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my12by60
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« on: June 23, 2011, 06:32:26 PM » |
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I have had my Valkyrie for six years. I have six emissions reports on my desk. In AZ we test hyrdocabrons in ppm and carbon monoxide in %. The maximum ppm allowed for hydrocarbons in 1800 ppm. For my first five emissions reports, hydrocarbons ranged from 150 - 210, bouncing around in that range. This year, hydrocarbons were 980 ppm. The bike still passed with plenty of cushion, but I am curious if the elevated hydrocarbon reading is telling me something. The bike has been running fine and I have been getting north of 35mpg in mixed riding. Maybe the reading was just a fluke? Any thoughts?
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T.P.
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« Reply #1 on: June 23, 2011, 06:40:04 PM » |
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Diff brand of gas?
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"Well you can call me T, or you can call me P, or you can call me T.P. but you doesn't hasta call me Toilet Paper"
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sugerbear
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« Reply #2 on: June 24, 2011, 03:47:56 AM » |
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bike up to operating temp?
as a side note, has it been desmoged? just curious.
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X Ring
Member
Posts: 3626
VRCC #27389, VRCCDS #204
The Landmass Between Mobile And New Orleans
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« Reply #3 on: June 24, 2011, 05:03:29 AM » |
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Ethanol vs. real gas?
Marty
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People are more passionately opposed to wearing fur than leather because it's safer to harass rich women than bikers.  |
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my12by60
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« Reply #4 on: June 24, 2011, 10:56:36 AM » |
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The bike has not been desmogged. I can't recall where I got the gas that was in the tank at the time of the emissions test, although I know it was bought from a "name brand" station here in the Phoenix metro area. Most of my fills are from the Chevron station here in the Phoenix suburb called Fountain Hills.
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sandy
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« Reply #5 on: June 24, 2011, 06:29:57 PM » |
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A jump in HC's shows a rich condition. But the root cause can be complicated. If the carbs are too lean, sometimes a cylinder will miss fire and the unburned fuel will pass out the exhaust. It looks like "Too Rich" but it has what's known as a lean missfire. Things to check: air cleaner condition, hose clamps on the carb intake system, O rings at the cylinder head inlets, and vacuum hoses. If a float is sticking open, one cylinder will be too rich. Same problem for bad plugs or a weak coil (not very likely).
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GOOSE
Member
Posts: 704
D.S. #: 1643
Southwest Virginia
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« Reply #6 on: June 24, 2011, 07:33:54 PM » |
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the ethanol gas has alot to do with it.
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Bobbo
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« Reply #7 on: June 24, 2011, 07:55:27 PM » |
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sandy is correct for the most part, but high HC levels show a rich or lean condition. You need to look at your CO % to determine mixture. High CO measurements mean rich, and low CO means lean. Ethanol in fuel has little effect, and will generally cause a leaner condition due to the small amount of oxygen it contains.
Check your air filter and enrichener (choke), and possibly float level if rich. Look for clogged slow jets or vacuum leaks if lean.
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Farther
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« Reply #8 on: June 24, 2011, 10:10:32 PM » |
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Ethanol in fuel has little effect... I would agree. If an oxygenate has any effect it would probably be to lower hydrocarbon levels in exhaust. |
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Thanks,
~Farther
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sandy
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« Reply #9 on: June 26, 2011, 05:52:39 PM » |
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Where in AZ are you? I live in Mesa. Maybe I can help sort it out. Send me a PM if you'd like. I should be home Wed night or Thursday. Sandy
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Mr.BubblesVRCCDS0008
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« Reply #10 on: June 27, 2011, 12:40:23 AM » |
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Could be better testing equipment. I know where I work (chemical plant) the testing is getting more and more advanced.
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