Comments on: Upgrading With The Correct Clutch For An Easy Pull

By: John Magee

John Magee — Tue, 07 Jul 2009 03:10:58 +0000

John – If the engine/clutch combo requires 500 lbs of pressure to keep the clutch from slipping at peak torque, you need 500 lbs whether it’s all spring pressure or part from the springs and part from centrifugal assist. If you pull the lever at peak torque it will feel the same regardless of how that pressure is arrived at. When you go above that point, it gets even heavier, fast, at the square of the RPM increase. It is possible to over power the clutch mechanism with centrifugal force, and you have to be careful with the amount of counterweight added to the levers when using a full automatic race trans to avoid breakage. Clutch Pro software has our (Bandit) clutch info built into it if you are curious about the math, it’s available from Quarterjr.com.

By: Randy Aron

Randy Aron — Mon, 06 Jul 2009 17:30:28 +0000

Hi John,
I have used this on a bike I built that has a 145″ and a “twist” clutch control at the handlebars. Well going through a few different manufactures wanting an easy turn of the grip, I used this to stop clutch slipping at high revs. I hope this helps.
Randy

By: john reed

john reed — Wed, 01 Jul 2009 21:17:20 +0000

I know the clutch is easier to pull with a centrifugal pressure plate at low rpm,but I was wondering how hard it is at high revs, could someone who has used this system advise please.

By: Rick Mosley

Rick Mosley — Tue, 30 Jun 2009 15:30:22 +0000

Interesting. I guess my shop/builder didn’t know what he was doing when he installed a new clutch on my bike making my left hand suffer at each shift.