Jets

rgv mike · Post by **rgv mike** » Sun Aug 12, 2012 2:23 pm

Question what difference do RD jets make? Got 137.5 mains which are marked up RD, do they equate to a different size for Keihin's? Standard KR carbs by the way. Any answers greatly appreciated.

Bikemike · Post by **Bikemike** » Sun Aug 12, 2012 2:45 pm

Rd jets have been tested to flow less than keihin jets. 137.5 rd jets will flow less than keihin 135, probably nearer 132 or even 130. Is it kr1 or a kr-1s?
If you need more jets, Allens performance have genuine keihin jets for about £3 each, worth it for peace of mind- you really don't want to be running too lean.

headcoats · Post by **headcoats** » Sun Aug 12, 2012 4:09 pm

Throw them in the bin

rgv mike · Post by **rgv mike** » Sun Aug 12, 2012 8:07 pm

Thanks for the answer, its a KR1-S and they are they jets that came in the bike. Bin it is then

dave32 · Post by **dave32** » Sun Aug 12, 2012 11:24 pm

Your quite a bit leaner than stock with what you have at the moment.
RD142.5 flow LESS than 135 genuine (stock)

RD150's flow slightly more than a genuine 140.