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DRIVE LINE
Posted: Tue Nov 27, 2012 5:18 am
by PurpleMonsta808
whats the differences bettween soft center & cclutch spring and hard?
looking to get crazy fast bottom end. i have a stroker 120cc
ive been told that stiff spring is for bottom end and soft id for top end?
Re: DRIVE LINE
Posted: Tue Nov 27, 2012 9:24 am
by Wheelman-111
Greetings:
The center spring resists the variator's need to shift. Stiffer Contra will resist longer, raising RPM when you go WOT higher than a softer spring. It has NOTHING to do with the RPM speed at which the clutch itself engages.
What you've been told about the center spring is sort of true to a point, but the same thing results from lighter or heavier rollers. At the end of the day, take-off depends on the triple springs. WOT RPM during acceleration is a function of the BALANCE between the centrifugal force of the Vario load and the linear static resistance of the Contra spring. Top speed is a function of the power the engine can deliver through the MAXED-out, fully-shifted variator to the final drive balanced against wind drag. The only ways the CVT transmission can affect top speed is if
1. The rollers are too light, or the spring is too strong to take full advantage of the "overdrive" at the belt, or
2. The rollers are so heavy that they keep the engine from revving up into its powerband.