Just came across this bigbore kit offered by Firefox Racing in England and wondered if anyone has ever used one, takes the motor up 275cc, looks quite radical too.
Not sure if that's the same one I have seen.....BEWARE!!
They magically turn an NSR250 cylinder into an NSR150 cylinder by reboring. And somehow manage to fit a 5 stud RGV VHM head onto a 6 stud NSR cylinder.
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