Help! Bike dies while riding - Ex-500.com - The home of the Kawasaki EX500 / Ninja 500R
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post #1 of 29 (permalink) Old 6-11-2008, 10:29 PM Thread Starter
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Help! Bike dies while riding

Today was the second time this happened to me, the first was on the freeway at rush hour going 80. It pretty much feels like I'm running out of gas, first just really bad throttle response and then the bike just quits. If I start it back up and try to keep it running for a few minutes it runs perfectly fine after that, but it's dangerous that it just dies like this. Has anyone else had this happen to them before? The bike has a Muzzy exhaust, Dynojet jets and a K&N air filter all from the previous owner.
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post #2 of 29 (permalink) Old 6-11-2008, 11:31 PM
 
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Re: Help! Bike dies while riding

I had a similar problem.. It would die out then crank back.. but it would run like crap. Spitting and sputtering.. it was caused from a coil pack connection on mine. hope this helps!
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post #3 of 29 (permalink) Old 6-12-2008, 9:29 AM Thread Starter
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Re: Help! Bike dies while riding

Mods are in the first post.
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post #4 of 29 (permalink) Old 6-12-2008, 11:29 AM
 
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Re: Help! Bike dies while riding

I had this happen once on a ninja 250, it was a pinched fuel vent hose. Also, if you don't have an inline fuel filter, you could have got some crap or water in your gas. So a cheap diagnostic check is to remove your gas tank and dump all the old gas (environmentally, of course) then fill it with fresh stuff and see if the problem continues. Has your bike been sitting for a while? These carbs are very tempermental to sitting and to bad gasoline.
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post #5 of 29 (permalink) Old 6-12-2008, 11:59 AM
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Re: Help! Bike dies while riding

Another thought, check your fuel tank vent and see if its clogged or not functioning for some reason.



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post #6 of 29 (permalink) Old 6-12-2008, 8:54 PM
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Re: Help! Bike dies while riding

mine is doing this exact same thing. takes about 45min of riding for it to rear its ugly head. im pretty sure it fuel related. sometimes mine will completely die and cant start for a few minutes. other times i can ride it out. playing with the fuel selector seems to have a helping effect but ive taken it out and rebuilt and even switched out another one and it still happens. its gone from a mild annoyance to out right dangerous if im on the highway. ive pulled and cleaned the carbs twice and installed another fuel filter. gas was drained refilled and the same happens. im gonna play with it more this weekend. i dont think its a bad electrical part since i can get it going again or just ride it out. definately feels like it outta gas.
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post #7 of 29 (permalink) Old 6-13-2008, 9:50 AM Thread Starter
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Re: Help! Bike dies while riding

Great Im not alone... same thing exactly after like 30-45 minutes. Ill check the fuel vent this weekend i guess...
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post #8 of 29 (permalink) Old 6-13-2008, 3:46 PM
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Re: Help! Bike dies while riding

Sign me up for that same problem.
+1/2 tank of gas but feels like it's running out - surging when the gas finally flows proper.
Mine happens within 5 minutes.
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post #9 of 29 (permalink) Old 6-13-2008, 4:14 PM
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Re: Help! Bike dies while riding

I had this problem when i first got the bike....it's a 89 with 16,000 miles. to me it seemed to be running rich when i held a steady 5-6000rpms and was fouling the plugs, anything under 5000rpms the bike ran well but the idle was really low around 800rpms or so.

So i took the carbs off and completly cleaned the carbs, the floats were not stuck but the jets were clogged and the mixture screws were about 3 turns out. i put the mixture screws at 3.5 turns out and put the bike back together. while tuning the carbs i noticed that my fuel line was pinching off the gas flow....replaced it with a thicker fuel line i got from autozone...also if your running rich, check your oil and smell it for gas...fog has mentioned in other threads that if the bike is running rich when it sits it can let gas leak past the rings and get into your oil....not good....i checked my oil and guess what, i had gas in there.

so i cleaned the carbs, replaced fuel line, replaced fuel line filiter, pulled and cleaned the plugs, changed oil and oil filter. so far i have about 130 miles on the bike after doing the work...mostly highway riding. the only thing i need to do is lean the bike a little more..maybe .5 of a turn...i think my bike is still running a little rich...but other than that so far so good....it has not died or suttered on me since then.
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post #10 of 29 (permalink) Old 6-13-2008, 4:45 PM
 
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Re: Help! Bike dies while riding

i've got the same problem. its done it 3 times tome and each time i clean the carbs theres dirt in the bowls. is there some thing i can put in the tank to clean it? thanks
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post #11 of 29 (permalink) Old 6-13-2008, 4:55 PM
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Re: Help! Bike dies while riding

are you sure it's dirt and not rust....ive heard of people using seafoam but i think thats for the carbs and not the tank. next time you tank is empty take a flashlight and shine it down there and check for rust spots. if you have rust then you need to line the tank wit ha coating. now you can use what people call kreeme but i don't recommend it since it can flake with time and i honestly havent had great results with it. i recommend you use this to line the tank...i've used it once and have had great results...very easy to use and cheap... http://www.kbs-coatings.com/Tank-Sealers_c_7-1-0.html
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post #12 of 29 (permalink) Old 6-13-2008, 5:01 PM
 
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Re: Help! Bike dies while riding

Has anyone completely figured this out yet? I just had this happen today on the way home. Doing 60 on a 3 lane arterial (no shoulders), RPMs in the range of 5k. Got to a slight grade and it dogged, I gave it throttle, it dogged more, went to downshit, done. Coasted to a nearby parking lot. Had gas, tried reserve anyway, nothing. Flipped back to main supply, started up instantly and run just fine the rest of the way home. I'm worried about driving it now.

Thinking I should start with the fuel filter. Bike has around 13,500 on it and who knows when it was changed last. I had the float replaced last year and stored it properly over the winter so I'm sure the carb isn't the problem. You'll have to excuse the ignorance, but can someone give me some general direction to where the fuel filter is? Will I need to remove the tank?
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post #13 of 29 (permalink) Old 6-13-2008, 5:13 PM
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Re: Help! Bike dies while riding

if you have a inline fuel fiter it will connecter to the line that goes to the carb and tank....and yes you will have to remove the tank to replace it.....

another thing that i noticed is to check and make sure the rubber boots that come from the airbox and connect to your carb are connected properly. if not your pulling in more air and i can make the bike run dodgey also.
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post #14 of 29 (permalink) Old 6-13-2008, 5:35 PM
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Re: Help! Bike dies while riding

im still working on it. today ive replaced the entire fuel line, new filter, cleaned carbs, adjusted pilots, and sync them. bike runs beautifully but i havent ridden it long enough to find out if its fixed. im guessing not since everything looked ok parts wise but the sync was a bit out.
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post #15 of 29 (permalink) Old 6-13-2008, 6:18 PM
 
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Re: Help! Bike dies while riding

Happened to me yesterday. Bogged down like I was running out of gas and then died when I pulled over. Turns out to be a huge air bubble in the fuel line (god bless clear plastic lines). Had to suck on the vacuum hose to get it flowing again. Sucked having to pull the gas tank on the side of the highway to check the fuel filter though.. I may have to strategically relocate it to somewhere more visible.
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post #16 of 29 (permalink) Old 6-13-2008, 6:32 PM
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Re: Help! Bike dies while riding

Quote:
Originally Posted by White Trash
Has anyone completely figured this out yet?
Yes. Take the gas cap apart, clean the vent. You are running out of gas, the vent clogs and creates a vaccum in the tank, that stops the flow of fuel to the carb.

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post #17 of 29 (permalink) Old 6-13-2008, 6:42 PM
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Re: Help! Bike dies while riding

Could a tankbag be the "clog" by covering the cap?
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post #18 of 29 (permalink) Old 6-13-2008, 9:12 PM
 
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Re: Help! Bike dies while riding

Quote:
Originally Posted by Porkchop
Could a tankbag be the "clog" by covering the cap?
no
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post #19 of 29 (permalink) Old 6-13-2008, 9:12 PM
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Re: Help! Bike dies while riding

Maybe I missed it but the quick check for a blocked vent is to open the fuel cap. Listen for the "whoosh" of air or that the bike will start right away.


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post #20 of 29 (permalink) Old 6-13-2008, 9:31 PM
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Re: Help! Bike dies while riding

porkchop,

the tankbag doesn't clog the gas cap because the tank vents under the seat.
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post #21 of 29 (permalink) Old 6-13-2008, 9:38 PM
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Re: Help! Bike dies while riding

Quote:
Originally Posted by ENGR
porkchop,

the tankbag doesn't clog the gas cap because the tank vents under the seat.
Noooo, The tank vents through the keyhole in the cap. But the tanks bag won't block it either.

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post #22 of 29 (permalink) Old 6-13-2008, 10:02 PM
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Re: Help! Bike dies while riding

took bike for a longer ride. died twice about 30 miles from home. starts up again in a few minutes. seems to be getting worse though. maybe it is electrical. guy behind me said my lights went out before i coasted down. i guess a loose wire could cause it but i would think it wouldnt get better if you keep riding it. ill have to look at it again tomorrow. i dont think theirs much more for me to do to the fuel system. tank vents fine, no kinked lines, all fluids flow well. gonna have to look else were. hard though since it acts up so far away from home.
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post #23 of 29 (permalink) Old 6-13-2008, 10:28 PM
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Re: Help! Bike dies while riding

check your carb vent hose....and remove. thats the brownish-clear plastic tubing on one of the carb fuel rails (between carbs) sorry, i can't remember whether top or bottom rail. if it gets burnt on exhaust, , kinked or clogged it will create vent lock with resultant lack of fuel delivery.its worth checking AND discarding.

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post #24 of 29 (permalink) Old 6-14-2008, 8:06 AM
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Re: Help! Bike dies while riding

that line has been gone for a long time. i was thinking a carb vacuum issue but all seems fine. it was riding fine then one day it just started. i didnt touch a thing prior to it but i sure am now. it really does feel like a running out of gas issue. cant seem to get it to do it unless im really far from home. im gonna bring more tools with me so i can check on the side of the road next time.
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post #25 of 29 (permalink) Old 6-14-2008, 12:28 PM
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Re: Help! Bike dies while riding

well if your taking tools with you take and do some road side maintance, i sugest you pull the plugs to see if your fouling the plugs. thats what my bike was doing, it would run fine for about 20 min but after that it would die. i plulled the plugs right after i died and noticed they we with gas. also one guy mentioned that he had the same problem but the problem was his firing coil. it could be getting loose or not firing properly once the bike warms up.
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