Why won't my scooter idle properly since I replaced the drive belt?

by Bob Ryg
(Cleveland, MN)

I have a 05 Baron 150cc and the drive belt came apart. It is a 743 20 is the number on old belt so I found one and put it on and now it will not idle. It wants to engage the clutch now with the new belt.


I did not change the idle speed. I have to push the scooter and then hit the starter to get it to run or put it on the center stand to get the rear wheel off the ground. Need some help!!!

Thanks... Bob

Comments for Why won't my scooter idle properly since I replaced the drive belt?

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Aug 11, 2010
Baron 150 cc
by: Anonymous

I put on a new clutch and belt 743 20 30 the same belt that was on the unit. The old clutch was fine but replaced the belt first and would not idel. Then replaced the clutch and still have the same problem. I did order a longer belt and put it on it will idel now but lost the top speed. So i still need some help.
Tanks Bob

Aug 06, 2010
Easy One
by: Jim Zeiser

When the old belt came apart the rollers shifted in the variator. You have to take it off and reset them. One or more of them is sideways now and holding the variator open and making the belt ride up. Taking the variator apart is easy with a breaker bar and holding tool.

Aug 06, 2010
Replaced drive belt
by: George

I found that this is a common problem with CVT drive belt replacement. It sounds like your roller weights have come out of place. Take the new belt off by removing the front pulley.

The roller weights are located behind the rear plate. Remove the plate and make sure that the weights are still in the sides, if they come out or shift, the bike will run like crap.

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