jezzbennettsm wrote:rgv, kr1s are 56mm bore, i havent got any knackered rgv pistons lying around but im sure if you asked on the rgv forum someone would kindly measure gudgeon pin size and post a pic for you,think the old rg125 was 56mm as well

I have a few pistons kicking around, the rgv one is close but is flat topped, also being crankcase induction there are no port windows in the skirt.

The closest I found was out of my old tz250, but again no rear port windows although I could possibly machine some in if I got desperate.

Gutted a piston sold on ebay last night, doubt one will come up again in the near future!

Thanks Andy, I'm going to take a tdr250 for a mot this morning, my friend who does the mot's recons he can match the piston up for us to something similar. Fingers crossed!

Paul