Comparing my 2000 RS to my 1994 NSR, here is what I noticed:
The NSR powervalve design is much less precise. In fact, most all the tolerances on the RS seemed much more precise, and machined to a higher quality. The RS exhaust port is larger and causes the rings to wear faster. The NSR is hampered by a large flywheel, generator, and kickstart system that robs power from the engine. In fact, I would bet the NSR tranny is built to a much lower standard and uses heavier parts, which rob power.
Basically, the NSR overall design steers more towards reliability, and the RS toward performance. This design goal effects almost every piece of the engine. To design the NSR to pump out 90hp would dramatically effect the reliability. It was never designed for that much.
And the porting is different. My RS had NO power below 2500rpm, and revved to 14k. That would totally SUCK on the street.
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Paul Herr
'88 FZR4/GSXR/YZF Frankenbike
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