I have what I think is a Loncin 125cc. It has a 52.4mm bore and a 13mm pin, I'm trying to find a place to get a 53mm piston or a 53.5mm. Any help would be appreciated thanks
I work at a machine shop, we honed it and it doesn't look the best so I'd like to bore it since it won't cost me anything for machine work. I just can't seem to find a part number for a piston that will work
Maybe have a look at some genuine Honda pistons for it, you can get a 1mm over / 4th oversized piston for a 1980's CT110/ATC110 which is 53mm
You'll just have to check all the dimensions against the new one.