I think i may have found the problem. The metal bar that come out the side for foward reverse ect is moving back and forth a bout 10mm. It looks like there is a black seal that is around the pole on the clutch housing side needs to be pushed in.
Many thanks for your help too.
Cant upload pics...
I have a 125cc 4stroke semi auto qaud brand - WYAY.
It's got forward neutral and reverse.
Problem - It starts and idles fine in all gears. When put into forward or reverse and accelerate it just revs up and doesn't move.
I have tried - Changing the oil to quality oil and adjusting the clutch...