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Old 11-Feb-2005, 09:39 PM
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DSC Member Shazaam! Shazaam! is offline
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Recommended Gearing

Questions come up regularly about recommended sprocket changes and the required chain lengths for superbikes. Here's my recommendations for general street and track use.



There's a "sweet spot" - around 4,600 RPM @120Km/hr in 6th gear for liter displacement superbikes, a little higher for 74X's. Obviously, faster tracks will require rear sprockets with fewer teeth, slower tracks more teeth (and possibly longer chains.)
I strongly recommended NOT changing the stock front sprocket or chain size for safety reasons. Just my opinion.

Last edited by Shazaam! : 08-Feb-2009 at 01:15 AM.
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Old 11-Feb-2005, 09:48 PM
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Brilliant, thanks !.mav
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Old 11-Feb-2005, 09:54 PM
electricsheep electricsheep is offline
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Old 11-Feb-2005, 11:30 PM
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Cheers! Shame I need a new chain for my 749S to try it though
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Old 12-Feb-2005, 01:44 AM
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Mood: Its ONLY a Bike Club
http://www.bikerenews.com/Stories_Ar...Calculator.htm

http://www.cosportbikeclub.org/misc/SpeedCalc.html

Maybe time to play with a few figures
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Old 12-Feb-2005, 01:47 AM
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Another item to place in the technical archive
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Old 12-Feb-2005, 07:16 PM
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can someone please explain what all that means ???

what are the suggestions for a 748 and what would be then end result

cheers

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Old 13-Feb-2005, 10:12 AM
ils ils is offline
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Great stuff (once again) Shazaam!
I changed the gearing on my 996S to 14/40 and was amazed at the way it makes town riding so much better, but I was wondering why you think it's dangerous to change the front sprocket size?
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Old 13-Feb-2005, 10:29 AM
Mr_S Mr_S is offline
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Quote:
Originally posted by deej
what are the suggestions for a 748 and what would be then end result

cheers

deej

3rd line down on the chart (14/40). It'll improve acceleration / drive for one thing.
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Old 13-Feb-2005, 11:31 AM
ducv2 ducv2 is offline
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Quote:
Originally posted by ils
Great stuff (once again) Shazaam!
I changed the gearing on my 996S to 14/40 and was amazed at the way it makes town riding so much better, but I was wondering why you think it's dangerous to change the front sprocket size?

I was told that due to the torque of the bigger engine, and the increased chain size, the chain did not appreciate running round a smaller radius sprocket, and that it was better (allthough more expensive) to go for a larger rear sprocket. I'm running 15/40.
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