Not sure what happened yet just quit at 110kmph

[Big Red]

Ok Freaking thing did it again this time on the side of the highway at night. i will be taking apart the petcock to see if it is malfunctioning. but it was fine on the ride to my ball game. it was on the ride home after. it seems that it could be related to not warming up the engine before taking off. after the game i fired it up ran it for 30 secs with the choke on then hit the road and was on the highway in a block 5 min later i parked on the side of the road. same thing as last time just lost all get up. just gradually lost power. held the clutch in and stalled. let it out jump started for a bit then clutch again and it died. this time i did notice that there was no sign of fuel in the vacuum line from the petcock.

[Big Red]

I will be taking the petcock apart today to see if anything is wrong. I did pull the vacuum hose off the carbs and sucked on it and could see fuel flowing right away when it stalle out so it is/was getting fuel. but i notice the clear vacuum pipe from the carbs to the petcock is getting discoloured (clear to brown)

[mrbill5491]

My bike was doing something of the same, checked the petcock, it was fine. I finally discovered it was loosing vacuum. I checked the front carb boot, there was the problem. It was getting hard and had some cracks in it. When the rubber would warm up it would break the seal and loose the vacuum thus shutting down the petcock. New boots and clamps all the way around and problem fixed.

[Big Red]

so i took the fuel filter out of the equation and no issues since. so i will be putting a new one in when i get a chance.

[JTGS850GL]

No need for an inline filter. The petcock inlet in the tank has one. I hear of many issues related to incorrect inline filters and fuel starvation.

[Big Red]

just an update on this i removed the inline filter and installed a clear fuel line. no issues since. Keep It Simple Stupid....

[Maddevill]

If the problem returns have you checked that the tank vent is not blocked?

[81GS850]

I just wanted to add to this, had the same problem and it was resolved by taking the inline filter out.

[wymple]

If my 850 reads full on the center stand, it is, I believe, over full. It will get rid of the extra, blowing it out making little messes. I keep it reading full on both wheels sitting level and it uses no oil, nor makes any mess.

[81GS850]

Another update... It stopped running about 45mph... Didn't have any problems driving all day then on the ride home it cut out. I'm wondering if the petcock screen has a bunch of junk in it, or if one of the coils is cutting out.

[gustovh]

Take the gas cap apart and make sure it is venting properly as stated before.

V

[81GS850]

I've done that and it vents fine.