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  #1 (permalink)  
Old 01-30-2012, 06:13 PM
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Carb issues....

Ok, I just got my first start up a couple of weeks ago and just getting around to working out the bugs. I have dual carbs and I have the adjuster screws all the way in, but the motor wont stay running if I take the choke off. What is some simple solutions to this problem. Could timing be one of the issue? I have not timed it with a timing light, yet.
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Old 01-30-2012, 06:39 PM
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Need a little more info, what carb, what engine, what ignition system. The engine won't idle with the idle screw all the way in, turn it out two turns for now and start from there, but I can be more specific with the engine, carb, and ignition info.
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Old 01-30-2012, 06:52 PM
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Sounds like a clogged idle jet to me. I just re-read the post. Do the timing first of course.
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Old 01-30-2012, 06:56 PM
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Quote:
Originally Posted by Captain America View Post
Need a little more info, what carb, what engine, what ignition system. The engine won't idle with the idle screw all the way in, turn it out two turns for now and start from there, but I can be more specific with the engine, carb, and ignition info.
89' Evo, 4-valve heads (jim feuling), dyna 2000 single fire ignition, dual keihin carbs.
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Old 01-30-2012, 07:08 PM
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Set the timing with a timing light with the choke on(since it runs that way), then you can adjust the carbs. Do you have a plenum style intake or does each carb feed a cylinder.
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Old 01-30-2012, 07:14 PM
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plenum style
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Old 01-30-2012, 07:35 PM
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Then I would start with both carbs set evenly, 1 1/2 turns out on the idle mixture jets and get both of your idle speed screws set the same. Make small adjustments to the mixture screws by turning them in 1/8 of a turn each until the idle drops, then turn them back 1/8 from there. Adjust the idle speed accordingly.
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Old 02-01-2012, 04:57 PM
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check for an intake leak too just to rule it out of the equation. I spray a non flammable fluid on all the sealing points if it stumbles or shuts off you are sucking air and causing an overly lean situation that the choke could be masking
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Old 02-02-2012, 06:22 PM
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Pushrod, I didnt notice any vac leaks. But tonight I came home before it got dark and fucked w adjusting the carbs as stated by Captain. Thanks Captain! It runs pretty good now. It hardly turns over before it fires up! Probably need to get it timed professionally though. Thanks again guys. I swear this is the best site ever! Ive been a member here for over 6 yrs and I couldnt have done it without the help of the awesome members of this site.
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Old 02-02-2012, 06:45 PM
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cool happiness is a good running motorcycle!
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Old 02-02-2012, 07:12 PM
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Glad it's runnin" better for ya!
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