02-09-2016, 11:55 AM | #31 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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Sounds like a vacuum leak.
To be sure, disconnect the throttle from the throttle tube, and ensure that the cable is routed smoothly to the carb. Start the bike, and blip the throttle by pulling the cable while holding the cable housing. Does it still hang before settling back to idle? If so, a vacuum leak is most likely. You have a few ways available to you to find the leak. One popular way is an unlit propane torch. Start the bike, open the propane valve and aim it around the carb and intake tube. When the idle picks up speed, the propane is being drawn in at the leak. Please be careful.
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Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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02-09-2016, 02:04 PM | #32 |
Join Date: Jan 2016
Location: Mooresville NC
Posts: 2,107
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thank you! no propane tank at the house, so that's probably good for saving me from burning down the place. I'll try the carb spray route.
any idea on the idle adjustment? is it possibly air leak as well? |
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02-09-2016, 03:29 PM | #33 |
Join Date: Jan 2016
Posts: 63
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I use starting fluid
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02-09-2016, 11:52 PM | #34 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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Could be. I'd search for the vacuum leak first, and then reassess.
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Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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02-10-2016, 06:50 PM | #35 |
Join Date: Aug 2015
Posts: 73
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Sports rider, did the aftermarket carburetor increase the speed by any chance? I really would like to know if it did because I have the same carburetor and my jets should be coming in the mail within the next days.
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02-11-2016, 08:40 AM | #36 |
Join Date: Jan 2016
Location: Mooresville NC
Posts: 2,107
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ok....I'm frustrated and demoralized. this thing is really getting to be an emotional issue.
cranked and cranked last night and could barely get the thing to catch and run. I did get it to run on choke giving it a lot of throttle, but would not run on its own. I'm at a loss as to how to move forward on it. you guys know how little I know about carbs. I'm going to check the valves just for peace of mind, but could use some suggestions if anyone has some ideas to troubleshoot. Fishtime9....when I DID get it running the other day on choke, I could immediately tell that it was going to be better. the fuel delivery had it revving all the way to redline. I have no doubt it will get better speeds. of course, the gearing is the real solution there. |
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02-11-2016, 09:58 AM | #37 |
Join Date: Dec 2014
Location: Deerfield Beach FL
Posts: 1,410
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Do you have your air filter connected? Try upping the idle speed screw a little at a time.
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02-11-2016, 10:50 AM | #38 |
Join Date: Mar 2010
Location: Volcano, Ca
Posts: 7,112
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If it's only running on choke, and the carb is set up correctly, you have a fuel delivery problem.
Look to see if there's a bunch of crap in the bottom of your tank with a flashlight and that the fuel line's not kinked or plugged at a filter to the carb. If it's unimpeded (disconnect the line from the carb and open petcock) and it still only runs on choke, something not right in the carb like plugged jets or something. It can be confusing but it's as basic as a tiny toilet.
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"Light a fire for a man, and you heat him for a day. Light a man on fire, and you heat him for the rest of his life." 2007 Suzuki DRZ400S (SM convert) 2009 Q Link XP 200 1967 BSA B25 250cc Starfire 2022 Royal Enfield Interceptor 650 2023 Royal Enfield Scram 411 1948 Royal Enfield Model G 350 |
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02-11-2016, 11:01 AM | #39 | ||
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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Quote:
Quote:
The air filter is required so that excess air flow does not alter the correct air/fuel ratio. Are you using a new fuel filter? New fuel lines? I've found that some of the black rubber China fuel lines can deteriorate and send bits of rubber into the carb. I use snowmobile fuel line, because it's typically clear or blue, and I can see fuel flowing in it, and because it remains flexible in cold weather. I'm betting that there is crud in the slow jet, which is super easy to remove and clean. This is a good time to remove the carb and familiarize yourself. Take lots of pics and show us; several of us are ready to help.
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Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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02-11-2016, 11:01 AM | #40 |
Join Date: Jan 2016
Location: Mooresville NC
Posts: 2,107
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my initial time of having it running on choke, it was with the air box disconnected from the carb.
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02-11-2016, 11:03 AM | #41 | |
Join Date: Jan 2016
Location: Mooresville NC
Posts: 2,107
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Quote:
the jets etc were new. I didn't really check to see if they were blocked for any reason. is it worth taking apart to double check? |
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02-11-2016, 11:03 AM | #42 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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Sport Rider, it looks like you and I posted seconds apart!
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Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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02-11-2016, 11:10 AM | #43 | |
Join Date: Jan 2016
Location: Mooresville NC
Posts: 2,107
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Quote:
as for the needle, I removed the clip and adjusted the e-clip to the second notch. then dropped it back into the slide and installed the pressure clip holding it in. I used the original cap from the other carb rather than taking the cable out of it and installing in the cap that came with the new carb. it was easy to figure out how to attach the throttle to the new slide. Oh...I set the pilot screw at 1 2/3 turns after screwing it in to a stop (lightly). I KNOW this has to be a setup problem. I just don't have experience with them to troubleshoot. Plus I'm impatient, so I hopefully didn't start twisting the idle screw around too much and have it all out of whack. |
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02-11-2016, 11:30 AM | #44 |
Join Date: Aug 2015
Posts: 73
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I suppose you could follow welds process. However, would you really want risk of burning down your house? I suppose that the safest method would be to buy a new carburetor for 30-40$.
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02-11-2016, 11:33 AM | #45 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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Ok, let's make one change at a time, but that's after eliminating fuel delivery. Are you using a fuel filter?
I'd start with the pilot mixture screw backed out 1.5 turns.
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Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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