How to choose the best roller weight?:/

ok...hello0o0 guys!im Vasilis and i am new here!

i have a cpi hussar 50cc...and i want opinions about the weight of the rollers i should choose...

i want good acceleretion bt i want to make it go faster to![:P]

s0o i hope you can help me!

thnx!(sorry for my bad english!)[:P]

rollers dont really make u go faster n slower they keep u in ur powerband although if u go to light it will reduce top speed 



Need more info. is it stock?