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Drouin (2017)

Discussion in 'Norton Commando Motorcycles (Classic)' started by Bruce MacGregor, Oct 31, 2017.

  1. Bruce MacGregor

    Bruce MacGregor

    Joined:
    Sep 15, 2005
    Hi, I'm having a hard time navigating the new format.

    But My Drouin is still running strong.

    No problems but after a long rest, it needs a shot of starting fluid to save my legs but once started it will start usually start 1 st kick for daily runs.

    The only problem I have is the Duc & Norton are different foot / clutch so i usually take out the Duc.

    When I do ride the Norton it"s a Trip. Almost the same acceleration as the Duc, It feels like 1/2 size compared to the ST3S

    Bruce MacGregor
     
    Craig likes this.
  2. DoubleTrouble

    DoubleTrouble VIP MEMBER

    Joined:
    Jul 18, 2014
    Hello Bruce
    I'm Peter from Germany. I'm following this Drouin thread since a while.
    As I am now a proud owner of one of these, I would like to know where to get new bearings from.
    Are there any alternatives to the Barden bearings?
    Best regards from Duesseldorf
    Pete Drouin Olympia 3.jpg
     
  3. baz

    baz VIP MEMBER

    Joined:
    May 26, 2010
    The type you have bis a twin belt it's the earlier version than Bruce has
    The bearings are unobtainable as far as I know
    Are you certain your bearings are shot?
    You can prize the side plate off and pack with silicone grease if they are serviceable
     
  4. Deckard

    Deckard

    Joined:
    Jun 18, 2009
    Best advice I have about riding both of these is to put a GT shifter on the Duc, so at least it's the same pattern, just a different foot. The Norton gearbox is sooo much nicer on your foot!
     
  5. DoubleTrouble

    DoubleTrouble VIP MEMBER

    Joined:
    Jul 18, 2014
    Just a question from a Drouin newby: Is there a way to tension the toothbelt of a 2 belt Drouin?
     
  6. Bernhard

    Bernhard

    Joined:
    Apr 20, 2011
    Hello Bruce I'm Peter from Germany. I'm following this Drouin thread since a while. As I am now a proud owner of one of these, I would like to know where to get new bearings from. Are there any alternatives to the Barden bearings? Best regards from Duesseldorf Pete

    I can only suggest you remove the bearings and look on the side for the bearing part number, then go to a bearing factor supplier and ask if they have any the same. HTH
     
  7. baz

    baz VIP MEMBER

    Joined:
    May 26, 2010
    Nobody makes these bearings anymore
    And the problem with them is the bearings have a ceiling of 20.000 rpm but the supercharger can run up to nearly 40.000 rpm
    The answer for bearing life could be deep groove ceramic bearings
    If you could persuade a manufacturer to make you some!!
     
  8. dynodave

    dynodave

    Joined:
    May 28, 2003
    https://www.bardenbearings.com/content.barden.us/us/products/products_1.jsp
    division of FAG/INA bearing
    Broken link removed
    Part of Schaeffler Group
    Barden is in Danbury Connecticut, just up the road from my home town. They are still there and I need a half dozen of their turbine bearings @ were about $175 each, ceramic over $250 each. I have 3 drouins to get running....
    I was under the impression they were rpm limited based on the grease specified. 60,000 rpm sounds better to me...
    Norton Drouin Super Charger: http://atlanticgreen.com/ndsc.htm
     
    Last edited by a moderator: Mar 14, 2019
  9. jimbo

    jimbo VIP MEMBER

    Joined:
    Sep 25, 2004
    Are there single belt type , belts available?
     
  10. jaydee75

    jaydee75

    Joined:
    Jul 2, 2012
    I never thought I would see the phrase "40,000 rpm" in a Norton thread!

    Jaydee
     
    NPeteN and Gadge like this.
  11. jimbo

    jimbo VIP MEMBER

    Joined:
    Sep 25, 2004
    Looking for a Drouin setup, does anyone know of one? I had one bought but the ebay seller reneged on the deal I wonder why....

    droiun boughtaaaaa.jpg
     
    NPeteN likes this.
  12. acotrel

    acotrel

    Joined:
    Jun 30, 2012
    Hobot was big on superchargers.
     
  13. Dances with Shrapnel

    Dances with Shrapnel VIP MEMBER

    Joined:
    Jul 8, 2011
    The following is a general statement that from what I have seen on bearing speed ranges, grease is for low speed extreme loads (ie. steering head and swing arm spindles). For extreme higher speeds, bearings perform better with oil misting. I think it has something to do with the amount of work the bearing would have to do to “push” the grease out of the way coupled with the rate it is doing the work “power”. The resultant heat would cook the bearings.

    With misting, lubrication has a chance to get where it is needed whereas there’s no practical way that I am aware of (other than maybe a drilled feed through the race) where a minimal amount of grease could be introduced to the rolling elements.

    I do recall that the bearings on my Drouins had some sort of metal shield but I never opened them up to inspect.
     
  14. dynodave

    dynodave

    Joined:
    May 28, 2003
    C101FFTx1K3
    Oil is 89,000 and the G18 grease is for a measley 70,833.
    I think we figured 40,000 seemed to be the working speed
    I'd be looking for the ceramic version...
    Oil misting would have to be designed and engineered into the system. I have thought plenty about this...
     
  15. Dances with Shrapnel

    Dances with Shrapnel VIP MEMBER

    Joined:
    Jul 8, 2011
    I would go ceramic, even if it required some machining. Never really looked into it.

    From recollection, and as an example, the NJ306E has a catalog limiting speed of around 10,000 rpm and they recommend oil misting lubrication. For all intents and purpose, the Commando main bearing lubrication is misting............once you get past wet sump conditions.
     
    dynodave likes this.
  16. jimbo

    jimbo VIP MEMBER

    Joined:
    Sep 25, 2004
    Is there someone sitting on one of these , and "will get around to it someday" that might let it go?
     
  17. batrider

    batrider

    Joined:
    Aug 9, 2008
    According to the old instructions, he wanted you to balance the compressor rotor at 7 times engine speed = 49,000 RPM! It must've been way out of balance because a lot of material was removed from the one my room mate had.

    The whole unit ended in the trash a couple years later. He thought it was a good place for it after a year or two of fighting with it!
     
  18. jimbo

    jimbo VIP MEMBER

    Joined:
    Sep 25, 2004
  19. baz

    baz VIP MEMBER

    Joined:
    May 26, 2010
  20. jimbo

    jimbo VIP MEMBER

    Joined:
    Sep 25, 2004
    OK heres goes nothing.......
     
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