The 88-90 HRC F3 kit doesn't use the air correction, but does use different [HRC specific] carbs and ignition. I suspect one could be made to run without it all, but the reality is that stuff is (was) easy to get in Japan. It's not like someone in outer Mongolia trying to get a bitsa NSR running with little to no hope of getting hold of a correct set of carbs easily or on the cheap. I just don't see it... I think they were simply mis-advertised by someone who didn't know their arse from their elbow! 😉🤣🤣
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Andy.
NSR-WORLD.COM

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