Issue with 92 Yamaha TDM 850

Discussion in 'Land of the Rising Sun: ADV Bikes from Japan' started by alexk243, Jul 14, 2010.

  1. alexk243

    alexk243 Been here awhile

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    Ok, I have been having a heck of a time with my bike. Recently it left me stranded when it ran out of gas. I pulled to the side of the road after the engine died and filled it up with a spare tank, unfortunately the bike would not start even after I added the gas. I have since trailered it back home added more gas and it still will not start.

    Any Ideas?
    #1
  2. xtphreak

    xtphreak from B4 "adventure bikes"

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    vaccum fuel pump lost prime

    put a hose in the tank and seal opening with your hand
    blow to pressurize the tank

    also known as TDM blowjob
    #2
  3. djg

    djg Been here awhile

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    Add an electric fuel pump, a well known mod.
    #3
  4. xtphreak

    xtphreak from B4 "adventure bikes"

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    like one off early R6 :nod
    #4
  5. alexk243

    alexk243 Been here awhile

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    Wow, I used to have to do this with my jetskis to prime the diaphragm fuel pump on the carbs, but with those we were able to blow into the return line.

    Cant believe I didnt think about that with this bike. I guess I assumed gravity would do the job.
    #5
  6. omeoxlv

    omeoxlv Been here awhile

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    The other thing for ANY issue with your TDM is to join the
    http://www.carpe-tdm.net/ipb/

    Graeme
    #6
  7. alexk243

    alexk243 Been here awhile

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    Yea I am a member there too (same name on both I think) and I have been posting most of my issues there now.
    #7
  8. itsatdm

    itsatdm Long timer

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    I put 67,000 miles on one and only 2 problems. You have Id'd one of them. A early 90 r6 or r1 electric fuel pump for the carbed models will solve one.

    The other is when the gas mileage goes into the toilet. Replace the Emulsion tubes with a nickle plated one from Factory Pro. Forget their Jet kit. The skinny needles acts like a saw.
    #8
  9. alexk243

    alexk243 Been here awhile

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    What do those emulsion tubes from factory pro run? I may look into getting some this winter.

    My bike also has their weird issue of just not starting after it gets wet until I take it apart and clean out the carbs. they dont even seem dirty, but it wont start now so I have to tear it apart.
    #9
  10. Baron650

    Baron650 650x2

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    Thanks for the reminder..
    NOT missing dicking around with the carbs on the old TDM!
    :freaky
    #10
  11. itsatdm

    itsatdm Long timer

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    I sold my bike 4 years ago so not up to date. Just Google Factory Pro, his site is a rat maze. The owner told me the tubes are stock ones that have been nickel plated for hardness. At the time they were about $5 more than stock. Your carbs are 38mm Mikuni down drafts.

    The carbs got to be a PIA. On a run through Nevada and Utah, a side wind at a certain angle and velocity would turn the engine off like blowing out a candle. I got a lot of use of that rubber hose blow job.
    #11
  12. alexk243

    alexk243 Been here awhile

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    Old thread... I know, but just getting around to doing this work on it. Bought the R1 fuel pump, worth getting the emulsion tubes too or will the fuel pump be enough?
    #12
  13. itsatdm

    itsatdm Long timer

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    Get the emulsion tubes. They affect mileage. The most wear I ever got out them was 25,000 mile. Buy them here http://www.factorypro.com/products/Jets,%20Hitachi,%20buy.htm Stock dimensions but nickel coated.

    This bike will get 50 mpg unless the emulsion tubes are ovaled out. Vacuum vs electronic deals with starting up.
    #13
  14. alexk243

    alexk243 Been here awhile

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    The ones you sent me were for "750 and 1000 and 1100 XV Virago and maybe the 920" will that work for the TDM?
    #14
  15. itsatdm

    itsatdm Long timer

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    Do you mean me? If so the wrong guy. The Carbs are 38mm Mikuni, same as used on the old air cooled 900 Ducati's
    #15
  16. Butters

    Butters Kwyjibo

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    #16