New carbuetor

[DAugust84]

I just put a brand new oko 30mm carb with a bunch of jets( i got for free from a buddy) and i have no clue where to start jetting . Right now i have a 150 main and a 50 pilot in it i have to choke it for it to start and when it dose start it wont ideal and when i give it gas it revs ok for a sec and then totally bogs out and dies. What dose this tell me about my jetting, it ran fine before new carb.. i have never had to jet a carb before. When j bought this blaster it came jetted all ready. I put the new carb on because my stock one is cracked.

 

[joeak47]

Were is the stock one cracked?

 

[dirtysquared]

I've never messed with a 30 oko, but I've been told the horror stories about trying to jet them by people that have.

Where is your carb cracked at? If your not running a highly modified engine, the stock carb is your best bet. The stock 26mm mikuni is a very reliable, easy to tune carb. I still run one on my bike because of those reasons.

Maybe try putting a wanted ad up for a stock carb, I'm sure someone has one laying around they would sell you.

 

[Larry's Shee]

What are ALL your mods and what jets are in old carb?
VERY rough rule of thumb is Kehine/OKO pilot # is 2X a Mikuni. So a stock 32.5 would be about a 64-65 for OKO
Main jet # are 1/2 of what a Mikuni is. So the 150 that is in the OKÓ is about equal to abut a 300 Mikuni.
Because these are rough estimates you have to start large and work down.
What did this carb come off of?

Do a search on Google and here for 30 mm Kehine and 30mm OKO for jetting.