Question about 2001 Yamaha XVS 125 Dragster

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I have a 2002 Yamaha xv250 v twin. One of the exhausts is blowing blue smoke. Does this mean engine oil is being burnt in the cyclinder. I want to being able to fix this myself. What should I do?

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Ditto, as Laddie22 says I'd get a mechanic to have a look, it might just be a burn't valve or an oil seal but you might just start something you can't finish and if you take it apart you sometimes find garages get a bit funny finishing a job that someone else has started! If you've never done anything like this before you are taking on quite a big job - no offence, but I'd let an expert have a look!

Posted on Aug 10, 2010

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It could either be engine oil or excess fuel. My best bet is oil.

I would suggest getting an experienced mechanic, motor or motorbike to have a look. Heads must come off. Sleeve must be inspected for cracks and wear. Oil and pressure rings must be replaced and new gasket must be put in for head. If the pistons are worn it sometimes pay to buy pistons with rings allready fitted at reasonable price. If you start this yourself. see it through,

Posted on May 31, 2010

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Posted on Jan 02, 2017

tellme2
  • 137 Answers

SOURCE: very heavy smoke from exhaust of Yamaha Virago

give the air filter a blow out m8,, and change the plugs to a hotter grade,, ie if u have ngk b8es or summat try b9,,that type of thing,

Posted on Apr 10, 2009

  • 6 Answers

SOURCE: engine smokes shuts off blowing oil out exhaust

Is it overfilled on oil? Do you no the correct way to check the oil level?

Posted on May 08, 2010

OzMan59
  • 91 Answers

SOURCE: the engine oil is leaking

Hello,

I have seen this problem on quite a few bikes, but not on yours.

Several things can cause this issue; dirty air filters, bad hoses, overfilled crankcase, rocker box gaskets, and other engine gaskets.

Maybe this info will give you a place to start.

Regards,

Oz

Posted on Jan 10, 2011

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Hi, Quentin your instrument gauges and lights can alert you to most electrical and engine issues they can not warn you about failed engine gaskets or seals so your engine has to resort to old fashion alert methods of colored "SMOKE SIGNALS" here is a breakdown of their meaning:
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1. COLORLESS OR SLIGHTLY BLUE SMOKE on start-up means your air/fuel mixture is at the right composition and everything is well burnt in your combustion chamber.
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Hi, Dwtlvn your instrument gauges and lights can alert you to most electrical and engine issues they can not warn you about failed engine gaskets or seals so your engine has to resort to old fashion alert methods of colored "SMOKE SIGNALS" here is a breakdown of their meaning:
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