Question about 2005 BMW R 1150 RS

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Ethanol gas Will my bmw be affected by this ethanol gas? I hear that some people are having problems with this. What bikes are affected and which aren't?

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I don't think there's an exhaustive list on this. My bike had troubles until I replaced the fuel lines (hoping that solved it), but my 82 Vision has had no problems.

Posted on Nov 20, 2008

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BMW Motorcycles


Usually, a rapid or immediate loss of power is indicative of a major component failure on an engine...and its something you should consider. Some tell tale signs, smoke out of the exhaust (note the color); or severe noises like loud banging and knocking- time for a major engine repair / over-haul.

On the other hand, perhaps what is happening is just coincidental to some other problem that was already in the making and was exacerbated when you snapped open the throttle.

Check the gas flow from the tank through the delivery system and filter- check the fuel shut-off valve, make sure it's fully open and that it is free of any clogs which would prevent the full flow of gas to the carburetor. Check the carburetor, see if the float bowl is full of gas; if necessary, check for a faulty fuel pump.

Another remote possibility is stale gas- was the bike sitting in storage for a while or did you use gas from a can that was lying around in storage...especially if it is of an ethanol blend that absorbs moisture.

Check the electrical system for ground shorts, spark plug cables for any deterioration and intermittent spark, check the CDI for either a weak, no-spark or verify a strong spark; and so-forth.

If everything is so far okay, inspect the engine oil; it should look smooth, glossy, and somewhat transparent. and run some compression tests.

Best regards.

Mar 11, 2014 | BMW Motorcycles

1 Answer

Engine noise piston


i would try a lower octane first . and if possible try to get marine fuel. with no ethanol in it .its just normal gas like we use to have before .Anyway that bike was not meant for the fuel of today. this is a common problem with older bikes and smaller engines . see if the sound goes away after that . if not you may have a serious problem .

Nov 05, 2013 | 2000 Yamaha V Star 1100 Custom

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When I try to start I get fire in carburetor but wont run seems like it wants to start but wont last owner left out in rain dumped old gas put new cleaned carb bowl still does same thing


I think your timing needs to be adjusted. The bike seems to be firing early. Since the bike sat out, the timing belt may have gotten stiff with age, wearing the belt's tooth ridges, even knocking one off. Another problem you probably have is varnish in the fuel jet orifices, or in the float chamber, where the varnish can gunk up the float's spindle, the little rod the float pivots on, and the float may be stuck, delivering too much fuel to the carburetor. Try some sort of solvent made for the job of cleaning out the varnish, such as Chemtool 16 or Sea Foam or similar. Put a couple of ounces in the gas, and spray or brush some into the carburetor, let it work for a few hours, then turn the engine. It will run rough at first but should smooth out. If it doesn't then repeat the cleaning process. If that doesn't work, you may have a problem with deteriorating rubber O-rings and other rubber parts due to the effect of ethanol. That means taking the fuel system apart and overhauling it. Check out puregas.com for stations that sell non-ethanol gas. The ethanol problem is for older bikes especially.
Good luck

Sep 17, 2013 | Motorcycles

1 Answer

What kind of gas should I use in my 1981 yamaha 400 special?


You should be able to use unleaded but do not use ethanol treated gas. If you are unable to get ethanol free gas, then look at getting an ethanol treatment for your bike. Ethanol will play havoc with your entire fuel system gaskets and rubber hoses.

Jul 24, 2013 | Motorcycles

1 Answer

1995 yzf 600 , fuel issue, spits gas out carb1-2, and over fills with gas in carbs, is the yzf pumped or gravity filled with gas?


Carb. engines on bikes are usually gravity fed. Just follow the fuel line from the tank to see where it ids distributed to your carbs.
Sticky float valves and bad diaphragms will cause the carb to flood out. Ethanol gas could be the problem where it's eating away at the rubber parts. I suggest if you're not a bike mechanic, then get it to the shop where your carbs can be rebuilt using ethanol safe components and have them synchronized. Your bike will run better than it ever has.

Nov 14, 2012 | Motorcycles

2 Answers

What octain fuel should I be burning in a Suziki 800 Valusia


Most small engines, bikes and boats, recommend high test, just a little insurance against bad gas, now days you can find gas without ethanol, it might be 20 or 30 cents more, sometimes more, but it is worth it. The ethanol eats rubber like crazy, all your new flex fuel cars have fancy rubber in them, (the only difference), they say that if they sold e85 in your town you would buy, I believe it. I run high test in my bike all the time, and just lately been using ethanol free marine fuel. I haven't noticed any difference in performance. Hope this helps.

Jul 29, 2011 | 2003 Suzuki VS 800 Intruder

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2001 honda shadow what kind if fuel should i use


Regular unleaded should work well in your motorcycle; it may actually start and run better with regular than with premium gasoline.

The big wild card, however, is the amount of ethanol in the gas you are buying. Your bike would definitely run best on "pure" gasoline that contains little or no ethanol, but that's getting harder and harder to find. Personally, I have noticed that my bikes have started harder and run worse as the ethanol content in gasoline has increased. That's one reason I actually recommend staying away from premium, which sometimes has more ethanol in it than regular (it raises octane). I prefer to keep my bikes stock, rather than messing with the carb jets to compensate for the different performance curve of ethanol-blend gas.

If it's available in your area, you might try running your bike with some Cam2 racing gasoline to see if that makes a difference. You don't need the extra octane in that fuel, and some varieties of that fuel may still contain lead (a no-no for your engine), but it doesn't contain ethanol, as far as I know. Double-check with whoever is selling this fuel in your area to make sure you're getting the unleaded stuff. If you find that your bike runs well with this fuel, you might consider blending a bit of it with pump gas on going-forward basis.

May 31, 2011 | Honda RC 51 Motorcycles

1 Answer

I have a 1993 XR 600. I was recently riding and I noticed the bike started stalling. It wouldn't idle and then started noticing that it started leaking gas out of a little rubber black hose. Then the bike...


Yes, your carburetor needs to come off and be disassembled and put into a carburetor solution and soak for at least 2 - 24 hours depending on how bacd it looks when you take it apart.
Then rinsed with water and then blown out with compressed air, in every orfice in the carb body and jets

Reassemble and she'll puurr like a kitten again and have great response, run like new.
Ever since they have been putting ethanol in the gasoline, i've been doing a lot of carb cleanings.

Your gas tank will get a build up of ethanol residue that turns thick, it eventually clogs up petcocks and fuel filters and the little holes in the sides of the carb jets.
Soaking them brings them back to life without scratching, soak everything taken out of the carb except o-rings, gaskets,and float. Then soak the whole carb body and all the jets.

So i would suggest that when you do the carb clean, you drain the old gas out of the gas tank, and start off with a fresh tank of gas, and a new fuel filter.
You can also add seafoam to your fuel and this seems to help prevent corrosion of the ethanol.

Nov 30, 2010 | 1993 Honda XR 600 R

1 Answer

On start up when moving on first gear it starts to like shake just like if you did not give it enough gas


In an auto mobile the shake when you start rolling can be associated with a bad universal joint in the drive line. You could center stand the bike and spin the rear wheel by hand to see if this is the issue . You would probably have to buy a shaft assembly to fix that type of problem. I think you may be dealing with fuel issue probably related to two different things. Early GL1000's need to have the carb tops removed and cleaned at least once a year so the pistons do not stick. This will stop erratic behavior of the bike especially during take off . The other issue that can cause poor take off is ethanol fuel. Early wings prefer no ethanol fuel . The shake or noise is often pre-ignition/knocking/pinging/shaking caused by the fuel burning to soon and too lean. It can also cause you to turn up the idle so it does not stall when at a stop light. No ethanol fuel will cause you to have to turn down the idle or it will be idling too fast to shift in first gear. Again this is more common with the GL1000 but may also affect the GL1100.Remember the bikes were designed to run on 96 octane of real gas. Fortunately the GL1000 will run on 91 octane no ethanol. Hope this helps.

Jul 09, 2010 | 1983 Honda GL 1100 Innerstate Gold Wing

2 Answers

Will not idle


Your carbs are dirty and need to be cleaned. A tank of bad gas or old gas can gel up the jets. You buy gas, drive home, and when you get there the bike stops idling. Light gelling can be fixed by draining the carbs (screw on bottom of bowl), pulling the fuel line off the tank, and squirting some motorcycle carburetor cleaner down the fuel line. Plug the fuel line back in turn on the gas and start up the bike. If that doesn't work, using the same procedure buy some Chevron Techron fuels system cleaner, pour directly into the carbs and let sit over night (also drain tank and heavily treat one gallon of gas and put in tank) Fire up bike and let run ,idle, slow drive for 5 to ten minutes. This will usually get cycle idling without disassembling carbs. If it still wont idle you will have to take off the carbs, disassemble and clean blowing through the jets and jet passageways.

May 08, 2010 | 2005 Honda VT 600 C Shadow

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