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Oil pump 961

Discussion in 'Norton Motorcycles (Modern)' started by pingu-nz, Apr 5, 2019.

  1. pingu-nz

    pingu-nz

    Joined:
    Jun 24, 2011
    Rob Jameison , If you could answer this please :)

    Have there been any upgrades or changes to the oil pump over the last 5 years for the 961 ???
    Any differences between the standard and mk11 models ?


    Cheers
    Paul
     
    Last edited: Apr 6, 2019
  2. TonyA

    TonyA VIP MEMBER

    Joined:
    Jan 16, 2015
    I will say YES . But will let Rob fill in the details . My new oil pump has been wonderful , very glad I purchased and installed it !
     
    pingu-nz likes this.
  3. Clive

    Clive VIP MEMBER

    Joined:
    Jun 9, 2017
    At my last service Rob told me I have a new type scavenge pump and he was talking about drive ratios - this is related to a problem where an unusually fast and sustained high speed (emergency) blast up the motorway caused a load of oil to be liberally sprayed over the back end of the bike. Usually my oil consumption is trouble free.
     
  4. Rob Jameson - Norton UK

    Rob Jameson - Norton UK

    Joined:
    Apr 9, 2018
    Yes, the pump is different. Scavenge ratio is the same, but the tolerances in the pump are tighter and the scavenge gearotor is slightly different. Cosmetically looks very similar.
     
    Clive likes this.
  5. TonyA

    TonyA VIP MEMBER

    Joined:
    Jan 16, 2015
    Hello Clive , Are you saying that you have had the newer oil pump installed recently ? Where did the oil come from that was sprayed over the back of the bike ? The air box drain ?
     
    Last edited: Apr 10, 2019
  6. pingu-nz

    pingu-nz

    Joined:
    Jun 24, 2011
    Thanks for the reply rob ,
    Was there a reason for the changes in the pump , has it fixed any particular issue ?

    Cheers
    Paul
     
  7. Rob Jameson - Norton UK

    Rob Jameson - Norton UK

    Joined:
    Apr 9, 2018
    We just changed supplier and they are able to build the pumps to a higher quality - no other reason.
     
    Clive likes this.
  8. Clive

    Clive VIP MEMBER

    Joined:
    Jun 9, 2017
    No - my late 2017 bike came fitted with it. The oil seemed to come from the pipe which normally empties into the catch bottle but had popped off.
     
  9. BritTwit

    BritTwit

    Joined:
    Aug 25, 2009
    Rob,

    Is the one way valve now built into the pump, or still pressed-in?
     
    TonyA likes this.
  10. pingu-nz

    pingu-nz

    Joined:
    Jun 24, 2011
    That pipe drains from the airbox to the catch bottle , so is your bike getting oil in the airbox?
     
  11. Clive

    Clive VIP MEMBER

    Joined:
    Jun 9, 2017
    Guess so. I use the bike to get to work and often take a half hour motorway route and rarely see anything in the catch bottle so I don't think there is anything fundamentally wrong during 'normal' use. Maybe I'll try to persuade the wife that I need to go blasting up the German autobahns in the interest of science?
     
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  12. TonyA

    TonyA VIP MEMBER

    Joined:
    Jan 16, 2015
    I have purchased the new pump and the valve is pressed in. Of course , it was already pressed in and ready to install on the bike when I received it.
     
  13. BritTwit

    BritTwit

    Joined:
    Aug 25, 2009
    I don't think there is anything to worry about with the original oil pump.
    I had oil being blown into the air box on startup before I got the oil in airbox fix.
    I believe the problem was oil from the tank passing thru the oil pump and migrating into the crankcase while sitting for a long period.
    On startup the spinning crank pressurized the crankcase and pushed oil thru the breather - into the airbox - and out the drain hose.

    Since the one way valve was pressed into my oil pump, there has been no oil passed to my catch bottle.
    Even during periods of cruising at 90+(indicated) mph.

    Was the fix the result of the one way valve in the pump, or the one way valve placed in the oil cooler return line?
    Dunno, but the fix works.:cool:
     
  14. BritTwit

    BritTwit

    Joined:
    Aug 25, 2009
    I don't think there is anything to worry about with the original oil pump.
    I had oil being blown into the air box on startup before I got the oil in airbox fix.
    I believe the problem was oil from the tank passing thru the oil pump and migrating into the crankcase while sitting for a long period.
    On startup the spinning crank pressurized the crankcase and pushed oil thru the breather - into the airbox - and out the drain hose.

    Since the one way valve was pressed into my oil pump, there has been no oil passed to my catch bottle.
    Even during periods of cruising at 90+(indicated) mph.

    Was the fix the result of the one way valve in the pump, or the one way valve placed in the oil cooler return line?
    Dunno, but the fix works.:cool:
     
  15. MxMartin

    MxMartin

    Joined:
    Nov 13, 2017
    As you know my catch bottle overflowed at end of last year, bang on the 2k mile predicted by Olivia. This was after a sustained high speed motorway thrash and it left me with a worrying niggle all Winter whilst the bike was off the road. Yesterday I had a good 160 mile round trip to Donington for my service with varied styles of riding including a high speed burst for 5 mins or so and I have the tiniest amount of oil in my bottle. I don't know if this is the residue after emptying it myself before the run or if it is new after the service, I forgot to ask Ash at Norton if he emptied it.
     
  16. TonyA

    TonyA VIP MEMBER

    Joined:
    Jan 16, 2015
    2000 miles = 30 ml of oil in catch bottle , I would take that and be happy . That's much better than a lot of the older 961's !
     
  17. pingu-nz

    pingu-nz

    Joined:
    Jun 24, 2011
    Pricing up a new gen pump to Australia if Brisbane Motorcycles get back to me .
     
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