2005 Honda VT 750 DC Shadow Spirit Logo
R
Randy Halcomb Posted on Feb 07, 2016

Bike started running rough and smoking out of one of the tailpipes. Started while it was at idol.

5 Related Answers

Anonymous

  • 1 Answer
  • Posted on Jan 29, 2009

SOURCE: i have an 85 honda

you have several vacuum hoses this is the ideal place to start.
In particular there is a approx 15mm o/d hose coming of the inlet manifold check it for leaks.
It runs down between the intakae manifold and throttle bodies.

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Ned C Cook

  • 3433 Answers
  • Posted on Jun 05, 2009

SOURCE: theres alot of smoke coming out the exhaust pipe

Sounds like the crank case engine oil level is too high. Ovefilled, Two or 4 stroke?

Anonymous

  • 99 Answers
  • Posted on Aug 04, 2009

SOURCE: starts rough,doesnt want to stay running when it

you definitely have a head problem. either a cracked head, or a blown head gasket. the white smoke is actually the coolant/water leaking into your cylinder and burning. remove the head, or have a tech. remove it, and have it resurfaced and pressure tested at a machine shop. when thats done, you can have it reinstalled with a new gasket, and that will fix your problem. I cant stress enough how important the machine work is...your head is aluminum, and aluminum heads tend to warp if theyre expsed to too much heat.

Anonymous

  • 1752 Answers
  • Posted on Nov 18, 2009

SOURCE: was driving on highway when engine started smoking

It's probably dead, but only a mechanic can tell you for sure.

heimlich

David Belcher

  • 1978 Answers
  • Posted on Apr 02, 2011

SOURCE: THe bike starts and runs

You are dealing with a rich condition when you get the white smoke. If you park the cycle on the side stand , then start it you will get the traditional puff of smoke which goes away after a minute. In your case you have either a sunk float or stuck/dirty/worn float needles. Ethanol fuel is very hard on black plastic floats and has been known to ruin them on a regular basis.The floats and needles have been replaced on all three of my GL1000's. The only proper fix for the condition you describe would be to pull the carburetor rack out the motorcycle, disassemble, clean the carburetors, and replace the both the floats and the float needles. This should restore the GL back to smoke free, except of course when you park it on the side stand.

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Hi there:
Black smoke is caused by excess fuel that has entered the cylinder area and cannot be burned completely. Another term for excess fuel is "running rich." Poor fuel mileage is also a common complaint when black smoke comes out of the tailpipe. Black smoke out the tailpipe is the least cause for alarm. Excess fuel will usually effect engine performance, reduce fuel economy, and produce a fuel odor.

How did the fuel get into the cylinder in the first place? Some of the causes of excess fuel are a carburetor that is out of adjustment, a faulty fuel pump, a leaky fuel injector, or a faulty engine computer or computer sensor. If black smoke is present, check the engine oil as in the white smoke example to make sure excess fuel has not contaminated it. Do not start the engine if a heavy, raw fuel smell can be detected in the engine oil. Call your mechanic and advise him of what you have found.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

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