Question about 2005 Honda CR 125 R

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Spark keeps fouling but no clue why

The spark blug keeps fouling but the oil mixer is fine just the spark plug gets real oily and only funs for bout 20 then fouls

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Are you losing gear oil.
When the crankshaft seal leaks, oil from the gearbox is sucked into the crankcase, and this can foul the plug.
Also check the plug gap, most guys set the gap too small. It should be 0,7mmto 0,8mm. The plug should be a B9 EG, or equivilant.
Now, you can also change the plug cap to a type that has a built in resistor, this also helps with plug life.
Note that 2 strokes use plugs way more than 4 strokes, and you should replace the plug every 15-20 hours to keep your riding pleasant.
Good Bike you have there
Cheers
Jon

Posted on Feb 16, 2009

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Posted on Jan 02, 2017

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2007 ford 4.0 v6 why are all my spark plugdls on passenger side oil soaked but drivers side is fine doesn't smoke did compression test all good not a blown intake gasket had it checked anyone know?


Hi Josh:
I'd put fresh plugs in it and drive it for a week, then check the plugs.
Sometimes you will get high compression readings that are not valid because the rings are soaked in oil so they think they are sealed when they are not.
With the engine off, you could try removing the oil filler cap when the engine is hot, then restart it. A little vapour is OK, a lot indicates bad valve guides, head gasket,or ring blowby.
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No, oil is fouling from piston rings leaking a little. Clean it up or install new one. Pull and check after a few days . if its real oily again then you have a problem if not your ok.
this is really a normal condition on old plugs not changed. you only have one cyl doing it so you should be ok

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1 Answer

Keeps fouling plugs


If the black deposits on the sparkplug are dry and fluffy then your problem will more than likely be a blocked or restricted airfilter. Your airfilter should be the sponge type, wash it in a soap water solution, dry it thoroughly then apply clean engine oil to the filter, squeeze it through then squeeze out the excess in a dry clean cloth. This will leave a fine residue of oil to trap any particles of dust. A heavy residue of oil in the filter will cause the problems you arte experiencing.
If the black deposits are wet and oily then either the sump is overfilled or the piston rings and cylinder are worn.

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I put too much oil in 06 yamaha r6 raven and its not starting


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