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Old March 25th, 2017, 09:16 AM   #7
jkv45
Rev Limiter
 
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Name: Jay
Location: WI
Join Date: Jul 2013

Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes

Posts: A lot.
MOTM - Jun '18, Oct '16
Quote:
Originally Posted by Triple Jim View Post
Jay, you really don't sacrifice much acceleration with taller gearing, other than off the line, since you can still keep the engine in the power band. The main difference is you'll shift at a higher road speed in any particular gear, and as Chris has noted, you won't necessarily reach redline or possibly even top speed in 6th. One way to look at is you won't have as much acceleration in any particular gear, but you make up for it by being able to stay in that gear longer than with stock gearing. Similarly, you don't really gain acceleration with lower gearing, other than off the line, and you'll shift at lower speeds in each gear.

Top gear roll-ons are a different story, of course.
I don't know Jim - by gearing "down" you are increasing torque multiplication in every gear. That translates into more acceleration and quicker revving due to the increased multiplication.

You will need to shift sooner and more often than you do with taller gearing, but you will gain acceleration. It's allowing the engine pull less load because of the benefit of torque multiplication.

That's how I see it, but I'd be interested in hearing other opinions.
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