Hello,

Anyone got any experience with these in an NSR? There are some references here to single-ring ones but can't find anything on the 2-ring replacement. Found variable advice on 'tinternet; some swear by them (KR1 owners have been feeding their bikes on this diet since OEM ran out), some wouldn't touch them.
One issue I have is getting an accurate size for them. Someone said '54mm' but that puts them the same as the low tolerance for a 'C' cylinder, I think. Sounds like a measurement taken with one of those cheap digital verniers so next to useless.
If they are only available in one size then I assume it would be around 53.965 (no mark piston) to permit fitment across all cylinders?
If that's the case, what are your opinions on running 'no mark' size pistons (or 'D' for that matter) in my 'A' cylinders should OEM become unavailable?

Thanks,

Brian