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Stuck Idle Mixture Screw (Read 37 times)

Dynobob

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2003 LS650 (with
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Re: Stuck Idle Mixture Screw
Reply #15 - 01/20/06 at 12:17:52

slavy wrote on 12/31/69 at 16:00:01:

Have WD40 on hand. When You get everythind pretty hot, You spray a little WD40 around the screw and try JENTLY to move the screw left, and right, and left....

Even better than WD40 is PB Blaster from the auto parts. Heat from a propane torch might help. Make sure there's no gaskets or seals in the vicinity. Remember that gasoline is highly volitile / flammable.

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BS37066 Ex Member	Re: Stuck Idle Mixture Screw Reply #16 - 01/20/06 at 13:52:14 Call a machine shop.
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SeeAPierce

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Re: Stuck Idle Mixture Screw
Reply #17 - 01/20/06 at 16:33:12

My experience with machine shops and carbs is they generally say "buy a new carb". There are two "Carb specific" shops I know of, but I think they might be pretty pricey. And the bike is really running well so I don't know that I'm up for the $$. I just hate having anything "stuck".

BS37066 wrote on 12/31/69 at 16:00:01:

Call a machine shop.

'06 S40 green: sporty muff & 10 degree adapter 155 main jet, 1/2 white spacer, open filter, bar end turn signals

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Steve530

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Re: Stuck Idle Mixture Screw
Reply #18 - 01/22/06 at 08:17:51

slavy wrote on 12/31/69 at 16:00:01:

You can try something , that has worked for me.
Pull the carb off, drain the gas and let it sit a little so there is nothing to spill. Take a propane torch / a little pencil torch is better, because You can not overdo it/ and heat up the carb. body, where the pilot screw is threaded. You might have a little burning gas, but don't worry- nothing dangerous. Have WD40 on hand. When You get everythind pretty hot, You spray a little WD40 around the screw and try JENTLY to move the screw left, and right, and left........,When it starts to move, every time You go a little bit more to the left. Once You have the screw out, make sure You cut and shape the slot , so this doesn't happen again.

That's a good idea, Slavy. Have you actually done this?

Steve

'97 Black / 1/2 white spacer
155 main jet / 55 pilot jet / Dyna muffler
snorkel removed / K&N drop in / seat raised
Slipstreamer SS30 windshield

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slavy Serious Thumper Offline smart cars for stupid people Posts: 710 Phoenix, Arizona Gender:	Re: Stuck Idle Mixture Screw Reply #19 - 01/22/06 at 10:11:34 I worked like a mechanic in a mc dealership and I have done it many times with seized pilot screws and pilot jets. In many years only once aI could not extract a pilot jet, but it was a 70's bike and everything was pretty badly messed up. I ended up cleaning the jet without removing it .
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Steve530 Senior Member 2005 No Login Offline Posts: 452 Knoxville, TN Gender:	Re: Stuck Idle Mixture Screw Reply #20 - 01/22/06 at 11:03:52 Thanks for the reply. I appreciate the suggestion based on your experience. I may try this if all else fails. Seems there would be a good chance for ireversible damage, though. Steve
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slavy

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Re: Stuck Idle Mixture Screw
Reply #21 - 01/23/06 at 15:48:24

There is no irrevercible dammage here. I did not suggest to blow a hole in the carb. This is metal, so it will heat-up a lot begfore you can hurt something. The mass of the place, where is the pilot screw is a lot smaller than the mass of the main carb body, so the carb will stay a lot cooler than the heated place. It is very hard to mess up. Just don't use a cutting torch.

The arificial intelligence is no match for the natural stupidity

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