Yamaha Starbike Forum banner
1 - 20 of 43 Posts

·
Registered
Joined
·
48 Posts
Discussion Starter · #1 ·
I have installed the maxair kit plus idle screws and have nasty pooping with constant throttle and have gone through carbs twice and synced twice. I tried the raise the needle and that didn't work and tried to up both jets to no prevail and rear spark plug is ghost white, I didn't check front yet.
 

·
Administrator - "Loose Nut" - Houston, Texas
2001 Vstar 1100 Classic (sold), 2006 HD Electra Glide Ultra Classic
Joined
·
13,934 Posts
All settings are close approximations from many years of real world experience from multiple people. The suggested settings get you close. Try turning the PSM screws out 1/4 turn at a time to fine tune, provided everything else is good. Have you checked your exhaust gaskets. A leaking exhaust gasket will allow extra oxygen into the exhaust when you close the throttle and will get an exhaust pop.
 

·
Registered
Joined
·
1,820 Posts
did you get needles with the screws? how many notches 5 or 6? Backfire on constant throttle is from being rich isn't it? what did the plugs look like when you changed them?
 

·
Registered
04 V Star 1100 Custom
Joined
·
166 Posts
I would run stock needles I read they work better with max air my kit should be here tomorrow from maxair and I am leaving my stock needles one place
 

·
Registered
Joined
·
1,820 Posts
I tried bigger jets and it took top end popping out but still had 20 to 60 ish percent throttle back fire.
147 mains 17.5 pilots 3 turns on the screws and 2 shims or you have to experiment with the notches. sorry thats all i can tell you.Are your plugs black or white?
 

·
Registered
Joined
·
1,820 Posts
yes stock needles at some point went to notches. mines a 07 and it doesn't have notches, so theres no set rule. mikuni needles have a different taper than dyno needles so if you have mikuni needles you should use miluni jets.
 
1 - 20 of 43 Posts
Top