Well, if the seller is genuine, I don't see why he wouldn't want to confirm that the engine number falls within the 1989 number range. Just to make sure it's all R5K under the skin!
I'd also question why it's pictured alongside at least 5 other NSR250s and a CBR400RR Gull-Arm if it's a private seller. It looks more like a grey import dealer to me. Even the most hard core US NSR owners I known/met over the last 25 years haven't owned that many NSRs at once, and those who've owned two or more generally kept them in near mint condition, given the expense and difficulty obtaining/registering them in the USA in years gone by!
I'm not saying it's not a good bike/buy, and a clean CA title is worth a lot, but I would say to approach it eyes wide open. It doesn't exactly look like a bike that "has been well cared for and stored in a climate controlled garage" to me, so just [a] buyer beware, and [b] budget to spend time/money after the fact to bring it up to spec.
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Andy.
NSR-WORLD.COM
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