rear sprocket ???
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Squid
Joined: May 2005
Posts: 59
From: WV
rear sprocket ???
I was wondering if changing the rear sprocket will give me more power. higher top end. Stuff like that. I was looking at my girls r6 and her rear sprocket is quite a bit larger than the one on the hawk. what is the opinion here? I looked around a little on here with no luck.
Senior Member
MotoGP
Joined: Aug 2007
Posts: 2,547
From: Way Out West
Changing the rear sprocket won't have any effect on how much power the engine produces.
If by "higher top end" you mean road speed in a particular gear at a particular rpm, it has just the opposite effect.
The stock rear sprocket is 41 teeth. The largest you can use without needing to replace the stock chain with a longer one is 43 teeth. That lowers your effective final drive ratio by less than 2.5 percent.
Probably better to go from 16 to 15 teeth on the front sprocket 'cause they are cheaper to buy, easier to change and make a difference of over 6%.
Lots of people go 15 front and 43 rear which gives 8.5% to 9% lower gearing without needing a new chain.
Also remember the % change you make in gearing comes with an equivalent decrease in the accuracy of the speedo and odometer.
If by "higher top end" you mean road speed in a particular gear at a particular rpm, it has just the opposite effect.
The stock rear sprocket is 41 teeth. The largest you can use without needing to replace the stock chain with a longer one is 43 teeth. That lowers your effective final drive ratio by less than 2.5 percent.
Probably better to go from 16 to 15 teeth on the front sprocket 'cause they are cheaper to buy, easier to change and make a difference of over 6%.
Lots of people go 15 front and 43 rear which gives 8.5% to 9% lower gearing without needing a new chain.
Also remember the % change you make in gearing comes with an equivalent decrease in the accuracy of the speedo and odometer.
Senior Member
Superstock
Joined: Jul 2007
Posts: 387
Also, you can't compare one bike to another by sprocket size; top speed and such are determined by combination of BOTH sprockets and final gearbox ratio and how many gears and what kind of upper rev limits that engine has and and and ..........
Senior Member
SuperBike
Joined: Nov 2004
Posts: 1,315
From: Richmond, Virginia
Larger one will put more low end power to the ground. A smaller one will extend the top speed some, but probably not much due to wind resistance. Most people who change seem to go to a bigger rear (or smaller front) to get more low rev power to the ground.
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