How we tuned the clutch on our Ultimate Suzuki LT80. When the engine is upgraded and runs at higher RPM and horsepower it becomes necessary to have the clutch engage at a higher RPM.
Adjusting the weight of those roller will not affect at all the engagement rpm, it will only change the "variator" shift curve, so if you remove weight in the primary, it will shift slower and stay in "low gear" longer before the clutch will start to change the ratio. The engagement rpm itself is controlled by the centrifugal clutch on the back.
I have a mostly stock lt80 that im in the process of doing a total rebuild on. This quad will not be raced, however it'll be ridden by adults. I'd like to increase the rpm before the clutch engages. It sounds like you're recommending lightening the rear shoes in lieu of removing/ modifying the rollers. Hope to hear back from you.
Electro Man is correct. I meant to do a follow up video and correct my mistake, but ended up selling the quad. This is totally different than other clutch setups I have had.
I just picked up one of these for my 7yr old that has out grown his lt50- keeping stock for now, but will get it singing like yours in the years to come. I used redline mt90 in the transmission since its not a wet clutch and only uses 3oz- seems to work quite well.
Did you do anything to the rear? When we took 2 rollers out of the front it would rev for days and bottom end was strong but the rear would never allow higher gear ratio. Thanks.
317RIDER we sent the engine to Moore Racing for his national package. The cylinder is heavily ported and head is milled. There is a whole list of things he does to it. He does clutching, he changes the weight of the rear for later higher rpm engagement. This was just a little bit of fine tuning. The comments are correct, the front rollers on the drive pulley are more for top end. The rear driven pulley causes engagement. Although it looks to be similar to a snowmobile clutch, it’s actually much different.
