RPM idling problem

Discussion in 'Technical Help' started by Michal Augustyniak, Mar 26, 2016.

  1. Michal Augustyniak

    Michal Augustyniak New Member

    Mar 13, 2016
    3
    3
    UK
    #1 Michal Augustyniak, Mar 26, 2016
    Last edited: Jun 7, 2016
    Hi

    When idling rpm is unstable sometimes high some times way to low. During ride between gear switching, rpm never goes down or gotta wait long in order to. When stop on red light usually engine turns off due low rpm.

    Is it general problem of air leakage ?, I noticed the rubbers between carbs and a head is pretty bad condition, cracks everywhere, so thinking to replace it. But do you think I have to look somewhere else yet ?

    Sorry, not much experience with triumphs yet.

    Thank you
     
  2. Havit

    Havit Admin
    Staff Member Subscriber

    Jul 17, 2015
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    #2 Havit, Mar 26, 2016
    Last edited: Mar 26, 2016
    Yes the rubbers could be leakng , well worth changing , also check your diaphrams on the top of the carbs , my 900 T bird used to do the same (same year as yours) its fine now . Just to note, taking the carbs out is quite tight its worth changing the airfilter while your at it. Triumph want you to change the whole box which seems mad but you can buy a k&n filter to fit in the original box. If the brass screws in plastic ( not a great idea) start spinning, just drill them out and use self tappers . Best of luck .
     
  3. mixifix

    mixifix Active Member

    May 7, 2013
    111
    43
    mansfield
    Yes those intake runners are buggers at leakig when you get the bike running squirt round them one at a time use some WD 40 if bike picks up rpm then IRS pulling air in think they are about £8 plus post from world of triumph
     
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  4. Michal Augustyniak

    Michal Augustyniak New Member

    Mar 13, 2016
    3
    3
    UK
    That what I thought, and hope its just that :)

    Thank you guys !
     
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  5. sprintdave

    sprintdave Nurse, think it's time for his medications.

    May 25, 2014
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    It will be. I see youre in the USA, maybe bike bandit can help with the parts if world of triumph are too expensive with delivery charges
     
  6. PETER CLARKE

    PETER CLARKE Senior Member

    Nov 11, 2015
    301
    120
    Essex
    That is good advice mixifix.
     
  7. PETER CLARKE

    PETER CLARKE Senior Member

    Nov 11, 2015
    301
    120
    Essex
    I am not sure what is missing from your bike as I do not have this information and now carbs are off you cannot check air leaks from engine did you do wd40 test ??.
     
  8. thebiglad

    thebiglad Old fart, still riding !

    Sep 25, 2013
    5,071
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    Central France
    Hi Michal, is your bike originally a California model? If it is it will have had extra plumbing for the carbon filter canister etc which might account for some of the unplugged gubbins?
     
  9. sprintdave

    sprintdave Nurse, think it's time for his medications.

    May 25, 2014
    1,679
    750
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    Another thing to look for, there should be a long drain pipe which hangs down below the front of seat and exits by the drive chain in front of rear tyre, it should be closed off with a bung, not open. On my Sprint it made a massive difference to both slow running and starting.

    https://www.dropbox.com/s/ia2hex5rw70pip4/Triumph T300 Service Manual.pdf?dl=0

    is this the manual you have already?? .
     
  10. PETER CLARKE

    PETER CLARKE Senior Member

    Nov 11, 2015
    301
    120
    Essex
    The expansion tank on cooling system should have a open overflow the other hose Might be a engine breather hose and on uk bikes goes to air filter air box but your market may recirculate crankcase air back to to carbs for engine to burn and switched by solenoids that are energized by a electronic module at certain intervals.(sorry cannot see this hose mentioned in your picture)
     
  11. mixifix

    mixifix Active Member

    May 7, 2013
    111
    43
    mansfield
    That looks like tank breather pipe comes from under tank down between them to floor
     
  12. Havit

    Havit Admin
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    Jul 17, 2015
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    Triumph are full of suprises, thats why i love em :D:D.
     
  13. mixifix

    mixifix Active Member

    May 7, 2013
    111
    43
    mansfield
    Think if you look on world of triumph you can zoom in on the parts to work out how things go
     
  14. sprintdave

    sprintdave Nurse, think it's time for his medications.

    May 25, 2014
    1,679
    750
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