I guess I was wrong it’s 42mm stroke. So all I need is a 52mm piston but the one’s I can get cheap for the jog engines seem to be different. I can get single ring Koso 52mm pistons dirt cheap. I’m going to call around tomorrow and check ,Wisco shows a 52mm, man I hate to go back to paying 100 bucks for piston kits but we’re not racing it I won’t have to change it until it won’t start LOL

Where do you get your 52mm pistons ?

The 80 piston's on the left and a Hetrick B52's on the right that's the part that sucks I can replace the B52 with a single ring Koso cheap o well.