Trident 750 Warning Light?

Discussion in 'Technical Help' started by Richard Cashmore, Jul 28, 2018.

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  1. Richard Cashmore

    Richard Cashmore New Member

    Apr 18, 2018
    1
    3
    Welshpool
    [​IMG][​IMG][​IMG]

    Hope the photo's come out this time - or I might need to start another thread lol.

    trumpet2.jpg

    trumpet3.jpg
     
  2. Oldyam

    Oldyam Grumpy Old Git

    May 14, 2017
    613
    500
    ireland
    Ok what's the zero like ?

    Is it 0.0 with the probes touched together ?

    If so that's out of range and needs replacing
     
  3. Richard Cashmore

    Richard Cashmore New Member

    Apr 18, 2018
    1
    3
    Welshpool

    I'll go check the zero.
    Many thanks again
     
  4. Richard Cashmore

    Richard Cashmore New Member

    Apr 18, 2018
    1
    3
    Welshpool
    With the probes touched together the reading is .001 so guess it's new crank sensor time?
     
  5. Oldyam

    Oldyam Grumpy Old Git

    May 14, 2017
    613
    500
    ireland
    Yes I would say so as 0.001on the 2k scale is a 1 ohm reading with the probes connected and does not substantially affect the readings taken
     
    • Like Like x 1
  6. Richard Cashmore

    Richard Cashmore New Member

    Apr 18, 2018
    1
    3
    Welshpool
    trumpet4.jpg


    New sensor should arrive today from Sprint (very good service) - do you measure the clearance from any particular point?

    Then it's finger's crossed...
     
  7. Oldyam

    Oldyam Grumpy Old Git

    May 14, 2017
    613
    500
    ireland
    You should be able to use any one of the high points on the rotor to set the gap, but its a good idea to quickly check them all.

    Make sure you get the fixing bolts tight as it makes a mess if the sensor moves when its running.
     
    • Like Like x 1
  8. Richard Cashmore

    Richard Cashmore New Member

    Apr 18, 2018
    1
    3
    Welshpool
    Thanks again - fingers crossed I'll be posting positive results tomorrow...
     
    • Like Like x 1
  9. Richard Cashmore

    Richard Cashmore New Member

    Apr 18, 2018
    1
    3
    Welshpool
    Well - new crank sensor fitted, and bike is exactly the same :(
    Runs for 30 mins then dies like she's run out of fuel.

    Funny thing is - won't start again, but will fire a bit if given the choke?

    I'm lost :(
     
  10. capt

    capt Elite Member

    May 8, 2016
    3,052
    750
    western Australia
    This bike is carburettor model, I'd check for blockage in fuel cap and fuel lines ! As bike will run whilst the float bowls have enough fuel , but once levels drop enough the fuel won't be picked up through the Jets and of course the motor will stop.
    It will only restart once enough fuel has bled down into float bowls, fuel cap vent is good place to start, then ImI afraid it's tank of and check all fuel lines and internal fuel filter on the fuel tap ! Also check Vacuum lines to fuel tap !!
     
  11. Richard Cashmore

    Richard Cashmore New Member

    Apr 18, 2018
    1
    3
    Welshpool
    I've had the fuel tap out and checked the filter etc.

    Runs for half an hour - until it gets properly hot. You can leave it half an hour and still won't run again, until it's right back to cold, then cycle starts again.
     
  12. Richard Cashmore

    Richard Cashmore New Member

    Apr 18, 2018
    1
    3
    Welshpool
    I've had the fuel tap out and checked the filter etc.

    Runs for half an hour - until it gets properly hot. You can leave it half an hour and still won't run again, until it's right back to cold, then cycle starts again.
     
  13. capt

    capt Elite Member

    May 8, 2016
    3,052
    750
    western Australia
    Sounds like might be coils
    Sounds like coils maybe ? My bike had one coil breakdown after I did engine up, put big bore kit with higher compression pistons in, coil's didn't produce a strong enough spark to make the fuel burn and so one coil died and the other struggled along, a 270° twin sounds strange on one cylinder ¥¢€ I can tell you !! The coil would come good once it was fully cooled down then when it got hot in 10 or 15 minutes of riding it would "die" until stopped for an hour and round it goes again { }
     
  14. Oldyam

    Oldyam Grumpy Old Git

    May 14, 2017
    613
    500
    ireland
    When running the bike now and it stops at 30 mins, you say that putting on the choke will make it fire ?

    Have you tried :-

    Opening the fuel cap ?

    Putting the fuel tap onto prime ( maybe pushing inwards on the tap too ) ?

    Have you checked the fuel filters in the "T" pieces between the carbs ?

    Whilst the carbs are out, clean out all the jets and check the idle screws, about 2 turns out is a good starting point, and modding the airbox is a good idea too, as below

    22780514_1761925917434980_6270045923387701969_n.jpg

    22780579_1761927187434853_7255386756993120568_n.jpg
     
  15. Richard Cashmore

    Richard Cashmore New Member

    Apr 18, 2018
    1
    3
    Welshpool
    It definitely seems electrical so coils might be the culprit.
    Can they be tested with a multi meter?
     
  16. Tricky-Dicky

    Tricky-Dicky Crème de la Crème

    Dec 12, 2016
    2,444
    1,000
    Norfolk UK
    The fact that it will run for thirty mins until hot kind of precludes any carb problems, it could possible be fuel supply like a pipe that gradually collapsing with vacuum, but i would also expect the engine to respond to this by getting a bit faster any time its on idle due to weakness of the mixture related, to me i would be looking at the coils or the electronic ignition amplifier as it seems so heat related.
     
  17. Oldyam

    Oldyam Grumpy Old Git

    May 14, 2017
    613
    500
    ireland
    Primary side of coils 0.63 ohms +/- 10%
    Secondary side of coils 10.5 k ohms +/- 10%

    Check both readings when hot & cold, and secondary is tested to one of the primary tappings
     
  18. Richard Cashmore

    Richard Cashmore New Member

    Apr 18, 2018
    1
    3
    Welshpool
     
  19. Oldyam

    Oldyam Grumpy Old Git

    May 14, 2017
    613
    500
    ireland
    When you say it stops after 30 mins running, how does it stop ?

    does it stop dead ?

    Does it die out like fuel starvation ?

    or does it sound like its running on two cylinders ?

    When you say it tries to start if you put the choke on, does it try on all 3 cylinders ?
     
  20. Richard Cashmore

    Richard Cashmore New Member

    Apr 18, 2018
    1
    3
    Welshpool
    After half an hour, bike sounds like it's running out of fuel for around five seconds, then dies.
    If you try to restart doesn't try to fire, but tries to start off choke - will run on two (just about..) but dies if you take it off choke.

    I'm confused lol
     
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