The biggest issue with the MC16 is the porting. The exhaust ports are very small compared to the other models. In fairness, I think you will be surprised at just how well a 16 goes, once you've got it up and running properly. Even the HRC kit retains 28mm carbs!

The reeds are the same for all models, and good for high 60s. We've never seen carbon reeds give a measurable gain over stock, however they are much less likely to cause any damage if one breaks and finds its way into the motor! HRC rectifiers and spacers under the stopper plates give more noticeable/measurable gains.

See here for a visual depiction: HRC reed cages.

Of course, there's still plenty of additional performance hiding in an MC16, but it'll take some careful work to extract it. There are no simple gains like with the MC18 and MC21.
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Andy.
NSR-WORLD.COM

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