I'm new here, but hope that someone out there can help me.
I've got a Runner 180 engine with a Malossi 172 kit, and are now overhauling the engine.
When it comes to my cylinder and piston it starts to get worn.
Now I've seen piston kits graded A,B,C,H and D (The H should probably be an C).
Is there anyone out there that knows more about these?
What are the measures on the different pistons,
and what would be the perfect clearance?