Aight so heres my set: 4,8g rollers malossi multivar Stage6 streetrace 70cc Stage6 pro replica 19mm dellorto malossi reeds Stock clutch and red malossi springs It runs beatifully at 4,5g rollers other than the fact that clutch slips and thats why i have to use too heavy rollers for it and now im looking to get a new clutch. I am looking at clutches like malossi fly/stage6 sport pro because its only low sport 70cc. I just don't know at what RPM should i put the clutch to take it in. Heres some links i've saved http://www.pedparts.co.uk/ekmps/shops/thebikeshop/resources/Design/dyn2.jpg http://www.motot.net/w/images/4/42/Malossin_kaikki_kytkinjouset.PNG My set runs best at 8000-10000 RPM Under 7500RPM it struggles a lot.