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Hunting and High idle permanent fix! - TRIAL

Discussion in 'Norton Motorcycles (Modern)' started by richard-7, Sep 14, 2018.

  1. Accnor73

    Accnor73

    Joined:
    Nov 28, 2018
    I’ve only ridden mine twice since I bought it and yes, guess what on the second longer run it was idling high, above 2k and not dropping.

    I was reading another post on this and it talked about a Richard-7 manual. What’s that please, and where should I find it? Thanks.
     
  2. TonyA

    TonyA VIP MEMBER

    Joined:
    Jan 16, 2015
    Go to CNW and download Richard-7 manuals.
     
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  3. BritTwit

    BritTwit

    Joined:
    Aug 25, 2009
    Quickly, you may want to check if the allen bolts holding the throttle bodies to the head are tight.
    Britfan found loose throttle body bolts to be the cause of his idling issues.
     
  4. 2cups

    2cups

    Joined:
    Feb 8, 2018
    What about checking the two IAM bolts if they are loose that may also affect the idling revs I believe
     
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  5. comet

    comet VIP MEMBER

    Joined:
    Aug 23, 2016
    It was Richard-7 who found the loose throttle body bolts. He discovered that on some bikes the bolts were bottoming out before fully tight i.e. threaded hole not deep enough. Adding a washer to each should solve that. There's also a gasket that acts as a heat insulator between the throttle body and the cylinder head. It is mentioned earlier on in this thread. Worth fitting if you haven't already got it - not all bikes have it.

    Britfan found that the two bolts holding the idle-air-control-valve (IAM) were loose.

    In both cases this would allow an air leak that would mess up the tickover.

    If it only happens on longer runs i.e. hotter engine, it could be that the heat is causing the IAM to bind and stick open - it's only plastic. Another reason for fitting the heat insulator gasket.

    What year bike do you have?
     
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  6. Accnor73

    Accnor73

    Joined:
    Nov 28, 2018
    Thanks for the replies. It’s a 2014 bike.

    It’s all new to me and i’m on a massive learning curve. I’m not a mechanic but do have related experience and more than happy to get dirty hands.

    I know it’s off topic but this is a serious event riding this bike. I had thumbs up from passing cars, kids waving at lights, traffic letting me out..... it goes on. Loving it and coming from sports bikes I find the cafe racer a familiar place to be. Also pinpoint steering, and hot brakes, great sound. Wonderful thing.
     
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  7. BritTwit

    BritTwit

    Joined:
    Aug 25, 2009
    Sounds like you've been bitten alright.
    Cheers.
     
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  8. comet

    comet VIP MEMBER

    Joined:
    Aug 23, 2016
    If you've got the SC ECU (rather than the Omex ECU) then I've got the software and connector to hook it up to a laptop. It allows the throttle butterfly (and hence the tickover) to be properly set by following the procedure provided by SC. Of course, if there are issues such as air leaks or sticking IAM then those need to be resolved first.

    The software also gives you visibility of various sensors etc such as operation of the throttle position sensor, cylinder head temperature sensor and the lambda sensors.

    I'm making an assumption about where you are based in the South East. I'm near Gatwick.
     
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  9. TonyA

    TonyA VIP MEMBER

    Joined:
    Jan 16, 2015
    IMG_3162[1].JPG IMG_3163[1].JPG IMG_3164[1].JPG

    Finished !
    The heat insulator is a full 2mm thick. Its an easy job really , make sure you have long ball allen wrenches for some of the tighter spaces.
     
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  10. BritTwit

    BritTwit

    Joined:
    Aug 25, 2009
    Tony,

    Looks pretty straight forward.
    Did you have to disconnect the airbox hoses from the throttle bodies to get the clearance for the insulator gasket to go in?
     
  11. TonyA

    TonyA VIP MEMBER

    Joined:
    Jan 16, 2015
    Yes , Drop the air box down and back a bit.
     
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  12. richard-7

    richard-7

    Joined:
    Feb 24, 2014
    Good work Tony
     
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  13. Accnor73

    Accnor73

    Joined:
    Nov 28, 2018
    Excellent, that sounds great and a lovely offer if I need it and i’m less than half an hour away, just outside Brighton. Thank you.

    I’ll have a look at those bolts etc and nip them all up. I presume no need to get too obsessed with torque values if just nipping up anything loose?
     
  14. TonyA

    TonyA VIP MEMBER

    Joined:
    Jan 16, 2015
    Hello Richard-7 , You and Dad taught this man to fish , Now I can feed myself ! Thanks again .
     
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  15. Britfan60

    Britfan60 VIP MEMBER

    Joined:
    Jan 5, 2014
    Comet is correct. I found the IAM screws loose....twice. First time was 3 years ago, so I had forgotten. Also, second time was only one screw, only 2 turns was enough to allow the IAM flange to get cocked ever so slightly due to the stiff hose attached to it.

    Also, it would only high idle usually after a good highway run, although once in a while, street riding too. I'm assuming this was my problem because after tightening the screws and doing 4 or 5 highway funds for a few hundred miles, the problem has not appeared. Ya can't blame me for still being skeptical though. Takes a while for me to regain my confidence.

    Nice job on the gasket, Tony. Really seems to make sense having that instead of metal to metal.
     
  16. TonyA

    TonyA VIP MEMBER

    Joined:
    Jan 16, 2015
    A drop of purple loctite (low strength) should keep those screws in place.
     
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  17. speirmoor

    speirmoor VIP MEMBER

    Joined:
    Apr 11, 2010
    Whats the part # and where did you get it?
     
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  18. TonyA

    TonyA VIP MEMBER

    Joined:
    Jan 16, 2015
    Email Rob at Norton Motorcycles and order it. This is a Norton part , it's not aftermarket . Or get the part number and order through your closest dealer if you have one. Sorry I dont have the p/n if I find it will post it. Tony
     

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