Question about 2003 Yamaha Royal Star Venture

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Wont idle bike ran fine two weeks ago now it wont idle unless choke is engageg. Drained tank thought had water put in new gas and additative no luck. stick rag over #4 carb and it will idle. REPALCED THE PLUGS. NO LUCK

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Sounds like the idle circuit in #4 carb is plugged up

Posted on Jun 29, 2009

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2000 Yamaha WR400 wont run with choke off.


Hi, Anonymous and the usual suspects are:
1. Fuel cap or fuel tank is not venting properly.
2. Fuel filter clogged.
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4. Float needle and seat sticking.
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My 05 VTX 1300R just sat and was only ran 1 time in almost 2 years w/ Stabil in the gas.It ran fine last time I rode it, fall of 2009. Statred today and acts like it is starving for fuel, will not idle off...


Recheck fuel flow wth float bowl removed allow floats to hang free. And fuel will flow out, remove float needle check for sticking in seating, remove secondary jet and clean with fine wire to remove fuel contamination,also main jet, if all else fails find a used carburettor to replace old one

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You have a gummed up mainjet. Always store a gas engine with Staybul gas additive to avoid this problem in the future. Now, on to the current problem. Since the bike will at least idle your in luck. Just go down to an auto parts store and get a can of Sea Foam. I usually find it at NAPA it's a white can that looks like it came from a gas station in the 1940's Because it did. Mechanics have been useing it for years. Anyway, dump about half the can in the tank with a couple gallons of gas and fire it up. Let it idle a long time. Then start trying to ride it. You may have to let it set over night if it's really gummed up but it will clean it out. Easy fix, and you can leave it in with no problems. Happy motoring.

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Won't idle without choke


The pilot jet controls the air/gas fuel mix at idle . If the jet gets plugged up not enough gas gets to the emgine at idle. You will need to remove the carbs and float bowls and clean them, paying special attention to the pilot valve. Count the number of turns to remove the pilot screw and replace the same number of turns then turn counter clockwise 1/2 turn.

A “very helpful” rating for this answer? Thanks!

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FXR suzuki 150 will idle but wont rev


i had the same problem ! i dont know how but there was water mxit in my tank and i dumpd the fuel then it was fine

Mar 16, 2009 | 2001 Suzuki FXR 150

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Bike wont idle and power constantly dieing and recovering


check to see if you have gas in the oil from a carb leaking down which will cause the idle speed to drop when motor warms up.pick up idle run for awhile then plugs foul.like you said a carby problem.

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1 Answer

Motor bike wont rev above idle weth choke on


This to me sounds like you need a carb cleaning. If you have let the bike sit for an extended time the carberators maybe clogged or gummed up. This has to do with the new gas that is out there now. It is cheap and with the introduction of Ethanol alcohol now it is even worse on being stable for long periods of time. I have seen fuel go bad in as little as 3 weeks.. One quick check you can do is open you fuel tank and smell the fuel. IF it smells like varnish it is probably bad. You can drain the tank and add new fuel and that should solve your problem. Keep in mind, that the carbs need to be drained as well to get the old fuel out of there also. Make sure you have a battery charger going when you start crankin that puppy, because you will need lots of extra juice to get that baby to fire up. If it is starting now and runs on choke, that means your idle jets are clogged. Best repair is to remove carbs and clean idle jet. Unless it is fuel injected.
Let me know how that goes and we can proceed from this point. I am a certified mechanic from MMI as well as a HDTV GURU. Smiles. have a good one.

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