I bought a 78 yz80 off a kid to use in the back yard, it has no power what so ever, like you can run faster. So I pulled the cylinder off and the arrow on the piston is facing the intake, this piston had ports on it and they're facing the exhaust side. So im just making sure this isn't some speacial vintage bike with the arrow pointing towards the intake lol. I don't even know how this thing didn't catch a ring...
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