CVT Belt Change Problem  By  adventure (Read 3,395 times)

that would be my guess also. most-likely one or more weights have turned on its side.

Not familiar with the GY6, but on my Yamahas, the rollers cannot get out of place. They spend most of their time at the outside edge, because I ride them at WOT. The ramp plate will not let them go any farther than they are designed too. I also had a belt break (totally shredded actually) but found nothing else wrong. The rollers, as well as the belt, had been replaced only 4000 miles earlier. I took everything apart and inspected it, and never did find the cause of the premature belt failure. I replaced the belt with another oem Yamaha belt, which now has about 2000 miles on it. The scooter has 26,000 miles on it. The first 2 belts were replaced at 10,000 miles, without problems.

On your Rowdy, I would suspect a slipping belt. Sounds like it is grabbing then letting go, over and over again. That could cause the shuddering. I would look for an oem belt. If it broke sooner than the manual says to replace it, then I would also look for a cause. I would suspect that heat and being overloaded is what broke mine (I weigh 230 pounds, and rode at WOT most of the time), but that doesn't explain why the first 2 belts lasted 10,000 miles under the same conditions, and still looked good when replaced.

If you ever have to get into the cvt, my opinion is to always check the clutch pads and rollers. Your that far so might as well, never know what you might find.

I got a really bad vibration once, even had a rattle sound to it but it was still driving. Finally took clutch bell off and one pad had completely broken apart and spit pieces everywhere. My point here being that happened without a belt breaking or really riding hard ect. With the original Chinese parts it never hurts to look things over in the cvt, especially if you have a belt breaking event.

What kinda puzzles me here is that whatever changed to cause the problem happened when the belt was replaced. Maybe something else happened that caused the belt to break, or maybe the broken belt damaged something else. But the fact that it won't move at all to begin with and then shudders sure sounds like the belt is slipping, which could be caused by it being too long, or too narrow. I have 26,000 miles on my Yamaha 125, and the original clutch shoes, bell, and pulley faces look new. I replaced the rollers at 20,000, but kept the old ones. I could not find anything wrong with them. They were completely round. Of course most of these miles were out on the open road, where these parts did not get used very much. I was surprised that there were no grooves worn in the pulleys, because the belt spent most of it's time in one spot, at WOT.