malaguti phantom clutch springs

hi all i have got some clutch springs for my phantom it has 50cc minarelli ac engine i have 3 sets of springs 1000...1500..2000..rpm witch is best to use??????

 

If the engine is std then use std clutch springs.

 

it is not i have a big one pipe 76 jet malossi rollers malossi belt malossi air filter thats just what i no of i havent looked any more in to the bike but it dose 60mph just slow at take of

 

In that case it might want different weight rollers, if it's been tampered with then you need to try different thing's to make it work, there is no set parameters to work to.

 

yes but if i put lighter rollers i wil lose top end is this tru or am i wrong ???

 

my rollers now are 6.5 grams

 

my friend has nrg with same rollers as mine but it got red clutch springs he kills me at take off