The bores are Nikasil plated so not suitable to be honed As for pistons the only aftermarket ones that were made for the 600SS was the ones Baines Racing at Silverstone had made There were several 675cc kits around that were allowed in the first year of Desmo Due but not sure if there are any available on the second hand market and prices may be close to that of buying another engine Checkout the Desmo Due Paddock on Facebook |