Violent_Rage wrote on 09/15/15 at 04:53:30:Dave,
is the size of the piston same as the original one?
No, there is no high performance piston available for the Savage. The only way to get a higher compression piston is to install a piston that was made for the early DR650, and the stock size piston for that bike is a 95mm (the Savage is 94mm). As the DR650 becomes a vintage bike, the availability of the High Performance pistons is also becoming a bit less common. So far the 95mm and 96mm pistons are available from stock - the 97mm is only made occasionally by special order from Wiseco.
So.....if you want a better piston you need to have your cylinder bored. This is not a job for somebody that only occasionally bores a cylinder and it needs to be done correctly. We have had 2 folks on this forum who have had the piston/cylinder fail when the boring did not provide adequate clearances. It is also a good idea to get the silicone carbide treatment to help prevent wear.