sami1 wrote:
Andy,

I have a spare mc18 cylinder which has been faced. I’ve seen a video on YouTube where T2Racing use a dial indicator fixed to a bracket which is secured to one of the head studs. Is this to check the piston height at TDC and make sure the correct thickness base gasket is used so that both piston heights are they same? Same squish on both cylinders ? Approximately 1.1~1.2mm ?

Yeah, I'd guess that's what he's doing.

The OEM Honda [ART] pistons are incredibly good (they also made the RS250R/NSR250/NSR500 pistons for HRC), and we never found any measurable differences in the crown heights, so we always just measure the barrels with vernier calipers.

I'd never use another piston in an NSR! (Someone sent us Mitaka pistons to use in their motor once, and we had to machine them to fit! They hit the crank on BDC!)


_________________
Andy.
NSR-WORLD.COM

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