The problem with all the NSR stuff is it's valved for a rider often about 1/2 the weight of your average westerner! I've found increasing the oil weight to 12.5w is a good starting point, but a thicker oil makes the valving less efficient, so you can't really effectively go to 15w. You can also increase the oil level a little, but the ideal solution is to have the forks revalved.

I ran 1990 RS RWU forks (the ones with the additional compression adjustment) on my MC21 with 12.5w oil and it was fantastic, although they are shorter than NSR forks and new geometry scrubbed the front tyres out really quickly. The adjustment had to be pretty much MAX on everything though, as I was 96~97kg then.

I run 1991 RS250 USD forks now and surprisingly they don't need any internal modification (for my capabilities anyway). Even the adjustment is backed right off, and could probably go a little softer still, although I do like a firm ride! (Oo-er! ) I now only weigh 87~88kg too. Losing best part of 10kg made a significant difference... to a lot of things!
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Andy.
NSR-WORLD.COM

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