dtcohen Posted July 17, 2009 Report Posted July 17, 2009 new piston on left, old piston on right the ports on the old piston are a lot bigger than the ones on the new pistons will this change the performance of my banshee? Should I have a machine shop mill the new pistons to match the old ones? also, the little port thing above the wristpin has a slightly different shape, does this affect performance? both pistons are wiseco Quote
KEVSWS6 Posted July 17, 2009 Report Posted July 17, 2009 Someone cut the old pistons. You wont see much from that at all. I only cut drag bikes that are looking for every little bit of HP. Put your new pistons in and go. Quote
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