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gearbox oil in 961

Discussion in 'Norton Motorcycles (Modern)' started by trident sam, Oct 12, 2018 at 8:22 AM.

  1. trident sam

    trident sam

    Joined:
    Oct 23, 2012
    Does anyone see a problem with using a gear oil like Redline shockproof in the gear box, instead of the Norton recommended 10/40 gear oil ?
    If so , why

    sam
     
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  2. TonyA

    TonyA VIP MEMBER

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    Jan 16, 2015
    This is wet clutch approved and NOT GL5 or GL4 EP type ?
     
  3. trident sam

    trident sam

    Joined:
    Oct 23, 2012
    I think you just nailed it for me Tony.
    I'm just not used to modern bikes, and was thinking the clutch was separate.
    I'll stick to what Norton recommend.
    thanks
    sam
     
    BritTwit likes this.
  4. Fast Eddie

    Fast Eddie VIP MEMBER

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    Oct 4, 2013
    Sam, the gearbox oil is shared with the clutch and primary case. And the engine oil is separate. It’s a strange set up IMHO as it prevents choice of other gear oils.

    Whatever you put in the gearbox has to be compatible with a wet clutch.
     
  5. trident sam

    trident sam

    Joined:
    Oct 23, 2012
    Yes, the lights went on with tony's reply and thanks for making it even more clear.
    I should be a lot more savvy soon as I got all the manuals from Richard as well as the factory manual.
    It's a lot of info !!!!
     
  6. batrider

    batrider

    Joined:
    Aug 9, 2008
    My XR1200 has a similar setup with shared primary and transmission oil as well as wet clutch. I've had no trouble with the HD Formula + in there.
     
  7. Fast Eddie

    Fast Eddie VIP MEMBER

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    Oct 4, 2013
    Thanks, that looks worth trying.
     
  8. Clive

    Clive VIP MEMBER

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    Jun 9, 2017
    For those who haven't seen them there have been several posts from owners experimenting with alternative transmission oils and quite a few resulting clutch issues. My choice is frequent trans oil changes with the recommended oil but fully synth in the engine.
     
  9. trident sam

    trident sam

    Joined:
    Oct 23, 2012
    Clive,
    What oil do you use in the 961 motor, as the manual specifically warns against full Ester synthetic ?
    sam
     
  10. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    That’s interesting Sam and one has to wonder why.

    My guess is as per Comnoz’ findings in his oil testing, ie, most top end full Ester oils were surprisingly disappointing and Jim’s conclusion being that they are designed for water cooled motors and just can’t handle the heat and stresses in ‘old hat’ air cooled motors, in which, the oil breaks down surprisingly quickly.

    But... I can’t imagine why any of his top scoring oils, like Bel Ray or Klotz wouldn’t work great in a 961.
     
  11. trident sam

    trident sam

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    Oct 23, 2012
    Yes, I agree it does seem strange.
     
  12. TonyA

    TonyA VIP MEMBER

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    Jan 16, 2015
    That runs counter to all I have read. 4 ball wear test , volatility testing , and ability to stay in grade with heat and cold . I think most of you guys know what these tests are , its easy to imagine that data can be misinterpreted . I know it would confuse me . I have read good things about Amsoil BUT when the reality of multiple bikes oil changes and cost and availablity come to bear , I am using Shell Rotella T6 . There are large companies paying chemists and engineers to design this stuff. Independent labs are hired to be unbiased etc. Small lubricant companies have to compete with the oil giants somehow.
     
    Last edited: Oct 16, 2018 at 7:19 PM
  13. TonyA

    TonyA VIP MEMBER

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    Jan 16, 2015
    Could the Semi Synthetic requirement be due to Rolling Element bearing engine ? Remember that Moly-fortified grease is never recommended for ball or roller bearings because of skidding ?
     
    Clive likes this.
  14. TonyA

    TonyA VIP MEMBER

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    Jan 16, 2015
    By the way Shell Rotella T6 is Group 3 full syn. 5w40. I've been running it for more than 10,000 miles .
     
  15. Fast Eddie

    Fast Eddie VIP MEMBER

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    Oct 4, 2013
  16. Clive

    Clive VIP MEMBER

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    Jun 9, 2017
    To cover myself I asked the factory about fully synth in the engine and they said it would be ok so my take on it is so long as you go for the top shelf and don't try to save money with a budget supermarket own brand you won't have any problems. Maybe you would see a difference between the top brands if you tried to run the oil for excessively high mileages but for normal or shortened oil change intervals there will be no difference whatsoever.

    One of the top ester oils Redline, which has received mention in these forums, has a formulation for Harleys so I wonder what the issue with 961s is?
     
    Last edited: Oct 17, 2018 at 2:29 AM
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