Recommended Gearing

Shazaam! · 11-Feb-2005, 20:39

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.

madmav · 11-Feb-2005, 20:48

Brilliant, thanks !.mav

electricsheep · 11-Feb-2005, 20:54

Stunning

Twinfan · 11-Feb-2005, 22:30

Cheers! Shame I need a new chain for my 749S to try it though

skidlids · 12-Feb-2005, 00:44

http://www.bikerenews.com/Stories_Ar...Calculator.htm

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

Maybe time to play with a few figures

Harv748 · 12-Feb-2005, 00:47

Another item to place in the technical archive

deej · 12-Feb-2005, 18:16

jeez

can someone please explain what all that means ???

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

cheers

deej

ils · 13-Feb-2005, 09:12

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?

Mr_S · 13-Feb-2005, 09:29

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.

ducv2 · 13-Feb-2005, 10:31

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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11-Feb-2005, 20:48	#2
madmav Registered Forum User Ducati Corse Bikes: 1098 Posts: 3,060 Join Date: Dec 2003 Location: West Midlands Mood: Chilled Brilliant, thanks !.mav Reply

11-Feb-2005, 20:54	#3
electricsheep Registered Forum User Big Twin Posts: 1,037 Join Date: May 2003 Location: Reading Mood: Diet Stunning Reply

11-Feb-2005, 22:30	#4
Twinfan Registered Forum User Big Twin Posts: 1,773 Join Date: May 2004 Mood: Proud to own a Ducati :0) Cheers! Shame I need a new chain for my 749S to try it though Reply

12-Feb-2005, 00:44	#5
skidlids MotoGP God Posts: 18,274 Join Date: Apr 2002 Location: Oxford 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 Reply

12-Feb-2005, 00:47	#6
Harv748 Registered Forum User Big Twin Posts: 1,882 Join Date: May 2002 Another item to place in the technical archive Reply

13-Feb-2005, 09:12	#8
ils Registered Forum User Mille Posts: 142 Join Date: Oct 2003 Location: Edmonton, north London 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? Reply