13-01-19, 11:54 AM
Mmmmmmmmm....well I did warn you 
......not an easy job but good to do a proper job in replacing the base gasket :thumbup ....well , youve had a bit of back luck which happens to us all at times , a few pictures of the scratch would be good , also , whats the bores like ? Again a picture would be good , as for using second hand pistons, yes fine but check size first , very unusual for anyone going to the trouble of re-boring these bikes, great bikes but most would replace the engine if any serious problems and probably cheaper .....re using pistons rings is something i wouldnt do, rings wear and bed into the cylinder , swapping from one used engine to another could result in poor compression and a smoky engine caused by oil getting past the rings and burning in the combustion chamber..........not sure of the cost of rings but thats the way i would go.....good luck 
......not an easy job but good to do a proper job in replacing the base gasket :thumbup ....well , youve had a bit of back luck which happens to us all at times , a few pictures of the scratch would be good , also , whats the bores like ? Again a picture would be good , as for using second hand pistons, yes fine but check size first , very unusual for anyone going to the trouble of re-boring these bikes, great bikes but most would replace the engine if any serious problems and probably cheaper .....re using pistons rings is something i wouldnt do, rings wear and bed into the cylinder , swapping from one used engine to another could result in poor compression and a smoky engine caused by oil getting past the rings and burning in the combustion chamber..........not sure of the cost of rings but thats the way i would go.....good luck
One, is never going to be enough.....