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  #1 (permalink)  
Old 08-05-2018, 11:37 AM
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Bike Year, Make, Engine: 03 AIH TX Chopper
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03 AIH stumping carb

I think I've tried everything to get a severe stumble out of my 03 Texas chopper. I've check for intake leaks and have not found any. Engine is 107 SS with Daytona twin tech ignition. Bike has a bad stumble when between 2-3k rpm, 2 or 3 rd gear. My jetting I'm running now is 76 main, .031 intermediate with the air bleed drilled out to 3/64, which I just did to try and help. The bike has always had this problem. Also the little blue o ring is in place. I've got the air/fuel set at 1.25 turns. Bike idles great and will pull like a mofo when on the gas. I've tried with and without air filter. Nothing seems to help. Anyone have any ideas where to look ? Thanks
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Old 08-05-2018, 05:56 PM
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Sounds like you've been pretty thorough, be sure to check your float level. What pipes are you running and are they baffled? If you're running unbaffled and/or really short pipes you may not be able to fix your issue without baffles. Thunder Monsters work great if you want to try a baffle.
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  #3 (permalink)  
Old 08-05-2018, 07:13 PM
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CA, I'm running the V&H big radius with baffles. I'm leaning towards pulling the intake and putting new seals. It's about the only thing I haven't changed. Also it has some type of air turblator , I guess you would call it, which I plan on removing. Wish I could put a picture to show what I'm talking about.. it's mounted on the intake, then the carburetor isolator, then the carb.
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Old 08-10-2018, 02:10 AM
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If it has always had this problem, then maybe it doesn't like the air cleaner..Cut you a piece of porous cloth and wrap it around the paper on the element and reinstall, to enrichen it up a tab ,,try several layers if you have to ...see if that makes any difference..it may give you a signal. I remember mine had a lean stumble from improper paper element..too much air..
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  #5 (permalink)  
Old 12-02-2018, 11:35 AM
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I'm still having the same issue, just not as bad. Ended up drilling n tapping the air bleed circuit. Put a 54 in there. The plugs are looking real good with a 74 main and 31 intermediate jet. Next I'm going to jump to a 58 air bleed and see what happens.
I tried a 76 main which caused the plugs to getting black n wet.
Good news is I can now remove the carb in about 5 minutes
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Old 12-04-2018, 12:41 PM
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Back to the same line of thinking that Shovel52 was suggesting. What air cleaner are you running?

Try putting some kind of screen in air cleaner so break up the air flow. I had a similar problem, once I installed a small screen in line, it ran perfect. It was creating a venturi effect and shoving too much air in the carb at just the wrong time.
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  #7 (permalink)  
Old 12-05-2018, 10:03 AM
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Quote:
Originally Posted by golfish View Post
Back to the same line of thinking that Shovel52 was suggesting. What air cleaner are you running?

Try putting some kind of screen in air cleaner so break up the air flow. I had a similar problem, once I installed a small screen in line, it ran perfect. It was creating a venturi effect and shoving too much air in the carb at just the wrong time.
I have th stock air cleaner setup on my bike. Although it does have a K&N air filter. I'm going to pickup a paper filter and see what happens. Thanks
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