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Main : Misc : Forum Carbon build up

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Carbon build up
Carbon build upPopular
SubmitterholeshotMore Photos from holeshot   Last Update2004/1/9 10:14    Tell a friendTell a friend
Hits2723  Comments4    0.00 (0 votes)0.00 (0 votes)
Just pulled it out of old head.Never seen one this bad (its a GMH bit)

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Poster Thread
holeshot
Posted: 2004/1/9 10:17  Updated: 2004/1/9 10:17
Home away from home
Joined: 2003/4/29
From: GOLD COAST AUZ
Posts: 360
 Re: Carbon build up

Poster Thread
ddgonzal
Posted: 2004/1/9 18:14  Updated: 2004/1/9 18:14
Moderator
Joined: 2001/5/3
From: 48 North
Posts: 31630
 Re: Carbon build up
Yep, used to see a lot of these when the user didn't change the oil.

Poster Thread
Dodgeman
Posted: 2004/1/9 21:48  Updated: 2004/1/9 21:48
No life (a.k.a. DattoMaster)
Joined: 2003/6/27
From: Southern Tablelands N.S.W. Australia
Posts: 8287
 Re: Carbon build up
If thats an inlet valve [& i suspect it is] the carbon is likely to be from oil leaking past the valve guide.

Poster Thread
Cable_Tie
Posted: 2004/7/1 0:41  Updated: 2004/7/1 0:41
Home away from home
Joined: 2004/6/4
From: Brisbane, Australia
Posts: 770
 Re: Carbon build up
I'm going with the cam not being advanced enough causing exhaust gases getting pushed trough the inlet valve. Problem on pollution controlled engines.