Piston grade for Malossi 172

Hello

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?

 

Regards

John Aage

Hi,

a,b,c,d means the 1/100mm that the pistons goes bigger

 

if you have a "a" use "a" - IF YOU HAVE AN OLD cYLINDER WITH MANY THOUSANDS OF MILES THAN USE THE B

 

REGARDS

Hello

if you have a c piston,you should leave a piston of the same tollerance