the trade-off between power when I need it and frequent shifting is acceptable. But I'm new at this so the math stands - my opinion you should take with a grain of salt.

 

 

You can calculate your own set-up by substituting your numbers for the stock numbers and comparing as I did in the examples for your planned set-up. You'll have to use your experience and imagination from there :-)

Stock gearing for ALL years EXCEPT 87-88 is 14/41 and in 87-88 the stock gearing is 13/42, just don't want anybody to be confused.

[muggzy]

Stock gearing for ALL years EXCEPT 87-88 is 14/41 and in 87-88 the stock gearing is 13/42, just don't want anybody to be confused.

 

Thanks sandrider, I stand corrected. The examples still hold.

[rjdgriff]

you guys have been most helpful! im rather new to all of this and you all are makin things alot easier thank you all:) im learning alot and i am in love with bansheehq.com!!!

[muggzy]

Glad to help! I've still got a lot to learn too