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Reluctant starting

Discussion in 'Norton Motorcycles (Modern)' started by Fast Eddie, Apr 5, 2019.

  1. Britfan60

    Britfan60 VIP MEMBER

    Joined:
    Jan 5, 2014
    YEs. That would be me. Four time already and twice, barely half a turn to tighten it up. Put a very small drop of Loctite on and it still backed of a bit. I'm afraid of wearing out the nylon. Even tight now, I can detect a very small gap on the bottom of the flange. That should seat perfectly face to face. The hose is stiff and puts a cockeyed leverage on the flange. I guess reshaping or trimming it may relieve the pressure, but what you take off, can't be put back on. I'm having a different fueling problem now. The RPM hangs at about 1800 for a second or two before dropping back to 12-1300. Also, my MPG has dropped about 15% to about 3 mpg down from 41. And I've been riding much easier lately. Still a bit cold out.
     
  2. Clive

    Clive VIP MEMBER

    Joined:
    Jun 9, 2017
    I've had a slight niggle with cutting on the overrun under specific conditions. Can somebody who really knows explain the algorithm behind the tickover control? At what point does the ECU decide to control revs - does it only do it with the throttle at zero? Does it consider whether it is in gear with the clutch engaged (engine braking)? Does the control valve normally sit fully closed or partially open?
    When a bike is 'ticking over' fast at 2300rpm as many owners experience I am assuming that the ECU is not trying to control the idle. When I briefly had some issues it would sit at 2300rpm but if I put it in gear and let the clutch in to drop the revs as soon as they dropped below 2000 it suddenly controlled the idle perfectly - ie the ECU had enabled the idle control function.

    Any ECU gurus out there?
     
  3. Accnor73

    Accnor73

    Joined:
    Nov 28, 2018
    I did, and I tightened them before the 100 odd miles at the weekend. It was there still so perhaps I need to tighten further. It’s hard to tell how far to go, small Allen key threaded screws in to plastic. Could be easy to strip the threads.
     
  4. 2cups

    2cups

    Joined:
    Feb 8, 2018
    There is a O ring between the two parts that may help seal out the air
     
  5. Accnor73

    Accnor73

    Joined:
    Nov 28, 2018
    Is the suggestion I should separate the parts to see if an o-ring is present?
     
  6. 2cups

    2cups

    Joined:
    Feb 8, 2018
    No I just thought that with a O ring between the two parts the screws do not need to be excessively tight and this lessens the chance of stripping the threads
     
    Accnor73 likes this.
  7. TonyA

    TonyA VIP MEMBER

    Joined:
    Jan 16, 2015

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