A good fresh delimited R2/4J should be closer to 60hp, Rob. Yours was just a tad under 58rwhp last time it was run.

The R5/6K tends to give the best results of any NSR250 as stock [delimited]. I would say the '88 PGM and big flywheel are what really hinders it, compared to the later PGM-II and smaller flywheel. The 1988 motor has great potential though.

I'd like to swap '88 and '89 pipes one day, to see what difference they make back-to-back on the MC18s.
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Andy.
NSR-WORLD.COM

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