so, if I add maybe 4 strokes is that the equivalent of adding a +4mil stroker to my 450? I'd like to make the bore 50mm... so maybe I need some rust agent or a smaller sleeve... anyone got a moped laying around? maybe I'll make it a 2 stroke piston so I can subtract 2 strokes from the 4 and just add 2 strokes and leave it as a +2mil stroker so I can convert it to diesel and run direct propane injection them little green tanks have plenty of power band too... nah, making it too easy, maybe I'll just wait til the batteries in my digital caliper start to go and the bore will be smaller