For my winter project i want to totally rebuild my old faithful pk 80cc. It has over 2000kms. I want to replace the crankshaft bearings, wristpin bearings, and piston rings good quality non Chinese stuff. I also want to do some mild porting and compression mods. So, I'm gonna need some help here. Does any one know of any high quality replacements for the rings, crankshaft bearings, wristpin bearings, etc. Suggestions welcome for what else i could do to it to make it more heavy duty/ faster.