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Low price 961

Discussion in 'Norton Motorcycles (Modern)' started by jimbo, Dec 24, 2017.

  1. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    Lipped liners can still ‘drop’ a little, especially from new, if the alloy barrel material crushes or sinks.
     
    richard-7 and comet like this.
  2. comet

    comet VIP MEMBER

    Joined:
    Aug 23, 2016
    Thanks, that makes sense. I did ask the factory at the time as I'm always interested in understanding the problem, but I didn't get that explanation.
     
  3. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    The factory does not have a good track record in fully diagnosing and explaining root cause to problems, unfortunately.

    I suspect that they think that keeping quiet will result in people not knowing. And / or not talking about it.

    I believe they are very wrong about this. I believe that when they keep quiet, they cause the very internet chat that they wish to prevent, as the self propagating nature of internet chat is fuelled by this silence, and becomes worse than it would have been given proper factory input.

    And I hope they are reading this. And I hope they re think...
     
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  4. comet

    comet VIP MEMBER

    Joined:
    Aug 23, 2016
    Something I've never been able to find out from the factory is which map I am running (SC ECU). The map has been changed a number of times (to try and fix an over-run issue) and each time I ask which map is installed I get a vague answer along the lines of "it's the latest one this year....", whereas others on the forum are quoting map numbers and BIN file IDs. Is a dealer able to tell what map is installed if I take it there instead of the factory, or do they only know if they download it?

    To be fair, the factory fixed all the major issues i.e. the ones that have disabled the bike. The remaining over-run issue is just annoying.
     
  5. Raphi

    Raphi

    Joined:
    Aug 17, 2015
    I have a 2012 CR. At that time the cylinders had no Nikasil coating yet. My cylinders were rehoned twice and today I have new oversize pistons. There is enough material left to rebore though...
     
    comet likes this.
  6. Raphi

    Raphi

    Joined:
    Aug 17, 2015
    Additional information: In spring 2014 Friz W. Egli was getting honed the cylinders of my CR 961 to a new diameter of 88.05 mm (in other cases even boring to 88.5 mm).
    Raphi, Switzerland
     
  7. Panetone

    Panetone

    Joined:
    Nov 1, 2015
    Hello,

    Thiel Motorsport in Germany have 90mm bigbore kits with forget pistons and a lot of other goods for the 961.


    Cheers
    Panetone
     
    richard-7 likes this.
  8. BritTwit

    BritTwit VIP MEMBER

    Joined:
    Aug 25, 2009
    Same size as hi-compression "clean-up" kit that was planned by SouthBay Norton (SBN) = 1005cc
    SBN said that 90mm was as large as the stock liners would safely permit.
     
  9. richard-7

    richard-7

    Joined:
    Feb 24, 2014
    There used to be options. Since 2014-2015 all Nikasil.
     
  10. richard-7

    richard-7

    Joined:
    Feb 24, 2014
    There is the map number like 077 or 091. Then there is the air box number after that, Then the revision of the map. As far as I’m aware. 0116 which was is jan 2016 is the latest for SC ECU’s.
     
  11. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    Maybe it’s because I never paid attention in German lessons (amongst others) at school...

    All I can find on their web site is links to Norton brochures etc.

    Where is the info on the fancy bits?
     
  12. lcrken

    lcrken VIP MEMBER

    Joined:
    Mar 15, 2009
    On another subject, I recently posted this item showing the quart of oil I drained out of the airbox at 461 miles

    https://www.accessnorton.com/NortonCommando/sensors-trial.23515/page-5#post-362242

    I took a little ride today and ran the miles up to 551, and did the first oil and filter change. I measured the oil I drained at 3.5 liters. That, along with the quart I drained out of the airbox gives a total of over 4.5 liters of oil. I think that pretty well explains the large amount of oil in the airbox. I refilled it with about 2.5 liters, and it still seems to be above the full mark. I'll ride it a bit and check again, and pull some out if I need to.

    It was a nice ride in our local canyons, and I'm getting more used to the bike. It handles really well, but I think I'll jack up the rear shock height adjustment a bit to see if I can get a little bit quicker turn-in and a little less push coming out of turns under power. Nice to have all those adjustments to play with. And I do have to eventually pull the bars up some more, and back a bit, or I'll end every ride with a sore neck.

    Beats the hell out of sitting in a rocker on the porch.

    Ken
     
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  13. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    Nice to hear your riding experience Ken. Please keep em coming.

    Now, when are you going to look into the cam timing of these motors and see what can be done to liberate more power...?
     
  14. Panetone

    Panetone

    Joined:
    Nov 1, 2015
    Hello,

    when liners are right mounted normally they don´t move.
    When liners are shrunken into the cylinder/barrel you must wait till they cooled down and then you must press the liners with a hydraulic press again and you will see that the liner is going down 1/10- 2/10 millimeter.
    If you do this you will never have problems.

    Panetone
     
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  15. lcrken

    lcrken VIP MEMBER

    Joined:
    Mar 15, 2009

    I put them in the press immediately after dropping the liners in, and let them cool under a little pressure. That seems to work pretty well too.

    Ken
     
  16. Son of Siredward

    Son of Siredward

    Joined:
    Nov 4, 2012
    Congratulations! You stole it! PBS
     

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