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Tugger023

Rookie Author
Philadelphia

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Message Posted: Dec 29, 2013 1:28:43 PM

Anyone had problems or issues with using 10% ethanol gas in your Harley?
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TomB2
Champion Author St. Louis

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Message Posted: Mar 26, 2014 3:43:08 PM

I wouldn't chance the E-10 in a Harley unless you have no other choice. It'll probably be Ok as long as you don't try to store it with the ethanol mixed fuel in the carburetor, why risk it if real gas is available.
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borsht
Champion Author Oakland

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Message Posted: Mar 25, 2014 1:14:37 PM

Hello Cactusbob.
I'll go with your experience over grumpy cats word smithing semantics.
"backfire" is when any combustion takes place outside the combustion chamber.
Wikipedia says:
A back-fire or backfire is an explosion produced either by a running internal combustion engine that occurs in the air intake or exhaust system rather than inside the combustion chamber or unburned fuel or hydrocarbons ignited somewhere in the exhaust system. A visible flame may momentarily shoot out of the exhaust pipe. Either condition causes an objectionable popping noise, together with possible loss of power and forward motion. A back-fire is a separate phenomenon from the fire produced by Top Fuel dragsters.

Also, an explosion in the inlet manifold, carburetor/throttle body, or air cleaner of an internal combustion engine can occur when the intake valves are not shut prior to fuel combustion.[1]

The term derives from parallel experiences with early unreliable firearms or ammunition, in which the explosive force was directed out at the breech instead of the muzzle.[citation needed] From this came the use of the word "backfire" as a verb to indicate something that produces an unintended, unexpected, and undesired result.

Merriam -Webster dictionary states:
"
a loud noise caused by the improperly timed explosion of fuel mixture in the cylinder of an internal combustion engine.

I've been riding motorcycles for over 60 years. Have had both types of "backfires" .
I've even had my eyebrows singed when looking in an uncovered carburetor on a car that was too lean.
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WEPSMAN
Champion Author South Dakota

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Message Posted: Mar 24, 2014 10:58:57 AM

I try to run fuel without ethanol in my Harley. My owners manual says that it is OK to run 10% ethanol. I will run it if I have to, but prefer not to.
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GrumpyCat
Champion Author Alabama

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Message Posted: Jan 21, 2014 11:23:49 AM

"GrumpyCat . how can i say this nice .......well i cant say it nice

so i will not say it at all

just so you know

in 78 i finished 2 years training ocean county vo tec school for auto mecs
in 79 i finished 1 years lincoln tec for Motor Sports service

75 to 84 i worked for a power boat repair service .
84 to 98 i worked for an Amoco service station that did full repair service.
98 to present i work for a buy here pay here dealership , that is also open to public repairs and also work part time repairing motorcycles at my home

there are few people my age that have worked on more things with wheels than i have"

And with all that education and training you STILL DON'T KNOW WHAT A BACKFIRE IS? And don't know the fundamentals of mixture? Everyone knows ethanol leans the mixture. Everyone knows a lean mixture will pop in the exhaust headers during deceleration. But with all your education and training you don't know these things?

A backfire FIRES BACKWARDS. When the intake valve is open. Flames come out the intake. Things get destroyed.

Late combustion in the exhaust is nothing like a backfire.

Then again this is the ethanol forum...
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CactusBobs
Champion Author Arizona

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Message Posted: Jan 20, 2014 4:09:26 PM

GrumpyCat . how can i say this nice .......well i cant say it nice

so i will not say it at all

just so you know

in 78 i finished 2 years training ocean county vo tec school for auto mecs
in 79 i finished 1 years lincoln tec for Motor Sports service

75 to 84 i worked for a power boat repair service .
84 to 98 i worked for an Amoco service station that did full repair service.
98 to present i work for a buy here pay here dealership , that is also open to public repairs and also work part time repairing motorcycles at my home

there are few people my age that have worked on more things with wheels than i have
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GrumpyCat
Champion Author Alabama

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Message Posted: Jan 20, 2014 1:56:29 PM

"I have two bikes a 78 XLCH and a 93 Softail
when E10 started here , both bikes started back firing when cold "

Trust me, neither bike HAS EVER BACKFIRED. Had either backfired the air filter would have been blown off the bike.

E10 runs leaner than E0. Your carburetors need to be rejetted for E10. You are experiencing a late ignition popping in the exhaust. Mixture is not fully burning, or burning at all, in the combustion chamber during deceleration. It hits the hot exhaust pipe and finally burns producing the popping.

Drill out the brass cover over the pilot fuel screw (search online) and back the screw out 1/2 turn. You'll like it better on both E10 and E0 this way. This alone may not be enough to completely eliminate the popping. Bump the pilot fuel jet up one step and start the fuel screw at 1 turn out from very lightly seated. A thin washer raising your throttle needle will also help.
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t75143
Champion Author Texas

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Message Posted: Jan 20, 2014 12:48:32 PM

I have a Sporty and a Road King Police. I actually make my own 'ethanol free' (or pretty darn close) gas. The Sporty takes a half hour before it runs right using E10 and the RKP won't drink it...
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namzza6310
All-Star Author Milwaukee

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Message Posted: Jan 2, 2014 8:46:21 AM

Wish I owned a Harley
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CactusBobs
Champion Author Arizona

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Message Posted: Dec 31, 2013 8:53:06 PM

I have two bikes a 78 XLCH and a 93 Softail
when E10 started here , both bikes started back firing when cold

with E0 i used to start the bikes and right away i would push in the choke and go , RPM was always low until engines where warmed up but no back firing ever

today with E10 if you push the choke in right away the engines will "puff" a backfire through the air cleaner (lean mixture) when accelerating
so now i need to keep the choke on a little for a few miles and then the problem goes away

it's something i live with but i don't like it .

[Edited by: CactusBobs at 12/31/2013 8:53:59 PM EST]
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GrumpyCat
Champion Author Alabama

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Message Posted: Dec 30, 2013 10:10:50 AM

E10 is manageable.

Presumably you do not ride every day in Philadelphia so its best to park in a temperature regulated garage with a full tank of fuel.

When temperatures cycle your tank breathes fresh air containing moisture. This moisture condenses in the air space and drips into the fuel. Ethanol carries this water in suspension while it would sink to the bottom of the tank if pure gasoline and could be easily removed. Ethanol + gasoline + water doesn't run very well and once enough water is present it starts pulling the ethanol out of the water. This is called separation and the ethanol + water doesn't run at all.

Additives which are said to "cure" the ethanol problem only postpone the separation state.

So the best thing to do when storing your bike is to keep the tank full to minimize the air pocket which minimizes moisture condensation.
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rumbleseat
Champion Author Winnipeg

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Message Posted: Dec 30, 2013 4:41:20 AM

Lots of Harleys in Manitoba, unless they are all burning premium they are burning ethanol.
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