Don't get me wrong, Glyn, the later spec parts are definitely superior, but ideally need to be used as a complete package. I.e. all 1988 parts, all 1989 parts, or all 1990 parts (heads/barrels/carbs/wiring harness/ignition/servo etc.) used together.

If you're willing to put the time and development in, 1988/89 barrels and carbs will be of value to your tune, but you will definitely need different expansion chambers and a lot of fiddling to get the RC Valve operation correct. RC Valve timing is crucial for not only peak power, but also the NSRs characteristic wide spread of bottom-end/mid-range.

In my opinion, the greatest gains for the MC16 will be found in the crankcases and with a decent set of expansion chambers. I would probably start off with modifying a set of R2J pipes, as I already mentioned.
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Andy.
NSR-WORLD.COM

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