possible broken contraspring? (torque spring) By blueboy5000 (Read 1,124 times)

[blueboy5000]

So yesterday I was out whipping my wife's 2008 Roketa Bahama (handsome boy) around, and ran into a new problem I've yet to see. The clutch appears to be staying engaged when the bike stops.

I'm taking the CVT apart today, so I'm pretty sure once I get the clutch off, it will be dead obvious what's wrong. (Whatever it may be).

My question is: What would cause the clutch to stay engaged?

I've never seen this particular problem in the wild, but I have installed clutches and variators many times. I speculate the problem is most likely a broken clutch spring.

Thoughts?

[JR]

Good question, can't wait to see what it actually is?

JR

[bullet]

The same thing happened to my 150 Jonway today. I am going to pull the CVT cover and see whats up. Could be nasty in there as its been under a tarp in the rain for 4 days. First mile ok then it happened.

[blueboy5000]

The problem was a no-name belt. The belt was so worn it had become shredded on the drive plate side, and covered the CVT with black powdered belt remnant.

Belt dust had clogged the variator slides causing the rollers to be stuck, and also to develop flat spots an two of the rollers.

Disassembled the CVT and gave it good cleaning in the parts washer. The clutch works fine now.

Ordered some new 6g weights/rollers and a Gates Powerlink belt.

This surprised me as the bike only has 1400 miles. But the belt had Chinese writing on it, and no English anywhere, I would not be surprised if it was a poor quality belt.

[bullet]

I am pulling mine apart Monday morning. I hope I can get as lucky as you did.

[bullet]

Well I didn't get as lucky as you. I pulled the bell and one of the return springs and 1/2 its mount fell out. Its got a Gates Powerlink belt and it looks good but I am of the mindset that while its apart go with a new belt, rollers, and spring since I will be replacing the clutch.

[blueboy5000]

Good move Bullet. If you have a broken spring then it makes good sense to replace the belt as well. Along with the roller weights.

Man that sucks tho. Ah well, at least these cvts are easy peasy to change.

Good luck Bullet! Please post your results!

[bullet]

Everything went great today. A person I know has a scooter shop and after looking at my Gates belt, spring, and rollers told me they were OK. I replaced my clutch with one he rebuilt for $40.00. It takes a little more RPM to get moving but the hook up is more positive. I like it. Not radical at all. With the help of this forum (the people) my first trip into CVT-clutch-world was good. Thank you.

[blueboy5000]

Update:

After 25 miles on 6g weights and a Gates Powerlink belt, the contraspring broke.

Lol. I suppose the contraspring was the problem. Luckily all that was damaged was the spring itself.

But better safe than sorry, ordered new clutch and bell. So I'll try again in 3 to 5 business days

But man are the 6g rollers sweet for hilly areas!

[blueboy5000]

Installed the new clutch. Bike seems to be fine now. Put 50 miles on it so far.

Really digging the 6g rollers!

[alleyoop]

Great to hear you are up and running again, I know its a PITA waiting for parts to get you back on the road. But you got some new stuff on it and it should last some miles. Just once in awhile 1000 or so miles take the CVT cover off and clean out all the black dust produced from the belt. That stuff creates more heat in the cvt.
Alleyoop

[blueboy5000]

Thanks Alleyoop. I most certainly will inspect the cvt at 1000miles.