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Project Grasshoppers Triumph Sprint ST 955i

Discussion in 'Other Projects - Other Bikes (non 250's)' started by Grasshopper, Sep 14, 2014.

  1. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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  2. kiffsta

    kiffsta Administrator Staff Member Dirty Wheel Club Contributing Member

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    why ? its not running ?
     
  3. Linkin

    Linkin The Apprentice Premium Member Dirty Wheel Club Contributing Member

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  4. Clancy1

    Clancy1 Well-Known Member

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    Sounds very nice!
     
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  5. Grasshopper

    Grasshopper Well-Known Member Premium Member Dirty Wheel Club

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    Picked up a little bargain on bumtree.... Sports exhaust specifically for Triumph 955i. The Yoshimura put on before (with Dr Murdo's kind assistance) was great in mid & high end, but caused coughing a sputtering down low... no problem now with this baby! And sounds great...

     
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  6. Grasshopper

    Grasshopper Well-Known Member Premium Member Dirty Wheel Club

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    Found a long standing annoying problem on the Triumph - running rough and hesitating under 3000 rpm.

    That's a bit of rust contaminant on the injector from Cyl 1. There was a bit covering one of the 4 holes which was the problem... blocking proper injector flow/atomisation. I had a spare injector to track this problem, so changed it and cleaned all and hey presto! Problem now gone!

    injector1.jpeg
     
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  7. Grasshopper

    Grasshopper Well-Known Member Premium Member Dirty Wheel Club

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    This is how she's meant to run:

     
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  8. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    What about the other "little problem" ? :confused:
     
  9. Grasshopper

    Grasshopper Well-Known Member Premium Member Dirty Wheel Club

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    It's not too bad, I have a plan for that... :thumb_ups:
     
  10. Frankster

    Frankster See the World before you leave it Staff Member Premium Member Ride and Events Crew

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    Does that plan involve racing?
     
  11. Grasshopper

    Grasshopper Well-Known Member Premium Member Dirty Wheel Club

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    Most definitely! :neo:
     
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  12. Grasshopper

    Grasshopper Well-Known Member Premium Member Dirty Wheel Club

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    Ok, time to repair an issue I've had for a while - air leaking noise out of cyl 1 exhaust valve, and causing occasional misfire. After much analysis and thought, reckon it to be blown head gasket between cyl 1 & 2... or crack in head???
    HGR1.jpeg
     
  13. Grasshopper

    Grasshopper Well-Known Member Premium Member Dirty Wheel Club

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    Hmmm cracked rubber hoses found when removing throttle bodies:

    HGR2.jpeg
     
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  14. Grasshopper

    Grasshopper Well-Known Member Premium Member Dirty Wheel Club

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    Cam shafts removed - head will be off tomorrow :thumb_ups::

    HGR3.jpeg
     
  15. Linkin

    Linkin The Apprentice Premium Member Dirty Wheel Club Contributing Member

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    Those broken hoses could easily be the cause of that air sucking noise.
     
  16. Grasshopper

    Grasshopper Well-Known Member Premium Member Dirty Wheel Club

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    Nah, it's not that. Definitely coming out of exhaust valve area on cyl 1. However, those broken hoses may cause problems at lower revs?
     
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  17. Linkin

    Linkin The Apprentice Premium Member Dirty Wheel Club Contributing Member

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    Definitely. That's the idle speed control / stepper motor... so split hoses mean incorrect readings, and an obvious air leak.
     
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  18. Grasshopper

    Grasshopper Well-Known Member Premium Member Dirty Wheel Club

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    Nothing appears to be wrong with the gasket....
    HGR4.jpeg
     
  19. Grasshopper

    Grasshopper Well-Known Member Premium Member Dirty Wheel Club

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    Can't visibly see any problem with the head.....
    HGR5.jpeg
     
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  20. Grasshopper

    Grasshopper Well-Known Member Premium Member Dirty Wheel Club

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    Ok then, time for a new gasket:
    HGR6.jpeg
     
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