Question about 2000 Honda Valkyrie Interstate

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Only running on 3 cylinders, nrew plug and clean

Only running on 3 cylinders, new plug and clean gas. One pipe hot and one cold

Ideas????

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Bike has probably been sitting for awhile. Carb jets probably plugged up. This is usually whats wrong. I have a 1999 and had a similar problem. It required removing the carbs and cleaning them. This is NOT a fun job.

Posted on Oct 13, 2009

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Take the plus out and leave them in the boots lay them on a ground (bolt or the frame etc..) to make sure that there is no fire

Posted on Jun 23, 2009

  • thomas foster
    thomas foster Jun 24, 2009

    if you do this test you can eliminate spark being a problem if you have an eletrical problem you should get some kind of code unless you want to take it to a dealer you need to go by pocess of elimination since every mech in the world would do the same thing i was trying to tell you to do i guess i was wrong......



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2 Answers

Fuel in back bowl but exhaust not getting hot


Hi Jeff:
Gotta love a puzzle.
The black smoke is an indication of too rich a mixture.
What did the plug from the back cylinder look like? If fouled and wet then too rich. If dry then no fuel.
You're close to solving it. The plugs should tell you what you need to know. You could also install new plugs for a "fresh start" to the diagnostic.
Reply as a COMMENT to this post for more input.
Cheers.

Feb 09, 2016 | GAS Motorcycles

1 Answer

What is the spark plug gap why is 1 of my exhust pipe hot and the other is not


Dave:
Your #1 cylinder ( the front cylinder) is not firing. It could be that the spark plug is fouled or improperly gapped, or the carburetor is not delivering gas to the cylinder. pull both spark plugs Clean the plugs and gap them. The gap should be about 0.035 In. (thirty five thousandths). Reconnect the wires to the spark plugs. Lay the spark plugs against the outside of the cylinders with the metal part of the spark plug body touching the cylinder (creating the ground part of the circuit). push the starter and look for spark at both spark plugs. If you have spark at both plugs, put them back in and start the bike and check the exhaust pipes to see if they are both hot. If one is still cold, the carburetor for that cylinder is not delivering gas. Could be a kinked or clogged fuel line, disconnect the fuel line from that carburetor and see if gasoline flows out. If gas flows out, the carburetor needs to be tuned or removed and cleaned.

Jul 12, 2015 | 1998 Suzuki VZ 800 Marauder

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Yzf 600 cylinders 2 3 not firing


carbs need to be torn down and cleaned or jets ajusted--ur hand acts like a choke drawing more gas

Feb 13, 2014 | Yamaha YZF 600 R thunder cat Motorcycles

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I have a 1998 royal star 1294cc 3 of the exhaust pipes get and one is cold


The cylinder of the cold pipe isn't firing, Check the spark plug and the spark plug gap. Also check the plug wire for that cylinder.

Dec 29, 2012 | Motorcycles

2 Answers

On my pipes one side is hot and the other is cold


Check the pipe right where they come out of the heads. It depends on what type of exhaust system you have on your Road King. If the stock exhaust is on the bike, the rear cylinder exhaust is directed to both mufflers. With the exhaust from the front and part of the exhaust from the rear cylinders going to the right side muffler, it gets more exhaust than the left side and runs hotter. Like I said, check the temp of the exhaust pipes at the cylinder heads. If one of them is cold, that cylinder is not firing. As long as both of the pipes are hot there, you're fine. Just ride the bike and have fun.

Ride Safe.
Stevev

Apr 09, 2011 | 2000 Harley Davidson FLHR-FLHRI Road king

3 Answers

Front cylinder misfire at idle,then raise rpm's to 2000 area an it comes in an out popping thru exhaust.front cylinder cold to the touch when rear is hot, till it runs a couple of min. New plugs, good...


I am not sure if the bike is a 650 or 1100 but in either case it sounds like a fuel issue or and air leak. When the carbs were off for re-jetting did they get cleaned? The slow circuit controls to about 2000 rpm and it sounds similar to your problem.

The first thing to look at is the carb synchronization. If the front cylinder is lagging, it can give the same symptoms. I do not think that the exhaust is a factor because the front is cold when running.

Spray some WD 40 at all the intake manifold area when the bike is running and see if the idle changes. the idle will change and push some smoke out of the exhast if the intake is leaking.

If both of these check good I would pull the carbs back off and clean the slow circuits out completely. This is delicate work and shoud be done by and experienced tech.

If I can help some more just send message.

I hope that his helps. Steve

Jan 18, 2011 | 2004 Yamaha V Star Classic

1 Answer

It cranks good...idles good...will not take gas...i cleaned the carbs...and put new plugs in...it acts like the right cylinder is not firing properly...it's exhaust is almost cold ...the right cylinder...


cylinder head is getting red hot because it's running lean. Check to see if there is an aftermarket fuel filter in the fuel line somewhere, also the float hight in the carbs are set right. Also drain the fuel tank and apply fresh fuel. Check to see if the tank is rusted, also if it has a device at the bottom of the gas tank that turns on and shuts off the fuel (petcock) it's possible it has a fuel flilter in there as well.

*Note if you take the petcock off you will more than likely have to replace agasket for it. Given the age of the bike it will be hard to find a gasket.

Jan 03, 2011 | 1977 Honda Cb 400 F

1 Answer

1982 GS850 Missing and Hesitation


fuel flow to cold pipe cylinder may be stopped with trash or sticky float.Resistor in plug wire for the one not firing could be bad. Try changing coil from one that is firing to the one thats not,see if that pipe gets hot or does the same thing still happen. coil ,plug wire, or fuel would be my primary focus.

Apr 20, 2010 | 1982 Suzuki GS 650 GT

1 Answer

#2 cylinder not burning on '88 Katana


looks like your carbs need to come apart and be cleaned.
also replace the hoses so you wont have any vacuume or fuel leaks.

8c2dab7.jpg

Nov 17, 2008 | 1988 Suzuki GSX 600 F (Katana)

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