2000 model, drum brake . okay i have a 50cc speedfight and the pulley that turns a thing with splines to engage the brake keeps slipping off the splines. there is a bolt to tighten this pulley but when i tighten the bolt so far it goes loose again... this puzzles me so if anyone can get back to me on how i could solve this it would be apreciated, also my back brake locks on when i pull it any ideas how to fix this too ? please check out the image it explains more
[IMG]http://i420.photobucket.com/albums/pp283/nici1809/scooterbrake.jpg[/IMG]

http://i420.photobucket.com/albums/pp283/nici1809/scooterbrake.jpg

nicky ross, May 2009

excellent!

bb, May 2009

bb thanks alot, i have took the wheel of and the splines wernt worn in the middle but the seal had gone and water got in and coroded so i cleaned existing part with wire brush and greased it and replaced seal and the splines wernt that worn at all (just on the edge which didnt effect the pulley) and now it works like new. thanks alot for your help

PROBLEM RESOLVED

nicky ross, May 2009

Hi,
good picture and useful!! You will have to take back wheel off and replace worn parts. The spline is rounded off and so needs replacing. Some bikes you will need to replace the whole drum. Not sure on your model but one thing is for sure get wheel off and replace part/parts.

bb, May 2009