Jetting for new SJ B pipe Mod....?

[sj1million]

I am the proud new owner of a B mod pipe and Factory pipe says they have NO jetting recommendations for the mod pipe (Im guessing its because of all the different combonations). Im rebuilding my '00 SJ and it currently has the Type 8, Riva head w/ 35cc domes, stock bore/porting and carbs, MSD enhancer, teau cite filters, and V-force reeds. Im just wondering what a good starting point would be. Im at sea level in florida.

I tried searching it but didnt find anything useful.

Thanks in advance, Doug

 

[#ZERO]

Dual Mikuni 38’s
72.5mm to 80mm Pilot Jet
135mm to 140mm Main Jet
1.5 Stock Needle & Seat
95 Gram Stock Spring (Dull Silver Color)
One turn out on both low speed adjusters or till smooth idle.
One turn out on both high speed adjusters or till max rpm.
Synchronize both throttle plates evenly.

http://www.mikuni.com/pdf/sbn_manual.pdf

 

[nikad58]

some people go for alot of jetting changes (i hear) but i just bump up the pilot jet from 70's to 75's.. im not sure about with the V-Force reeds..

ooops... thats for a limited chamber..

 

[aqua]

i would start at 75 lows and 135 highs....also 95 gram springs if you havent already done so.....you might end up with 72.5 lows but start rich and work your way down. i think 135's would be about right on for your highs

 

[SJet]

That will give you a place to start. Once you get the carbs close, you might also want to keep an eye on your piston wash. That will tell you how your overall jetting is.

Have fun

 

[Gainera2582]

use 75 pilot, and 135 main. Thats what i have for my jetting for the bpipe w/mod chamber on an unported stock sj.

 

[SUPERJET-113]

use 75 pilot, and 135 main. Thats what i have for my jetting for the bpipe w/mod chamber on an unported stock sj.

Ya but you blow up B pipes!:biggrin: