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Old 06-03-2013, 08:25 PM   #1
Willie B OP
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Pure Gas

A friend who has a '04 1150 GS and myself riding my '09 1200 GS filled our bikes with ethanol free gasoline today and rode approximately 140 miles. I immediately noticed my bike not popping on decal and the throttle response was much better. It also seemed to smooth up the rough idle. I can't believe how pump gas makes the bike run so crappy. Wow! Has anyone else tried straight non ethanol gasoline in their bike?
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Old 06-03-2013, 08:29 PM   #2
Ravenslair
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There are fewer ethanol-free gas stations in California than there were California Condors in the wild when they rounded them up in the 80's
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Old 06-03-2013, 08:35 PM   #3
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Listed by state :

http://www.pure-gas.org/station?station_id=4903
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Old 06-03-2013, 08:37 PM   #4
Willie B OP
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I went to the distributor and conned them into letting us fill up. I'm heading back later in the week with numerous dump cans in tow. They have a 300 gallon minimum, but would make an exception if I bought 50 gallons at a time.
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Old 06-03-2013, 09:08 PM   #5
jimbeauxk
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I work at a refinery and only use clear gas in my GSA. But I still have a healthy popping on deceleration, I don't think your conclusion is completely justified.
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Old 06-03-2013, 09:38 PM   #6
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Quote:
Originally Posted by jimbeauxk View Post
I work at a refinery and only use clear gas in my GSA. But I still have a healthy popping on deceleration, I don't think your conclusion is completely justified.
Not what you could call a double blind test. They filled with the expectation of a difference. Perception is reality
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Old 06-03-2013, 10:32 PM   #7
tjt94
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We found that last summer in Mexico. Pemex is really good fuel. I was getting fuel economy in the high 40's on my 01 GS at above 90 mph speeds. In the US I might get in the high 30's at similar speeds and load. Guatemala, Honduras, and Belize were a different matter for fuel though. Lots of pinging even on premium. It went away on the first tank of Pemex.
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Old 06-04-2013, 03:32 AM   #8
billdonna
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Originally Posted by pizzaboy View Post

Interesting link. In Canada I just go to a Shell station located all over the country. No ethanol when you fill with premium.

I'm planning a cross US trip to the west coast this July. Is there a national chain of service stations, like Shell in Canada, that supply ethanol free gas so I don't have to hunt down one with a computer while going cross country? Thanks for any info!
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Old 06-04-2013, 03:43 AM   #9
roger 04 rt
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Quote:
Originally Posted by jimbeauxk View Post
I work at a refinery and only use clear gas in my GSA. But I still have a healthy popping on deceleration, I don't think your conclusion is completely justified.
I'm with you, popping equals unburned fuel in the exhaust (why is it there?) plus unconsumed oxygen (how did it get there?). Sounds like deceleration misfire leading to unburned fuel in the exhaust system. Maybe he can figure that out.

Perhaps pure-gas isn't popping because it lack ethanol as an oxygenate. I know popping is not uncommon but misfires, even on decel, can add a lot of heat to the catalytic converter and cause damage.

If you decelerate at part throttle, the ECU does go open loop and lean out the mixture--too lean to combust? Aftermarket exhaust allowing air reversion into the system?
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Old 06-04-2013, 03:46 AM   #10
marty hill
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No national chain that I'm aware of. I've been using pure gas for about 6k now, bring it home in 5 gal. containers. Pain in the rear but moto likes it. When on the road I carry a list of the states I'm riding in. Nor cal has a couple/will try one of them next week.
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Old 06-04-2013, 08:16 AM   #11
WindSailor
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You can click on the "POI file" link (at pure-gas.org) and download a csv file to which you can insert (those points of interest) into your GPS; that shows all of the ethanol free gas stations listed in their web site on your GPS.
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Old 06-04-2013, 08:20 AM   #12
dirty_t
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On another bike I had the popping on decel was caused by something called a PAIR valve - some sort of EPA-mandated thing. Aftermarket vendors sold PAIR blockoff plates which you could use to plug the resulting hole when you pulled off the PAIR valves (one per head).

Once I got rid of the PAIR valves the popping was gone.

Anyone know if the GS has these?
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Old 06-04-2013, 10:56 AM   #13
sk8rdi16
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Quote:
Originally Posted by WindSailor View Post
You can click on the "POI file" link (at pure-gas.org) and download a csv file to which you can insert (those points of interest) into your GPS; that shows all of the ethanol free gas stations listed in their web site on your GPS.
They've also got a handy iPhone app I've been using for a while.
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Old 06-04-2013, 11:35 AM   #14
Willie B OP
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I spoke with a buddy of mine who owns the local Ducati franchise about his thoughts of running the pure gas and the popping on decal. His assertion was the straight gas may be burning quicker and having less raw gasoline entering the exhaust stream. In my previous post, I wasn't talking about partial throttle chop, but complete throttle closure on deceleration. Considering I have several Ducatis and their expanding tank issue is supposed to be caused by ethanol, I'm going to start buying several dump cans at a time and keep around.
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Old 06-04-2013, 11:56 AM   #15
RomaDakota
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Although I have ethanol free close by, I have several boat fuel tanks I fill occasionally. Quick connects, some hose, old computer power supply and an electric fuel pump, I have a mini fuel farm for my motos.
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