i mean did they recalibrate the rollers to the new engine setup? sounds like the rollers are still too heavy. i wish i could let you ride my scooter, it's got a 70cc Polini Corsa kit (tuned), Corsa crank, Leo Vince TT pipe, MHR 2005 vario, Malossi torque driver & kevlar belt, Malossi springs, Polini cf reeds, Polini 15/42 gears & it goes to 110kmh with great acceleration, all that with the stock carb & ignition.