yeah its 's the 125 i was looking for , i have one now from ron , 3rd oversize so will now get barrel bored to suit ( is second oversize now )
250 pistons dont seem to be as hard to get , readily avalible in all sizes on ebay from the states if needed , ron has them as well
might need another 125 piston soon as my cousin is getting out another 125 CZ he has , ex dave basham bike , he won the 73 125 national title on it , motor is very worn last time it was used it had little compression and had to be push started , see how much time we get to it going he is doing a 250 ATM for the VMX nationals