I'm working on getting a 1988 NSR250 back on the road. The bike is complete but has been sitting for a while so a cleaning out and rebuilding of the carbs was necessary. I bought a carb rebuild kit that includes needles. The needles that came out of the carbs were stamped BPD and BPE. Correct for the bike according to published specs. The rebuild kit needles are identified as D680S and D681S. Are these comparable to the original needles and, if so, how do these numbers relate to the original needles?

Thanks,

Ken
Eastern Ontario

Hi Ken,

I have bought aftermarket carb kits for my mc18 88’ and only used the pilots and main jets and seals/ O rings. I was unsure if the needles supplied were an exact replacement.

I think the needles supplied were for the 89’ year carburettor.

The best kits are from Keyster Japan which have exact replacement needles J3EA for left and J3EB for the right.

Thanks very much for the tip. I've followed up and ordered the kits from Keyster in Japan

Ken
Eastern Ontario

sami1 wrote:Hi Ken,

I have bought aftermarket carb kits for my mc18 88’ and only used the pilots and main jets and seals/ O rings. I was unsure if the needles supplied were an exact replacement.

I think the needles supplied were for the 89’ year carburettor.

The best kits are from Keyster Japan which have exact replacement needles J3EA for left and J3EB for the right.