November 20th, 2014, 04:55 AM
Joined: Oct 2003
I Ride: Husaberg Supermono, Ducati 888sp5
Originally Posted by johnyberg
Dr_C i guess the linear outside has the same dimensions with the OEM, the bore is safe to oversized at 102mm??? What's your opinion?
Hm. I have limited experience with std bikes and "normal" use, so I might not be the best person to ask about this... BUT, I think that the alu-liner is a bit weak already as it is. Bare in mind that it has limited support from the cylinder/casing where the piston to wall forces are high. If you are planning on staying below, say 65 RWHP, I think 1 mm less thick liner is doable. It might lead to higher blow-by and piston wear, but I do not think the liner will crack.
I'm using a 104 mm steel liner with some +80 RWHP at 8800 rpm, still trying to find the optimum piston clearance! Yesterday I got a liner back from "honing" with 0,12-0,13mm clearance. So, we'll see how that turns out!