Andy wrote:Well, first you would need to have the barrels bored (buggers up the port timing). Then you'd need to fit the sleeves. Then cut out the ports, and blend them to the NSR spec. Then you need to consider the RC Valve pockets in the exhaust outlet. Once all that's done, you need pistons with the correct dimensions and thermal dynamics.

Alloy barrels were developed because the thermal expansion of the piston and barrel can be much more easily predicted and controlled. The Nikasil plating is far superior [when done right!] to steel liners, wearing far less, and the alloy/alloy combination allows a much closer piston to bore clearance. It's lighter too.