Since I upgraded my Scram 440 to 500cc I have one perfectly run in 440 piston left over, only 5k km on it.
@Dool mentioned somewhere here that you only need to bore out the Hima cylinder (and hone it) which should be cheap.
The stock ECU will be running this relatively small displacement increment without problem (as it does in my 440 -> 500 conversion).
I will charge you packing and shipping, the piston (complete with rings etc.) is free.
PM me if interested.
@Dool mentioned somewhere here that you only need to bore out the Hima cylinder (and hone it) which should be cheap.
The stock ECU will be running this relatively small displacement increment without problem (as it does in my 440 -> 500 conversion).
I will charge you packing and shipping, the piston (complete with rings etc.) is free.
PM me if interested.