Here's a chance for all you budding tuners to learn about the NSR motor and make some comparisons against race components.

Measure the standard NSR deck height, squish clearance, combustion chamber volume and piston crown height, then try the same with the RS piston. This will show you the differences so you will have an idea of what to do.

I could tell you the figures but that takes the fun out of it doesn't it?

An RS piston is lighter, so better response when you turn up the volume.

The single ring offers less friction so saps less power, but doesn't seal as well at low rpm as a twin ring design.

The side cutouts have do effect on port opening or closing.

If anyone's worried about reliability or regular top end rebuilds then stick to the standard parts.