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Old 04-11-2009, 05:08 PM   #1
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Gas Smell in Oil

Changed the oil today and it had a slight smell of gas. What are the usual suspects for fuel in oil?
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Old 04-11-2009, 05:23 PM   #2
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a leaking injector or carburetor, or a pcv system or evaporative system, depending on the bike, that's flooding.
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Old 04-11-2009, 05:56 PM   #3
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running rich. power commander? black soot on tail pipe?
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Old 04-11-2009, 07:10 PM   #4
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Clogged air filter, running rich from PCIII improperly set, leaking injector.
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Old 04-11-2009, 08:54 PM   #5
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Originally Posted by witchdoctor575 View Post
running rich. power commander? black soot on tail pipe?
Yes, on the inside of the pipe there was a good amount of black. i noticed this when repacking the exhaust last night.


not sure if this could have an effect but when i first got the yoshi i took the baffle out, i know dumb, i reinstalled a baffle last night. it could be part of the issue, but it has been like that for over a year and a half and this is the first time i have noticed the smell after changing my oil many times.
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Last edited by Pyrofallout; 04-11-2009 at 08:59 PM.
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Old 04-11-2009, 08:57 PM   #6
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Quote:
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Clogged air filter, running rich from PCIII improperly set, leaking injector.
air filter was cleaned and recharged less than 1k miles ago, no PC3, running yoshi slip on & k/n filter, injectors are factory, bike has 16.7k miles.

i haven't noticed any losses in power or anything, just smelled like a hint of gas in the oil.

thanks for the suggestions everyone!
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Old 04-11-2009, 09:10 PM   #7
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prolly running a tad rich i always smelled fuel in the oil of my rc51, but I made it run slightly rich to help keep operating temps down and to compensate for running a fully wrapped exhaust. has fuel mileage changed for the worse? are your plugs wet? is your oil level rising in between changes? if none of these symptoms I personally would not worry. checking your plugs would be the fastest and easiest test to see if there are any variance between cylinders combustion and a possible problem.
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Old 04-11-2009, 09:11 PM   #8
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p.s. throw that fuggin K&N in the garbage and get a factory filter. they flow more than enough to feed that bike.
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Old 04-11-2009, 09:14 PM   #9
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Quote:
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prolly running a tad rich i always smelled fuel in the oil of my rc51, but I made it run slightly rich to help keep operating temps down and to compensate for running a fully wrapped exhaust. has fuel mileage changed for the worse? are your plugs wet? is your oil level rising in between changes? if none of these symptoms I personally would not worry. checking your plugs would be the fastest and easiest test to see if there are any variance between cylinders combustion and a possible problem.
I will pull the plugs when I get a chance. Just changed them maybe 3k miles ago. Oil level was too high. It seemed slightly too viscous to me but I also was riding for a short stint prior to changing and the oil was pretty hot, usually I just warm it up a tad and drain, so that may have been why I thought it was too liquidy.
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Old 04-11-2009, 09:15 PM   #10
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p.s. throw that fuggin K&N in the garbage and get a factory filter. they flow more than enough to feed that bike.
likely switching to a bmc in the future.
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Old 04-11-2009, 09:19 PM   #11
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Quote:
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likely switching to a bmc in the future.
good man. i know in the rc51, installing a k&n actually reduced HP. (actual dyno proof on record) I can't imagine it would help any bike really. It might actually be doing more harm than good. they are even a no-no in diesels. they will dust a diesel in a short time.
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Old 04-11-2009, 09:22 PM   #12
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Old 04-11-2009, 09:24 PM   #13
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not that it matters but a certain person in this thread tld me that a K7N will hurt more then help. He order me a stock filter for the zx7
really....didn't I just say the same thing?
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Old 04-12-2009, 09:25 PM   #14
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