Accel. problem

i changed the rollers in my gilera skp 50 to 6.o grbecause i had bad acelleration. Once changed my acelleration was great, but after a few days it died back down to being really bad up hill and on a flat. any ideas?

 

still too heavy, or belt slip.

 

i'd probs go a lil bit lighter mate, and as above, is the belt old? could be slippin or slighty stretched

 

yeah i think the belt will be old to be honest as it has been sat for a while.