Okay, so I got the CBR900RR petcock, and it is the part # listed above (16950-MWO-790). Looks exactly the same except for the reserve tube, and filter. But that's a direct swap with the NSR parts (as stated above).

So stephen, when you get your part, it will work just fine.

Also, a little trick. You can pull the reserve tube out, and just use the filter (basically doing away with reserve). Of course for street use this may not be a good idea, but for track use, its a pretty good idea. Keep the filter in place when you do this.

Thanks,
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Charles Gallant