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Buell Motorcycle Forum » XBoard » Buell XBoard Archives » Archive through April 13, 2009 » Valve guide seals? « Previous Next »

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Jonnyrotton
Posted on Monday, April 06, 2009 - 03:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

My 05 xb9sx with 30,000 miles has developed a smoking problem at start up. However it seems to smoke much more if the bike has been running then started within 5 minutes of being run. It doesn't seem to smoke while running unless i whack open the throttle under load. It seems odd to me that it would smoke more after only sitting for a few seconds or minutes than after sitting all night.
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Iamarchangel
Posted on Monday, April 06, 2009 - 04:02 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Black smoke = fuel.

White smoke = oil.

Just a rough rule.
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Saratoga
Posted on Monday, April 06, 2009 - 06:21 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Valve guides tend to smoke more at idle and part throttle because of the vacuum created by the throttle being closed and literally sucking oil past the intake valve guides.

(Message edited by saratoga on April 06, 2009)
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Jonnyrotton
Posted on Monday, April 06, 2009 - 09:13 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Its definitely white smoke and it stinks of burning oil all the time whether it is smoking or not.
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