1999 gas gas txt 270 starting problems

Discussion in 'Trials' started by MILLENNIUM FALCON, Jun 16, 2017.

  1. MILLENNIUM FALCON

    MILLENNIUM FALCON Been here awhile

    Joined:
    Dec 19, 2011
    Oddometer:
    341
    Location:
    Central Pa
    I recently picked up a txt270.... When the engine is warm it will easily start in about 1/2 kick. When its cold you can kick and kick and kick without even a pop. Then About 37 kick later it will burble a few times then light. I pulled the plug when I was having trouble starting it. The plug was very wet... I sprayed some carb cleaner on the plug let it dry and kicked the engine over a few times with the plug out.... then I let it sit about 1 hour. Put the plug back in... still nothing! Then after a million kicks it started and ran fine. Any ideas? My knee cant take it. :) Ambient temps are in the 80's here. Thanks!
    #1
  2. heffergm

    heffergm Long timer

    Joined:
    Sep 22, 2014
    Oddometer:
    1,116
    You're not trying to start it with the choke pulled are you? Mine really doesn't like the choke unless it's under 50.

    Before you try it next time, lay the bike over on its side until it starts spilling gas out of the overflow, then give it a try.
    #2
  3. lineaway

    lineaway Long timer

    Joined:
    Oct 1, 2011
    Oddometer:
    6,532
    Location:
    nm
    You need to clean the carb. The pilot jet is plugged up.
    #3
  4. Hoss Cartright

    Hoss Cartright Been here awhile

    Joined:
    Oct 23, 2016
    Oddometer:
    150
    correct plug is an NGK BPR5ES or BP5ES

    check connection of plug cap to coil wire and coil wire to coil

    premix at no less than 80:1, and best not to use cheap mini-mart gasoline. race gas is best but no less than name brand premium UL like BP or Shell 93 octane

    clean carburetor internals and check floats (weigh them on a very precise scale. 2.8gr. is the correct weight)
    #36 or #38 is the typical pilot jet, the number #115 area is good for the main jet at sea level or thereabouts. needle clip on second from the top slot. slide should be a #50 or maybe a #60.
    fuel screw on the side of the carburetor should be about 3.5 turns out
    make sure that the rubber sealing o-ring is inside the top carburetor cap (lid)

    loosen magneto cover to check to see if the magneto/stator is standing full of water

    clean air filter and use filter oil and do not over-oil it.
    #4
    jonnyc21 and Norman Foley like this.
  5. MILLENNIUM FALCON

    MILLENNIUM FALCON Been here awhile

    Joined:
    Dec 19, 2011
    Oddometer:
    341
    Location:
    Central Pa
    OK, I will check the carb and jets... I was not using the choke and throttle was completely close. The plug looked like it was megga flooded. I am running 80:1 bell ray sythetic lube the gas gas guy gave me..... I am running 93 pump gas from where I get gas for my other bikes, chainsaw, etc..... I will also look to see what plug is in it now. It starts beautifully when hot so hopefully I can get to the bottom of this. Thanks for the advice guys!
    #5