R2/4J (Mk1) should be 110/70x17 and 140/60x18
R5/6K (Mk2) should be 110/70x17 and 150/60x18

Stock sizes on all NSR's work better than any over-size tyre in almost every application. Some have successfully run 120/160, but they are also running different rims and are racing.

Every street NSR I've ridden that's run over-sized tyres, and I do mean every one of them, handled like the proverbial bag of brown stuff!
_________________
Andy.
NSR-WORLD.COM

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