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blowing smoke out pipe

This is a discussion on blowing smoke out pipe within the Yamaha YFM660R Raptor (2001-2005) forums, part of the Performance /Technical category; i was wondering y my rap tends to blow out like blue and black smoke out the pipe, althou i have been doing wheelies latly ...


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Old 07-20-2003, 11:24 AM   #1
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i was wondering y my rap tends to blow out like blue and black smoke out the pipe, althou i have been doing wheelies latly so could it be it just like flooding
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Old 07-20-2003, 11:29 AM   #2
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Black smoke means you are rich, blue smoke means you are burning oil though
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Old 07-20-2003, 11:30 AM   #3
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Have you recently rejetted? Mine did this when I was jetted really rich. I then adjusted my jetting, did my plug check and that was perfect so I left it Now there is no more smoke
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Old 07-20-2003, 10:37 PM   #4
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how dod you do a plug check? i heard wide open in 4th gear.
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Old 07-21-2003, 09:04 AM   #5
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warm it up, get on an open stretch, run it full throttle (doesn't matter what gear), while at full throttle pull in the clutch and kill the engine, come to a stop and pull the spark plug. Look at the electrode, light brown means you're good, whitish means you're lean and black means you're rich.
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