PJs are complete overkill on an NSR250R, and particularly on an MC16. The porting, compression, and ignition just isn't there to warrant them, and will destroy the performance. Even the first NSR250 GP bike only ran 34mm carbs. PJ/PWK38s only really have [some] use on the 300s, and even then we've not seen any real practical gains, but rather mid-range losses.

The RS carb shield base could possibly "fit", but it's highly unlikely to fit without modification, as the RS frame is significantly different to the NSR's. I'll go out on a limb and say that there's no hope of the rest of the airbox parts fitting.

RS250R NF5 components are all strikingly similar to NSR250R parts, but just different enough to give you real headaches trying to mix & match them. Numerous NF5, or NF5-derived parts, are used in the HRC Formula 3 kits, but need to be used as a whole kit.

Honestly, the best way forward, in my personal opinion, is to get it up and running with all the correct MC16 parts first, then start tinkering if you want to start boosting the performance. The bonus is MC16 parts are still relatively inexpensive at the moment, and they aren't technically restricted, but the downside is HRC parts for them are incredibly rare.
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Andy.
NSR-WORLD.COM

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