Those forks are becoming increasingly harder to source (youngest bikes are almost 25 now, remember!) and with more "classic" Hondas getting restored to original condition/spec, consequently asking prices are rising sharply. It is a nice conversion though, looking very much like it was meant to be there, as long as it's well set up. I rode an MC21 with a straight swap years ago, and it was awful!
A CBR600/1000RR conversion makes more sense in that there are a lot to choose from, and also come with radial caliper mounts, which many people crave these days. But I have to disagree with the "use the whole front-end" part. If you're going to the trouble of fitting different forks, then in my opinion you should make the effort to at least use an NSR wheel so it looks in keeping with the era.
What must be taken into consideration, with any conversion, and in particularly if using 600/1000 forks, is the setup. That suspension is designed to work with far heavier bikes than the NSR250. Also, unless set up properly, in my experience, a 3.5" front wheel really screws up the NSR handling.
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Andy.
NSR-WORLD.COM
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