Question about 2005 Honda CRF 250 R

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When motorcycle warms up it starts smoking

2001 honda xr 250 smokes alot when it warms up runs ok and starts ok

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  • MotoXFreak19 May 11, 2010

    yupp what he said... or if its white smoke its just moisture... prolly just running it out of the motor from the night before... if its always puffing white smoke you got water in the gas or oil.

  • Mark Nichols
    Mark Nichols May 11, 2010

    Is it a 2stroke or a 4stroke engine?

  • Anonymous Mar 17, 2014

    do my rings need replacing if it smokes alot of smoke


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To cure the problem a top end rebuild (bore job, valve job) is called for. Also the bottom end must be flushed several times with solvent then oil to remove the residual sludge that will make the problem repeat itself prematurely. Rings, pistons and cylinders on dirt machines wear out and get excessive clearances causing the oil smoke. I have never seen a "busted" oil ring on an XR.

Posted on Feb 18, 2010

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Id say its time for a new set of piston rings sounds like youv got a busted oil ring

Posted on Mar 04, 2009

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1 Answer

How to fix my smoke belching xr 250r?

sounds like valve seals ! replace them and re lap valves in while your there ! P...

Dec 23, 2013 | 1996 Honda XR 250 R

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Hello, I have a Honda XR250 1990 (europe) Black smoke and licht noise in cilinder, what to do ? Thankx

Did you ever done Decarb for your Motor Cycle ? It is recommended to do a Decarbonisation of Cylinder Head and Replace the liner every 30000 - 40000 Kms .
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need Physical Examination Foe a definite Solution

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Nov 21, 2010 | 1990 Honda XR 250 R

1 Answer

I got blue smoke coming out of my tail pipe on 200 xr honda 4 stoke dirt bike

This is engine oil burning ,I bet it smells oily. The valve guide seals under the rocker cover are worn ,or the piston rings are worn and poss the bore on such a old bike this is common. If you have little money just keep going ,the spark plug will eventually fail, Or you will need to restore your engine with a strip and rebuild.New seals, rings and check bore piston tolerance .

Mar 03, 2010 | 1987 Honda XR 250 R

2 Answers

Spudders in mid range putting out alot of white smoke

White smoke generally indicates that oil is getting into the combustion process. Three possible causes are: a blockage of the crankcase vent, worn piston rings, or worn valve guides and/or seals.
Check the easy thing first: the crankcase vent. Make sure the rubber tube is not kinked or pinched somewhere. Also check that the air filter box doesn't have any water or oil sitting in the bottom (this will block the crankcase vent).
Next, try to determine if the smoke is mostly during acceleration, or deceleration. Smoke while accelerating usually means worn pioston rings, while smoke under deceleration would point to bad valve guides or seals.
Armed with the above information, you may now decide weather or not to teardown the engine - and what to look for if you do.

Jan 04, 2010 | 2001 Honda XR 650 L

1 Answer

So i was riding the bike it start to smoke then lost compression it does start doesnt make noise either its it just rings

The first thing to determine is: was the engine run with insufficient oil in the crankcase? Check the oil level. If the engine was run without enough oil in the crankcase, then you are in for more than just rings. Plan on reboring the cylinder, new piston and rings - and possibly camshaft and rocker arms. A teardown and inspection of the top end of the engine will be needed. If you are lucky, the bottom end will be okay.
If the engine wasn't run without oil, then make sure the valve tappet clearances are set correctly. If not properly adjusted, though it won't cause the engine to smoke, can cause it to lose compression.

Nov 05, 2009 | 1994 Honda XR 250 R

1 Answer

Idle speed engine dies when throttled

It does sound like its getting to much fuel, or the lack of air. Air filter ok? If it is you might need to have a compression check done to see how the piston rings are.

Jul 03, 2009 | 2001 Honda XR 250 R

1 Answer

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Jun 25, 2009 | 1985 Honda XR 250 R

1 Answer

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?

Jun 05, 2009 | 2002 Honda XR 200

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