"I have used after market piston and rings once and never a gain, my run never lasted one day when the pin in the piston pushed in for what ever reason and the ring walked around to 2 the open port side and wiped out my jug just like that and at a cost of 500.00 parts and my labor 2 fix it. over the 40 years i,ve been with yami i have never known them 2 have a bad piston pin or rings, and so far the wisceo pistons have been very good. for the 40 dollars u save on piston and ring verse the 500 dollar repair. AL thats my 2 cents"
lve been using wiseco and other aftermarket pistons-aftermarket gasket sets since i was a lad as you do at 12yrs (infact i would reuse or make gaskets all the time when i was a kid, still make gaskets now for weird hard to find stuff) when you pay for your own stuff, in everything from a yammie FS1E's to proddy racing RD350LCs, open class MX bikes, jet skis and more inbetween than i can remember.ive never had a problem with any of them, if i had i would have stopped using them! just my .02
lve always wondered how much of the 'bad press' that aftermarket has got is due to inexperianced/incomptetent people just doing a cheap half job/not knowing what there doing vs shop repairs that use OEM.