KR-1S.co.uk Forum

i have been sorting a pair of carbs out and the mains are 147.5 rd jets.
[the bike was running ok].
but what i would like to know is, what size standard jet is equal to the rd
jet. as i know they both flow different.
[reason for asking is i want to order some standard mains from allens
performance and want to order the right size to give me a starting
point

Hi Martin,
140 genuine is the same (nigh on ) as a 150RD
137.5 maybe a bit leaner than what you currently have (147.5 RD).
Might be worth getting both to test.
HTH

thats what i thought. thanks dave