There are two MC18's, the Mk1 (MC18R2J and R4J-SP) and Mk2 (MC18R5K and R6K-SP).

There is nothing inherently wrong with an MC18, and the motor in stock form is arguably better than the MC21's, but the MC21 is overall a slightly "sharper" package, and has better support. Remember though that the biggest issue for the NSR is the crank rebuild parts are not officially available. The MC18 uses a different centre seal to the MC21/28 (a seal is available for these models) so if the crank dies you could run into big problems.

The MC18 suspension will need a good rebuild and the F3 shock link plates to sharpen the steering, then you will find it's still a very competent bike.

I would personally choose a Mk2 for the integrated PGM-II electronics, but it doesn't really matter.
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Andy.
NSR-WORLD.COM

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