Question about Honda CR 125 R Motorcycles
White smoke out of exhaust
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Posted on Jan 02, 2017
SOURCE: white smoke coming from exhaust
White smoke could indicate coolant in the combustion chamber. Not likely if you have an air-cooled bike. It could also mean that you are running in a cold climate, if the temp is around 20 or less I would call this normal.
If your bike is water cooled I would keep a close eye on your coolant level and oil level. A blown head gasket could allow water to get into the combustion chamber (causing the smoke) or mix with the oil (even worse). If you notice it using coolant I would have it checked out by a mechanic. If you want to check it yourself, do a compression check on both cylinders. If one is rather low, there is your problem.
Posted on Jan 12, 2009
SOURCE: white smoke
Are you sure the smoke is white? White smoke is usually caused by antifreeze burning.(This could be a head gasket)
If the smoke is actually light gray it is oil burning.(This would be rings or valve seals)
If it smokes mostly on startup and then stops when it warms up (It could be a worn valve guide or deteriorated valve guide seal (or possibly several) allowing a tiny amount of oil into one or more cylinders).
If it smokes mostly when you are cornering (It could be too much oil in the crankcase).
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Posted on May 19, 2009
Continuous or just for the 5-10 seconds.
If continuous you may have oil seeping past your pistons oil rings or valve guides oil seals.
Check your spark plug see if they are fouled badly (covered heavily and oily) or just covered by oil and sooth lightly.
If 5-10 sec it is normal as the engine is heating up there are normally a little oil seeping past the seals.
Posted on Apr 10, 2010
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