Please can you keep NS specific posts to this area, as multiple posts have the potential to fragment information and/or replies, and if you find me in a bad mood one day, posts going missing! I like to keep things very much in order... partly OCD, and partly to keep the information in its relevant section. It just makes thing much easier to reference in the future.
I'm afraid you are likely to find nothing is interchangeable between the NS250R and NSR250R. They really are chalk and cheese. I really do love the NS, because it's a bike of my era! I lusted after a Rothmans NS125 as a kid when learning to ride -- I had an MBX125F, the model that came before it, and obviously Freddie Spencer, who was riding the NS500 in GPs, was my first GP hero! But no matter how much I love them, I can't help but think you've possibly taken on a huge job, that I personally wouldn't want!
Your best bet is going to be scouring Yahoo! Auctions in Japan, to see what parts turn up. But be prepared to pay heavily for the privilege if you find anything decent, in both purchase price and fees/shipping. It's a very costly undertaking these days. Sorry, not trying to put you off or anything, but giving you a hint of what's to come.
NS250R oil pump on Yahoo! Auctions
Restoring it to its former glory is certainly doable though. I know TYGA performance have an MVX250 (the V3 that pre-dates the NS400R) and managed to source a lot of parts for it from Japan, and there were far more NS250Rs made than MVXs (the MVX250 was a one-year-only model), so much more chance of finding the parts you're looking for. You're likely to find more in common with the NS400R, but that in itself creates problems, as the Japanese market's gone bonkers for those and their spare parts too now.
As for performance, they're pretty much on par with anything else of the early-mid 80s, although in typical Honda form, slightly less manic, with a [slightly] wider spread of power/torque that its contemporaries. You're not going to see much over 45hp, although an HRC TT-F3 spec bike was claimed to be 55ps, so there's a little more power lurking in the motor if you're really desperate for it, but don't expect it to come easily.
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Andy.
NSR-WORLD.COM
Please keep all responses to Forum posts on the Forum so that others may benefit.
Please DO NOT PM me for technical advice. My time is precious, and you will probably receive a faster response on the Forum anyway.
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