sorry a bit late to answer was in hollydays... Yes piston top to top is around 3 mm.... Actually, I kept the 52mm stroke ,126/186° and 1mm base gasket. Engine is now complete and shut. Excentric and 0,8mm base gasket ready for a next casing split if needed! Vtronic fan wheel didn't pass the right cylinder transfert hump and made an awfull grinding noise. Sort of a classic with pinasco kit! i had to dig a bit border of squish : head became too small after reboring. QS: 1,25 mm with the 1mm base gasket! cool isn'it? no head gasket needed. PS: GD never answered my question about MMW head/malossi piston matching.... Uploaded with ImageShack.us Uploaded with ImageShack.us Uploaded with ImageShack.us Uploaded with ImageShack.us