Gage Posted January 9, 2011 Report Share Posted January 9, 2011 I purchased a banshee with a 402 kit in it and i was wondering what the piston size would be for this kit? It has low compression so i need to freshen things up a bit. Quote Link to comment Share on other sites More sharing options...
dirtydownunder Posted January 9, 2011 Report Share Posted January 9, 2011 stock stroke (54mm) plus big bore 68.75 bore = 401cc. 4mm stroker (58mm) plus 66.5mm bore = 403cc just take your jugs to a machine shop and ask them to check them out. they will tell you a size or if they need a bore, it will need to be honed anyway. Quote Link to comment Share on other sites More sharing options...
Gage Posted January 9, 2011 Author Report Share Posted January 9, 2011 stock stroke (54mm) plus big bore 68.75 bore = 401cc. 4mm stroker (58mm) plus 66.5mm bore = 403cc just take your jugs to a machine shop and ask them to check them out. they will tell you a size or if they need a bore, it will need to be honed anyway. Yeah I just needed to know what size pistons to get next. I've ordered the tools to check the size i'm just waiting in the mail for them. I'm getting antsy and wanna get this top end asap so i can ride on the ice. Quote Link to comment Share on other sites More sharing options...
tedd1 Posted January 10, 2011 Report Share Posted January 10, 2011 Do the pistons that you have now have a number on them? Do not buy pistons until you have the cylinders properly measured. Quote Link to comment Share on other sites More sharing options...
RZBansheeMan Posted January 10, 2011 Report Share Posted January 10, 2011 post some picture of your cylinders, pistons with numbers on the top.. Quote Link to comment Share on other sites More sharing options...
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