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post #1 of 4 (permalink) Old 11-18-2008, 10:05 AM Thread Starter
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1986 Phazer Problem

The machine starts and initially runs fine. Once it is warmed up it only runs on one cylinder. I had a look at the plugs and one looks really oily and one looks really dry. Does anyone have an idea why I would be experiencing this problem?

Thanks in advance.

1986 Yamaha Phazer
1988 Yamaha Bravo
1990 Yamaha Phazer II
1992 Yamaha Phazer II
1996 Yamaha VMAX 500XT
rippintheyammi is offline  
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post #2 of 4 (permalink) Old 11-19-2008, 07:19 PM
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Check for fuel flow and see if the dry carb is sucking any air. Id start there no fuel well check lines and fuel pump. Not sucking air well maybe rings pls dont quote me on that or could be base gaskets got a hole in it, Had an 86 that had that problem was sucking air through the base not the carb.
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post #3 of 4 (permalink) Old 11-25-2008, 12:35 PM
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i had the same problem with my 85 i just put a new motor in it and it turned out to be the choke was sticking on the one side
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post #4 of 4 (permalink) Old 11-25-2008, 01:22 PM
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Quote:
Originally Posted by rippintheyammi View Post
The machine starts and initially runs fine. Once it is warmed up it only runs on one cylinder. I had a look at the plugs and one looks really oily and one looks really dry. Does anyone have an idea why I would be experiencing this problem?

Thanks in advance.
i'd try the other things that ppl have told you first but i had a colt that did that and it had a blown head gasket so was not sparking on one cylinder after it got work check it with a spark tester and new plugs
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