My gy6 qmb139 chinese scooter squeak when I accelerate what is the problem

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[cheersmate]

I put a new malossi clutch bell in my 125cc recently and now my bike squeels whenever I accelerate.

[nunoprata]

Buddy I own a 54.000km Daelim s1 125cc scooter. When I roll up a hill, carry a pillion or accelerate abruptly, my transmission kinda "slides" and the scooter stutters. It's not an engine issue, I'm almost sure.
Do you think it might have the same problem? I checked the belt and it's ok :(

Thanks in advance!

[jpfishing]

Hey i replace my clutch to a performance clutch and bell bt when i accelerate it sound like a whistle from a turbo why is that

[lofturhjalmarsson]

why not just use sandpaper on inside of clutch bell like others say