wiseco prolites are the only way to roll ,but the clearance wil lbe slightly more onthem compared to the stockers ,wiseco are just plain bettter pistons period , when a builder gets it ,they should check the cylinders wit h a dial bore gauge and see if it ll be okay to run . after tthe port/polish it gets a hone job to break the glaze on the cylinders to allwo the rings to seat and stay lubricated . stock pistons are shitty IMO ,they are casted and are less precise and consistant i n every way, also they have more flaws and a rough crude casting o n the crown and small uneven intake windows.when carbon builds up o nthe crude roughass stock crown it builds up fast then it wil l loadup/pitt up your squishband and make your bike overheat aLOT and ru n like ass . wisecos are lighter they have a very smooth fine piston top that resists loading up with carbon and nice large intake windows .they are pretty sturdy for aggresive port jobs too . |