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961 sensor thread

Discussion in 'Norton Motorcycles (Modern)' started by Fast Eddie, Aug 7, 2019.

  1. comet

    comet VIP MEMBER

    Joined:
    Aug 23, 2016
    Interesting, there was some discussion about this in October last year:
    So it appears Norton have reviewed this and changed the sensor. Do you have any details for the replacement?
     
  2. TonyA

    TonyA VIP MEMBER

    Joined:
    Jan 16, 2015
    Good news . Are these compatible with the older machine too ? I am inclined to think yes. Thanks for the info. Let us know.
     
  3. Clive

    Clive VIP MEMBER

    Joined:
    Jun 9, 2017
    Hi - I seem to remember that these are an alternative manufacturer to Bosch - maybe Honeywell. I will try to find out from Max.
     
  4. Clive

    Clive VIP MEMBER

    Joined:
    Jun 9, 2017
    Apparently the head temp sensor is a Jumo which has a stainless body and a higher temperature rating. Thanks to Max for that.
     
    MxMartin likes this.
  5. TonyA

    TonyA VIP MEMBER

    Joined:
    Jan 16, 2015
    The reason we purchased Bosch in the first place was because we could not get these from Norton . If we order the new temp sensor from Norton then we will get the Jumo . So thats what I will do. So Clive is the bike working well now ?
     
  6. comet

    comet VIP MEMBER

    Joined:
    Aug 23, 2016
    I'm interested to know which Jumo sensor. It was only by looking at the spec of the Bosch one that I could see that the temperature range might be an issue. Looking at the Jumo catalogue I'm assuming it's this one:

    Jumo-temp-sensor.JPG

    As far as I can see, the specification is different (PT100) so the resistance at a given temperature is not the same as the Bosch one (or is it?). If the resistance properties are not the same I assume the ECU data would need to be changed to reflect this.

    I could be completely wrong here, I'll defer to the more technically-minded contributors.
     
    TonyA likes this.
  7. Deano

    Deano

    Joined:
    Jul 24, 2019
    Getting back to the question of EFI vs carburettors (notice the correct spelling there.! ;)), the biggest issue I can see with EFI apart from all the potential sensor failures, is the way it's mapped to run lean for emissions compliance etc. At least with carbs you can easily adjust the idle mixture strength & tickover so it doesn't stall in traffic. By any standards, that's pretty poor in this day & age. I've never needed an electric boot on my bikes as much as I do on my 961... :rolleyes:
     
  8. TonyA

    TonyA VIP MEMBER

    Joined:
    Jan 16, 2015
     
  9. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    It’s not mapped overly lean with the after market maps for de cat and / or open pipes. Also, people have had good results with the PowerCommander, Ollie Thiel fits these BTW...
     
  10. BritTwit

    BritTwit VIP MEMBER

    Joined:
    Aug 25, 2009
    This will always be the Achilles heel of the 961 with the single IAC air tube design of it's throttle body.
    Adding a PC will help overall performance on bikes with custom exhausts, but can't do much for the idling issues.
    The PC also adds another layer of complexity to the bike's operation.
    The price of unlocking the SC ECU is around $300, and I can then use standard software to change the 961 map settings.
    I have a dyno tuner here on Long Island that I trust, who is willing to dial in the SC ECU.
    At that point the new map settings and hopefully the IAC settings will produce a much better starting/running machine.

    A 961 with Keihin injectors/throttle bodies, and rubber insulated intake manifolds would have none of the running issues.
     
  11. MxMartin

    MxMartin

    Joined:
    Nov 13, 2017
    My head temp sensor was swapped at the last annual service, the only thing I gleamed was that it was stainless and more durable than what was fitted.
     

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