KTM 990 gasoline problem

[Meersen]

This is a 2011 Dakar model--went for 30 mile ride today came home put in garage and smelled a little gas could not see any fuel any where. After about 30 minutes in house went back in garage and notice gasoline odor. Went to look at bike and heard a percolating noise. First I thought it was radiator but that looked ok. Then opened gas lid and gas looked like it was boiling which I knew it wasn't opened other tank same issue. This percolation lasted a good hour. When I first opened the thanks it felt like there was vacuum sound upon pulling lid. Bike starts ok and runs ok I'm not very mechanical and wondered if any other person has had this problem or have any ideas . Thanks in advance

[Katoom72]

Could be these maybe? http://www.ktm950.info/how/Orange%20...ance_tube.html

http://cpmodem.smugmug.com/gallery/2575878#109089728

http://www.ktm950.info/how/Orange%20...terectomy.html

[sonoran]

When you were riding it how high was the temp gauge?

[Meersen]

2 bars from the top

[Meersen]

Had bike at ktm dealer for 3 days and they said they did not see anything. Put it on computer and checked mapping also looked at heat shields and venting on gas claps.Picked it up rode it home freeway 30 miles at 70 to 75 then rode it in neighbor hood for 15 minutes at variable speed 20--35 mph stopped couple times under traffic light --fan came on and it showed 2 bars from the top on engine temp. Parked it in garage fuel was boiling like tea kettle and could feel some pressure when opening gas caps. Any more ideas from anyone thanks

[sonoran]

You might want to burp your cooling system. If there is air in it the bike will run hot and possibly boil the fuel... 2 bars from the top is unusual for the type of riding you are describing.

http://www.advrider.com/forums/showthread.php?t=598938

[Lycan1]

I have had fuel boil in my tanks in really hot weather, during slow riding. I have since used reflective heat sheilding on the inner sides of both tanks, as well as installing a second fan. The fuel absorbs a lot of engine heat considering it surounds the engine. The heat shielding really helps and can be found at hot rod shops, in rolls of self adheasive product.

[travelsomewhere]

Hey, a 990 friend of mine had this happen and he will know what it is, he is in china for work but i will shoot him a text and tell him to look into the forum. i thought he said something about the connection hose between the tanks having something to do with it. hang tight i will do my best.

[travelsomewhere]

I talked to my friend in that is in China and he said that his was a dirty fuel filter. may want to check that out

[offworlder]

Originally Posted by travelsomewhere

I talked to my friend in that is in China and he said that his was a dirty fuel filter. may want to check that out

Side note: according to KTM tech @ Adventure Rally, fuel filters should be replaced at most every 20K km.

[Meersen]

Thanks guys bike at shop now having fuel filter checked if ok will try heat shield and 2nd fan.

[Meersen]

Got bike back from dealer today they replaced fuel filter because the sock on it looked like it was filthy. Mechanic said it looked like it was 10 yrs old. Rode bike 35 miles on freeway then rode it slow --stop --and go and figure 8 slowly etc . It never over heated --fuel never boiled and bike rode very smoothly at all paces so it seems it solved my problem and it seems to be same as several other guys have experienced with new bikes. thanks for all the imput

[Deviant666]

Originally Posted by Meersen

Got bike back from dealer today they replaced fuel filter because the sock on it looked like it was filthy. Mechanic said it looked like it was 10 yrs old. Rode bike 35 miles on freeway then rode it slow --stop --and go and figure 8 slowly etc . It never over heated --fuel never boiled and bike rode very smoothly at all paces so it seems it solved my problem and it seems to be same as several other guys have experienced with new bikes. thanks for all the imput

A dirty fuel filter causes other issues like surging when the you're trying to rev higher...I've had about 4-5 filter changes due to the above mentioned symptom but never ever had my fuel boiling...I ride in very hot climates too...btw 2 bars from the top isn't a problem in slow traffic...last two temperature bars flashing THAT'S overheating anything less is just normal, especially so if your bike hasn't been broken-in yet (tighter metal to metal tolerances)...