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bike has 85k on it, premium gas, just ran 1/2 can of SeaFoam through.
I've only owned for the last 1500 mi.

I'd wonder if this was really pinging or a tick, except stops as soon as I roll back throttle.
Ideas on what's causing this ? - seems to run fine otherwise.

Thanks
 

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If the "ping" is consistent with RPM, then you probably have a small exhaust leak where the header meets the head. Also, a Wing should not need premium gas. Waste of money in most cases.

John
 

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you should only run regular gas in a wing.....premium gas burns too hot for your engine and causes a ping
 

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Gotta Love - I'll get on those plugs as I have only "been thinking about" that, and get back to U.

Dadoo - I've read that on here, but playing it safe until get this figured out

& John - I've run it on plus too + sticker on frame under oil dipstick says 91 octane
 

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check this out for fuel ratings. There are two different ways to measure. The 91 you see is probably the equivalent of 87 pump octane.

taken from http://www.absolut eastronomy.com/topics/Octane_rating

The most common type of octane rating worldwide is the Research Octane Number (RON). RON is determined by running the fuel in a test engineEngine
An engine is a mechanical device that produces some form of output from a given input.An engine whose purpose is to produce kinetic energy output from a fuel is called a Wiktionary:prime mover; alternatively, a motor is a device which produces kinetic energy from a preprocessed "fuel" ....
with a variable compression ratioCompression ratio
The compression ratio of an internal-combustion engine or external combustion engine is a value that represents the ratio of the volume of its combustion chamber; from its largest capacity to its smallest capacity....
under controlled conditions, and comparing the results with those for mixtures of iso-octane and n-heptane.

There is another type of octane rating, called Motor Octane Number (MON) or the aviation lean octane rating, which is a better measure of how the fuel behaves when under load. MON testing uses a similar test engine to that used in RON testing, but with a preheated fuel mixture, a higher engine speed, and variable ignition timingIgnition system
An ignition system is a system for igniting a fuel-air mixture. It is best known in the field of internal combustion engines but also has other applications, e.g....
to further stress the fuel's knock resistance. Depending on the composition of the fuel, the MON of a modern gasoline will be about 8 to 10 points lower than the RON. Normally fuel specifications require both a minimum RON and a minimum MON.

In most countries (including all of EuropeEurope
Europe is, conventionally, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally divided from Asia to its east by the water divide of the Ural Mountains, the Ural , the Caspian Sea, and by the Caucasus Mountains to the southeast....
and AustraliaAustralia
Australia, officially the Commonwealth of Australia, is a country in the southern hemisphere comprising the Australia of the world's smallest continent, the major island of Tasmania, and numerous list of islands of Australia in the Indian Ocean and Pacific Oceans....
) the "headline" octane rating, shown on the pump, is the RON, but in the United StatesUnited States
The United States of America is a Federal government constitutional republic comprising U.S. state and a federal district. The country is situated mostly in central North America, where its Contiguous United States and Washington, D.C., the Capital districts and territories, lie between the Pacific Ocean and Atlantic Oceans, Borders of the U...
, CanadaCanada
Canada is a country occupying most of northern North America, extending from the Atlantic Ocean in the east to the Pacific Ocean in the west and northward into the Arctic Ocean....
and some other countries the headline number is the average of the RON and the MON, sometimes called the Anti-Knock Index (AKI), Road Octane Number (RdON), Pump Octane Number (PON), or (R+M)/2. Because of the 8 to 10 point difference noted above, the octane rating shown in the United States is 4 to 5 points lower than the same fuel elsewhere: 87 octane fuel, the "regular" gasoline in the USUnited States
The United States of America is a Federal government constitutional republic comprising U.S. state and a federal district. The country is situated mostly in central North America, where its Contiguous United States and Washington, D.C., the Capital districts and territories, lie between the Pacific Ocean and Atlantic Oceans, Borders of the U...
and CanadaCanada
Canada is a country occupying most of northern North America, extending from the Atlantic Ocean in the east to the Pacific Ocean in the west and northward into the Arctic Ocean....
, is 91–92 in Europe. However most European pumps deliver 95 (RON) as "unleaded", equivalent to 90–91 US (R+M)/2, and some even deliver 98 (RON), 100 (RON), or 102 (RON).
 

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John, I have to tell ya, I am scratching my head on the higher octane making your engine ping. That is backwards.



The octane rating of gasoline tells you how much the fuel can be compressed before it spontaneously ignites. When gas ignites by compression rather than because of the spark from the spark plug, it causes knocking in the engine. Knocking can damage an engine, so it is not something you want to have happening. Lower-octane gas (like "regular" 87-octane gasoline) can handle the least amount of compression before igniting.
 

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Are you confusing this with the harshness and vibration some 1200's suffer from below about 2800 revs when pulling quite hard?....steve
 

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if the pinging is happening when u are running along slowly and try to accelerate it is a normal situation caused by being in the wrong gear and the timing advance and motor vacuum vs load cause preignition,motor might be carboned up some too....try some seafoam....but every once in awhile run it like ya stole it,you'd be surprised how much better the bike will run after that
once had a portable generator that stopped running because the intake valve couldn't open because the carbon had built so bad on the piston

try dropping it down a gear or two and see what happens then,i think your problem will go away
 

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Hi Gronk,

Gl12s don't like to be lugged, and trying to accelerate below 3 grand is lugging that motor. If I remember correctly, the owner's manual calls for 86 octane fuel.

Now, the way I understand it, higher octane burns slower, so sometimes it does not burn completely. This can leave deposits on the valves. Those deposits can catch fire and damage a valve, or simply pre-ignite the fuel mixture and cause pinging.

This is just what I've read, mostly in M/C mags. Truly, I'm the farthest thing from an expert. But...my GL12 pings sometimes. Mostly with Chevron gas. Higher octane does not help. It's been doing it for well over 200k miles so, I don't think it's too serious. I just keep the rpms above 3k.
 

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Plugs were white to beyond white, gap is on, and I forgot to check #, but lets assume they are right (will go back to check).
ChasW - I'm saying that it ping even w premium, NOT because of.
SteveW - diffinite ping under light throttle

Just got back from about a 5-600 mi trip, but U know I do a lot of around town and not using the bottom 3K isn't too practical.

And YES, I'm going to put the other 1/2 of the SeaFoam through it, because what am I saving it for?
 

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gronk99 if the plugs are ok and you are sure of that then try some Seafoam if that does not work you need to start checking the coils to see if they are putting out enough spark. All this could also be as simple as changing your gas station. If you are getting junk for gas that will make your wing run like you describe. I had a similiar problem and changed to top tier gas and the bike ran 100% better and yes I use premium gas but to each his own. My bike just runs better on it. Each bike is different. Go figure.:?
 
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