08 TW runs fine and stalls at high speed
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  1. #1
    Junior Member buba1's Avatar
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    2008 TW with 3500 km on it, runs fine, ride at high speed 100 km/h. Pull clutch in, engine dies. Starts right up, runs fine, after a while happens again.

    Yes, lots of gas in the tank.

    -Never did a valve adjustment on it, but will do one soon

    -Never changed the spark plug

    It would be really bad to be stuck in the middle of nowhere.

    Any ideas, please?

    Thank you

  2. #2
    Banned qwerty's Avatar
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    Low fuel flow rate from partially blocked petcock, needle and seat, filter, or kinked hose. Stopped up vent.




  3. #3
    Junior Member buba1's Avatar
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    Low fuel flow rate from partially blocked petcock, needle and seat, filter, or kinked hose. Stopped up vent.



    To start with easy stuff:

    -filter? are you referring to the air filter? I washed that about two weeks ago.

    Is there a fuel filter on the TW?

    -petcock, how do I check /clean that? Do I have to empty the gas tank completely and how do I clean the petcock?

    -vent? that would be the tank vent? How do I clean that one?



    Sorry for too many questions.

    Thanks in advance.

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  5. #4
    Senior Member rm_hm's Avatar
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    Like Qwerty said



    If you take your oem gas cap off and hear a ppssst then vapor lock may be your culprit.



    There is a strainer in the fuel tank (may be clogged)







    Some grit may have got past this screen and clogged up the petcock valve or the carb In that case you will need to clean one of them out. http://tw200forum.co...-carb-cleaning/



    That's why many of us use a 90d inline filter to protect the carb. http://www.rendergre...Fuel_Filter.htm



  6. #5
    Banned qwerty's Avatar
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    There is a vent in the gas cap to allow air in as fuel is used.




  7. #6
    Senior Member secretStash's Avatar
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    it's not uncommon for that vet to get clogged with dried gas or debris. There is also a small filter on the needle valve.



    -sS

  8. #7
    Senior Member turborob's Avatar
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    My bike has started quitting at high speed; I'm thinking vapour lock. How do I check/clean my fuel/tank breather?



    Thanks in advance,



    Rob.



    PS, it isn't fun when it happens on busy roads at around 60mph.....

  9. #8
    Senior Member peruano's Avatar
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    Rob, The obvious way to check is to immediately loosen the fuel cap. If its vent is blocked and you have negative pressure in the tank, you should 1. hear the whoosh of air entering the tank, or 2. be able to immediately start the bike with not problems.

    On the other hand if you have some other fuel restriction (at top speed you may use fuel faster than it can run into the carb, it will be a bit harder to diagnose. I'd check all fuel filter and maybe even check to see if the flow from the petcock seems normal (i.e more than a drip). Thats my best guess for solutions or better symptoms for diagnosis.

    Tom
    Tom - TW200 2002, Kawasaki VN 500 2006

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  10. #9
    Banned qwerty's Avatar
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    A TW cannot vapor lock. Vapor lock is gasoline evaporating in the fuel lines due to excess heat, then the vapors reach the fuel pump and the pump won't pump. TWs can draw a vacuum with a stopped up fuel vent.




  11. #10
    Senior Member turborob's Avatar
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    Hmm, interesting.



    I might check the fuel tap filter.



    Bike would suddenly cut out - not even a pop. First, it happened at an indicated 100km/h on the highway. Slowed, but didn't quite stop. I decided to take it easier, and it again happened at 95km/h; this time it took longer to start. Then 90, and it took a long time to start.



    By then, I was almost home. Riding up to km/h the bike was then faultless.



    I'm thinking starvation - from where is the question.

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