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Hot and cold starting...

Discussion in 'Norton Motorcycles (Modern)' started by iwilson, Oct 1, 2017.

  1. contours

    contours VIP MEMBER

    Joined:
    Jan 1, 2012
    I'm not sure if I missed it in the sensor trial thread, but how much thermal grease is enough? My original head temp. sensor was really stuffed with it.
     
  2. richard-7

    richard-7

    Joined:
    Feb 24, 2014
    Just smear it all over and a blob on the tip. It will mix with what’s already in there.
     
  3. contours

    contours VIP MEMBER

    Joined:
    Jan 1, 2012
    Good - that's what I did.
     
    richard-7 likes this.
  4. wuzil

    wuzil

    Joined:
    Feb 19, 2009
    I had this starting problem recently, ok when cold but reluctant or refuses when warm. Facebook 961 page had an article about bad connection on the crank rotation sensor (black thing on the rain swept front of the engine). Pulled the plug and saw it had started to corrode so cleaned up, dialelectric grease into the nooks and crannies and problem solved. Apparently crank sensors can be affected by temperature .
     
    richard-7 and contours like this.
  5. contours

    contours VIP MEMBER

    Joined:
    Jan 1, 2012
    Good to know. I haven't replaced that sensor yet. I don't ride in wet conditions, but maybe moisture in general can affect it ?
     
  6. contours

    contours VIP MEMBER

    Joined:
    Jan 1, 2012
    I'm going to replace the crank position sensor before I take 'er out for a ride again. I don't know if it will help, but the warm engine start up problem is pretty annoying now. :mad:
     
  7. richard-7

    richard-7

    Joined:
    Feb 24, 2014
    Also try cleaning airbox temp sensor with alcohol. That always made my bike start easier
     
  8. contours

    contours VIP MEMBER

    Joined:
    Jan 1, 2012
    Will do.
     
  9. touring27

    touring27

    Joined:
    Feb 24, 2014
    Davide from Italy

    I Had the starting problem on the moornig at 6 deg. celsius. I don't understand if I change the originals sensors with a Bosch cam sensor 0232 103037 and head temp Bosch 028 013006,only original parts.I solve the problem of cold starting . Normally I dont' connect the battery at the charge when daily use 961.
     
  10. contours

    contours VIP MEMBER

    Joined:
    Jan 1, 2012
    I suspected my battery for a short while because I can't keep it on a charger. I was routinely jump starting after it sat for more than a day. But the last two times it started up with one stab - cold without the jump start battery. So my starting issues must be due to improper fueling after the engine is warm. In fact, when it takes several attempts the way it does the gasoline smell is pretty strong.
     
    Last edited: Oct 25, 2017
  11. Raphi

    Raphi

    Joined:
    Aug 17, 2015
    Did you check or change head temp sensor, yet?
     
  12. contours

    contours VIP MEMBER

    Joined:
    Jan 1, 2012
    Yes, I did. I believe it helped the cold start issue and replaced it with warm start issue.
     
  13. BritTwit

    BritTwit VIP MEMBER

    Joined:
    Aug 25, 2009
    It would be wonderful if someone included photos of the installation process.
     
  14. richard-7

    richard-7

    Joined:
    Feb 24, 2014
    I’ll try to get to that. It simply threads out and the new one back in. Even just unthread yours and put back and you will see there is nothing to it. No oil will pour out. Nothing to fear.
     
    Britfan60 likes this.
  15. contours

    contours VIP MEMBER

    Joined:
    Jan 1, 2012
    Your reply brings me to ask one question. What part of this sensor so delicate as you described in your manual. I was fairly apprehensive about even touching the damn thing. When I went to swap it out I was very careful. But afterward I found myself wondering what part pf it could be messed up by bumping it. Just a question.
     
  16. richard-7

    richard-7

    Joined:
    Feb 24, 2014
    Ahh. The plastic to the brass. If you twist it, you’ll break it.
     
  17. contours

    contours VIP MEMBER

    Joined:
    Jan 1, 2012
    Thanks for the explanation, Richard.
     
  18. Britfan60

    Britfan60

    Joined:
    Jan 5, 2014
    I'm just keeping my new sensors as spares for the moment. Other than an increase in rpm when hot (1600) the bike is starting and running really well. Don't want to fix what aint broke.
     
  19. richard-7

    richard-7

    Joined:
    Feb 24, 2014
    Fair enough but the head temp sensor is way more responsive. Take both out hook up to a multimeter. Get a hair dryer and watch. Then you may end up using the bosch. As for the cam. Same thing and get a peice of steel and place it at an exact distance and compare both sensors.
     
    contours likes this.
  20. Britfan60

    Britfan60

    Joined:
    Jan 5, 2014
    I must have missed where it makes such a huge difference in performance. I thought durability was the main issue. Ok then. I'll get around to it. Thanks, Richard.
     

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