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Runs Better With Choke Out (Read 11 times)

dubbington Ex Member	Runs Better With Choke Out 05/07/07 at 09:11:31 First Drive after almost 20 years of sitting....'86 ls650 Cleaned tank, brakes, carb, oil Runs great just idles rough. Runs better when choke is out. any ideas? Havent got a manual yet, how do I increase the idle? thanks Rc
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Savage_Greg Serious Thumper Alliance Member Offline Don't go around your ass to reach your elbow... Posts: 7844 SW Washington State Gender:	Re: Runs Better With Choke Out Reply #1 - 05/07/07 at 10:45:28 Did you get it fully warmed up and take a drive? You cleaned the carb? If yes and yes, then it sounds like you have an air leak.
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bduff YaBB Newbies Offline Posts: 30	Re: Runs Better With Choke Out Reply #2 - 05/07/07 at 10:56:21 Sounds like you need to clean the carb again?
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Max_Morley

Serious Thumper

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LT650 Luxury Touring
& sidecar rig

Posts: 1490
Moses Lake. WA
Gender: male

Re: Runs Better With Choke Out
Reply #3 - 05/07/07 at 18:30:22

The choke isn't the flapper valve in the top or inlet of the caruretor like you may be used to. Think of it as a small carburetor that is parallel to the main one, that allows some air and extra fuel around the slide to aid in starting and provide a faster cold engine idle speed. If it runs better on, you are very lean and probably have partially plugged pilot or main jets. Could also be the slide is stuck or not working so the only repsonse you get is the poor running due to some extra air with no fuel. In a CV carb the throttle simply requests more RPM and the slide actually opens the air passage and the varius jets/needles control the fuel to with it. Max

Max at Thumper Acres. '96 Savage bagger, '03 Savage w/Cozy sidecar for wifeni.

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Dynobob Serious Thumper Offline 2003 LS650 (with Supertrapp) Posts: 634 Northern Virginia Gender:	Re: Runs Better With Choke Out Reply #4 - 05/07/07 at 18:39:27 Your carb bowl and jets are full of varnish. Gas turns to varnish when it sits unused. Your gas tank could be full of junk too.
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Savage_Greg Serious Thumper Alliance Member Offline Don't go around your ass to reach your elbow... Posts: 7844 SW Washington State Gender:	Re: Runs Better With Choke Out Reply #5 - 05/08/07 at 06:19:44 I like the "parallel universe" comparison Pretty even consensus....air leak, lean, clogged jets. All mean that the air to fuel mix is wrong. So where'd the Dub go?
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dubbington Ex Member	Re: Runs Better With Choke Out Reply #6 - 05/08/07 at 07:46:38 I cleaned the tank and took the carb off and drained the bowl and checked the floats but that was it. I didnt take the carb apart cuz the bike only had 112 orig miles. Ill drive it a lil more and see.
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mornhm - FSO Serious Thumper Offline HMMM Posts: 1105 Gender:	Re: Runs Better With Choke Out Reply #7 - 05/08/07 at 08:09:20 If you're not going to take the carbs apart to clean them, you might want to consider a gas additive such as seafoam that will "melt" the varnish. There are directions on the product for how to mix it with gas. Run a few tanks and see what happens.
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KenGLong Senior Member Alliance Member Offline 2002 Savage Posts: 297 Albuquerque, NM Gender:	Re: Runs Better With Choke Out Reply #8 - 05/08/07 at 08:11:51 Put a half a can of Seafoam in a full tank then run a full tank of pure gasoline then another half can of Seafoam in a full tank. If that fixes it, great. If not, time to remove the carb for complete disassembly and cleaning. Ken
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