need starting point for 30mm okos

[sangheraent]

I needed a starting point for my 30mm okos. My mods are toomey T5s, Vforce 3 reeds, K&N, +4 Timing. Agressive trail port 4mill stroker and 20cc cool head domes. my current jetting on stock carbs is 250mains and it runs prime. I was wondering what jets to put in the 30mm.

[burleybanshee]

put in 155 mains, 52 pilots. raise the needle one maybe two positions, you have to play with it a little. Shoulod be close. The 30 oko's need bigger pilots than larger pwk's. Also when you have the carb bowls off. Take a drill bit a little larger than the exsisting holes that let the fuel into the bowl via the needle attached to the float and open them up. Not the hole the needle slides in but the ones that come out sideways that let the fuel into the bowl when the needle drops down. These are to small and you will run the bowls dry. I have the same basic upgrades and had these carbs, a lot of other people have had bowls running dry with the 30's. The fuel inlet holes are just to small to keep up with the jets in dragging/full pinned 1-5 or 6th gear runs, it will die out around 4th gear. Not good running lean like that, so fix the problem before it becomes one. A duel pingel does not fix the problem, don't waste the money, plus you lose your reserve when you switch over.

 

Those mains and pilot jet sizes are what worked in mine at 800 ft elevation down to sea level, with k&n pods. The jets were also checked on the sniffer on the dyno. Did a lot of playing to dial it in and seat of pants on the pavement and dirt.