Belt problems just 200km and belt broke

[remcosuper8]

Problem with my kymco super 8

A couple of weeks ago my starter went bad and because my kickstarter wasn't working.
So i repaired my kickstarter and doing so i saw a little wear on the belt where the letters a print on.
So i ordered a new belt, new weights and new rear poulie because it was worn.
Last week i replaced the belt, weights and rear poulie and took out the bendix so that it wont rub.
I also cleaned everything and all was good so i thought.
150 km later the speed dropped and the revs dropped that day it was very rainy so i thought it was a ignition problem but not so much luck.
The next day the same problem and after some driving the rear wheel locked doing 50 km/h and no more drive.

This is all that was left.
Lucky me that i threw the old belt and all the tools to change it in my scoot so i didn't have to walk.
What i know is that:
- The belt wasn't rubbing
- The belt was the right size
- The old belt lasted 2000 km and was only replaced because it was lightly rubbing on the bendix

Was i unlucky and did the new belt had a defect in it or is there a bigger problem?

[diynuke]

hard to say tho but it shouldnt rub anywhere

could you maybe send some pics of the whole cvt?

i am already riding 9000km on mine (time for a new one!...)
and that's with an 72cc so there is a bit more wear

so yeah something went horribly wrong in there...

what weight rollers do you have in there?

only thing that i could think of now is too light rollers and too light contraspring but then you should have noticed that the belt was slipping.
so yeah i guess a faulty belt.



and what is your top speed?


i had a belt that was just 5mm longer and it reduced the top speed to 50kmh with it blasting in the rev limiter. 
then i placed the old belt in there and then the speed jumped to 70kmh on the speedo  still blazing in the rev limiter but that's normal 

[remcosuper8]

The total setup how it is now:
- 72cc naraku v2
- Touring camshaft
- Restricted cdi
- Malossi Multivar
- 7.5 gram rollers
- Dayco belt
- No name sport clutch
- Original contra spring
- Top speed 55km/h GPS
- Technigas GP4 exhaust without db-killer

So maybe is was just unlucky or i have to put the 1000 rpm contra spring and a little heavier roller weights.
The old rear poulie had a malossi white contra spring and naraku torquedriver and 8 gram rollers

[cagiva4ever]

-over size/high speed 89mm diam front RollerCup ?
-genuine Dayco, not fake dayco ?
-rear CVT wobbling, rear plate with wrong alignment Due Welding... ? has to be spot on like 0,05mm Accuracy....not a 0,1mm or bigger wobble, or worse...

[remcosuper8]

I found the problem (ok 2 problems).
The original contra spring is to weak for a 47mm bbk because the belt slips (today was the first day without snow so i could test with full throttle)
And something came in the cvt cover i didn't see what between al the belt pieces but there is a scratch/dent on the inside off the variator starter gear.
I already replaced the contra spring and have to order the variator starter gear and some heavier rollers.