ive already installed smaller jets and a bigger tip for the exhaust witch made a big difference. but im thinkin of gettin a clutch kit but not sure if its worth loosin lots top end for some bottom end. Can anyone help me decide or give me other ideas for more performance thx

 

How does a clutch kit 'lose top end'? Is it a different final drive ratio?

 

when I installed the epi clutch kit I lost about 4-5 mph on the top end speed, but it was worth it to have the gain on the low end torque. I got my top speed back by installing a K&N gytr exhaust and dynojet kit. You could get a performance CDI box to help out some, or check out hauck racing, they can regrind your factory front clutch to have it gain more power without losing much on the top end speed, all you tell them is what you want it to do and what mods you have then send in your primary clutch.


Quad, as far as how a clutch kit loses top end speed, is with a belt drive automatic, what the clutch kit does is change the engagement point of the transmission, to a different rpm, in effect it is like changine the rear sprocket on your raptor or 400ex to a larger diameter which will give you more bottom end power but reduce your top speed. In an automatic it is just done with springs instead of a sprocket.

 

you can stick the mudbuster cams in there as well... and if you want to go further... think about a high comp. piston kit... (wiseco)

 

<div class="FTQUOTE"><begin quote>Originally posted by: ctateusa1


Quad, as far as how a clutch kit loses top end speed, is with a belt drive automatic, what the clutch kit does is change the engagement point of the transmission, to a different rpm, in effect it is like changine the rear sprocket on your raptor or 400ex to a larger diameter which will give you more bottom end power but reduce your top speed. In an automatic it is just done with springs instead of a sprocket.</end quote></div>

I understand how a variable ratio, belt drive transmission works, have one in my Polaris Scrambler. Regardless of where the initial engagement occurs, unless the springs and weghts prevent the full closing of the drive pulley or full opening of the driven pully, or the base pully diameter has changed, the final drive ratio, and therefore, the top speed won't change. Therein is my question. What changed?

By engaging at a higher RPM the engine is making more torque. The 'sprocket' ratio hasn't changed.

 

ok thx alot