73’ Tiger 750 Starting Issue.

Discussion in 'Technical Help' started by Maxwell, Nov 11, 2019.

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  1. Maxwell

    Maxwell New Member

    Oct 28, 2019
    6
    3
    North Carolina
    Greetings!

    New to triumphs, I just picked up an old Tr7 that had been sitting for a while and am having a hard time getting it started ( again)

    What I’ve done so far:

    I just installed a brand new Amal 930 premier carburetor and some new plugs
    and after monkeying with the carb yesterday I brought her to life for the first time in years, got it idling pretty okay for a while and called it a day.

    The next day however, After trying to start it all day, I got it running for a few minutes until, I tried adjusting the pilot air screw and it killed on me. I haven’t been able to start It since.

    Here’s a video of it running yesterday:

    https://imgur.com/a/q3SdCBZ

    Anything sound weird? I’m totally lost.
     
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  2. Helmut Visor

    Helmut Visor Only dead fish go with the flow
    Subscriber

    Oct 3, 2018
    6,100
    800
    Three Counties
    Howdy Maxwell, and welcome in :cool::cool:
    Hang fast, someone with the knowledge will be along soon ;);)
     
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  3. joe mc donald

    Subscriber

    Dec 26, 2014
    13,919
    1,000
    slough / burnham
    Maxwell
    Welcome to the family. Yes you have a nice machine there. You really just got to check the tappets and make sure your new carb is jetted properly. What electric's are you running points or electronic. If points make sure they are adjusted and set properly and all the bits are sound. Really is trial and error there but you will get it I am sure. Also make sure your coils are in good order.
    Regards
    Joe.
     
  4. Adie P

    Adie P Crème de la Crème

    Jul 7, 2018
    3,627
    1,000
    MID DEVON
    Hi Maxwell and welcome on board!

    You don't mention in your description whether or not you cleaned out - and sealed - the fuel tank. If the bike has sat around for a long while it's quite possible that rust on the inside of the tank is flaking off and blocking the inlet, and possibly the jets and passages, in the carb.? As it's a new carb it should be fairly easy to clear with carb cleaner aerosol and a straw.

    If that's not the case, then you'll need to go back to basics - check for sparks, fuel and valve clearances then let us know what, if anything, you find.

    Good luck.
     
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  5. Rocker

    Rocker Elite Member

    May 1, 2016
    1,662
    800
    Suffolk
    A flat battery could be the cause if you have an electronic ignition fitted
     
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  6. feckless

    feckless Noble Member

    Apr 16, 2019
    1,026
    443
    Cumbria
    As it was running yesterday I would be looking at Fuel and sparks as my 1st port of call. as previously said before.
    I don't think the valve clearances would change that quickly to stop it running. but a loose tappet is a happy tappet on the old triumphs :):)
     
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  7. capt

    capt Elite Member

    May 8, 2016
    3,052
    750
    western Australia
    Points can come loose , close up and she stops running ? ?
     
    • Agree Agree x 2
  8. Maxwell

    Maxwell New Member

    Oct 28, 2019
    6
    3
    North Carolina
    Thank you all for the advice, I got her starting good now.

    Let it sit overnight and this morning I backed out the throttle adjuster on the carb and set the air screw to 1 1/2 turns and tuned it from there.
     
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  9. joe mc donald

    Subscriber

    Dec 26, 2014
    13,919
    1,000
    slough / burnham
    Maxwell
    Great news. Glad you are sorted. Poor old girl maybe just wanted a rest.
    Ride Safe & Enjoy
    Joe.
     
  10. Vulpes

    Vulpes Confused Member

    Mar 14, 2018
    16,893
    1,000
    Netherlands
    Good you got it sorted mate. And welcome in.
     
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