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cgtech · 03-23-2013, 11:56 PM

black smoke = fuel
grey smoke = oil

check for these- in order of lowest cost and severity.

- oil in airbox
- oil level way too high (caused by unburned fuel in oil)
- compression over 125 minimum
- try an oil change ($)
- yamaha combustion chamber cleaner/ ring free. ($$)
- rebuild ($$$$$$$$$$$$)

Usually on yamahas, compression and power will be fine, but the oil rings get stuck from carbon. sometimes ringfree fuel additive + combustion chamber cleaner will bring smoke to a minimum. sometimes a rebuild is in the cards.

03-23-2013, 11:56 PM	#9
cgtech Over This Interview Is... Join Date: Jun 2012 Location: AZ Posts: 17,449	Re: 2006 G22 Will not start black smoke = fuel grey smoke = oil check for these- in order of lowest cost and severity. - oil in airbox - oil level way too high (caused by unburned fuel in oil) - compression over 125 minimum - try an oil change ($) - yamaha combustion chamber cleaner/ ring free. ($$) - rebuild ($$$$$$$$$$$$) Usually on yamahas, compression and power will be fine, but the oil rings get stuck from carbon. sometimes ringfree fuel additive + combustion chamber cleaner will bring smoke to a minimum. sometimes a rebuild is in the cards.