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Maney 920 & TTI transplant

Discussion in 'Norton Motorcycle Rebuilds' started by Fast Eddie, Feb 11, 2019.

  1. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    After a rather protracted period of collecting the parts as funds allowed and going backwards and forwards with different ideas, I’m finally on a push to get this thing done.

    Details of the prep and the backwards and forwards thinking for this can be found here: https://www.accessnorton.com/NortonCommando/920-engine-build-waffle-2016.22080/

    Long story short: the existing Jim&Jim (that’s Schmidt and Comstock) 850 engine is too good to cannibalise I decided. So it, and the stock gearbox, are coming out and being checked over to be kept as ‘ready to go’ spares.

    In their place is going a Maney 920 stage 3 motor, TTI heavy duty 5 speed box and Maney belt drive.

    First job, out with the old engine and box etc:
    FCE30570-4DFF-48F4-89B1-69446933EC7C.jpeg


    Fitting the TTI box involves removal of quite a bit of metal from the cradle. I removed the cradle from the frame to do this. Nevertheless it was still a PITA of a job!
    But with the cradle out I took the opportunity to remove powder coat from the key mounting faces, something I should have done before!
    764FDF5D-7D3B-4143-B32E-422A1512C531.jpeg


    The Maney primary drive I’ll be using in place of the Norvil kit will raise the primary gearing a little, so I’ve gone down one tooth on the gearbox sprocket (from 22 to 21):
    0F078DFA-ACA8-48A7-AD04-0DCE5D8332C9.jpeg


    I fitted a black finish carbon front mudguard last year and the miss-match with shiny polished stainless rear one bothered me. So I made it black whilst it’s down this far. I also scotchbrited the hitherto shiny alloy rear light as part of the overal de-blinging exercise:
    1F9A0F1F-6EE8-4481-AAB0-563EA5724490.jpeg


    I want to go from an ‘across the frame’ battery tray style to an ‘in line’ style so that I can shuffle things around. Motivation for this is I intend to use a high level 2:1 Maney style exhaust pipe and want to mount the side panel a little further in, away from the exhaust (the frame isn’t as bad as it looks in this pic honest), here’s the first steps to re-arrange the battery tray area:
    3B16C72F-0B8F-4EF3-8B98-56225D9D2BE2.jpeg


    I dropped the empty Maney cases in today to make sure the engine and cradle fit together nicely, which they do.

    The cylinder head is being sent away for tumble cleaning now.

    Next job on the chassis is getting the rear wheel in (as soon as AN pull there finger out).

    Next job on the engine is to start assembly of the bottom end.
     
    Last edited: Feb 11, 2019
    swooshdave likes this.
  2. Brooking 850

    Brooking 850 VIP MEMBER

    Joined:
    Oct 3, 2011
    Nigel, I run a Maney belt drive in both the Roadster (4 speed AMC box) and the race bike (5 speed TTI) with 21 tooth sprockets.Race bike rear sprocket is modified to take different size sprockets for different tracks with 44 tooth being the smallest I can fit.
    2 x other mates also have Steves primary drives in their Roadsters and we all find first gear a bit taller than say the Norvil or standard set up with 42 tooth rear sprocket.
    Certainly nothing to worry about and the point being that at 4000rpm (or very close to it ) you will be loping along at 70 mph.
    With the race bike, the hi torque motor makes for good starts with the taller gearing, so your monster motor wont have an issue
    Regards Mike
     
  3. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    Good info Mike, thanks.
     
  4. gortnipper

    gortnipper VIP MEMBER

    Joined:
    Nov 11, 2013
    How did you handle moving the dzus fastener? Redrill? Or are you just leaving it where it is?
     
  5. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    Gortnipper, I don’t have a dzus fastener. I have an oil tank silentblock type bobin.
    Two holes on the bracket allow for stock location or 1” inboard for extra clearance with the high level pipe.
    DC9C1A14-D6E9-4ED9-B2C8-D054D67343D9.jpeg
     
    Last edited: Feb 13, 2019
    MichaelB and gortnipper like this.
  6. storm42

    storm42 VIP MEMBER

    Joined:
    Jul 20, 2011
    Will the drive chain line up with the flat front sprocket?
     
  7. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    Dunno yet...

    Why do you ask Ralph, are your sprockets different? I’ve just got what it came with.
     
    Last edited: Feb 12, 2019
  8. storm42

    storm42 VIP MEMBER

    Joined:
    Jul 20, 2011
    I do run with an offset sprocket to clear the 130 rear tire, it was that or space the gearbox over. I asked because I have in my head that the standard Norton is offset. You might be able to do something with the rear sprocket when you change it for a 520 chain.
     
  9. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    It’s a roller!

    AN engine replacement jig is SO handy!

    Rear wheel set up consists of hNw 520 chain kit with drum, Madass one piece axle and modified cNw speedo sensor mounting hardware and spacers... what could possibly go wrong...?

    Well, after removal of the dreaded powder coat from all relevant surfaces, it all went together nicely, a tight fit, but a good fit.

    And much to my relief, the chain alignment is cock on.

    It’s nice when things go well, but it always leaves me feeling nervous...!


    5DB457EA-C47F-43A8-88FB-A77E9F54BCCB.jpeg 28F567E4-5CEC-4F5A-8F25-0CA7C1612ED5.jpeg
     
    Last edited: Feb 13, 2019
    Time Warp likes this.
  10. Dommie Nator

    Dommie Nator VIP MEMBER

    Joined:
    Apr 2, 2013
    Any reason your rear axle nut is on the right hand side? I know it's a one piece from Don, I have one too.
     
  11. lcrken

    lcrken VIP MEMBER

    Joined:
    Mar 15, 2009
    Very nice, Nigel. I particularly like your side panel mounting solution.

    Ken
     
  12. acotrel

    acotrel

    Joined:
    Jun 30, 2012
    The last time I raced, I was using a 4 speed Norton box with a close ratio gear set. My overall gearing was very high, but once the bike was mobile it was perfect everywhere. First gear in that box is higher than that in Manx. In my first three rides that day, I could not get a good start, but was still up with the leaders. In the last race I got brave on the start live and revved the tits off the motor and jumped as quickly as the others. I then turned under the leaders on turn two. With your TTI box, because it is 5 speed - first gear will be lower. And the mainshaft in the TTI box is about 6 mm thicker.
     
  13. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    Because I can leave the shaft in the drum when removing the wheel and still have (albeit slightly wobbly) the QD wheel functionality.

    This is particularly handy as the chain is riveted instead of having a split link.
     
  14. gortnipper

    gortnipper VIP MEMBER

    Joined:
    Nov 11, 2013
    This is how I did it too with Don's axle.
     
  15. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013

    Great minds think alike...
    Or
    Fools seldom differ...

    Delete as appropriate!
     
  16. gortnipper

    gortnipper VIP MEMBER

    Joined:
    Nov 11, 2013
    Better to be lucky than good...
     
  17. Dommie Nator

    Dommie Nator VIP MEMBER

    Joined:
    Apr 2, 2013
    I thought it might be, it works in a fashion then.
     
  18. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    In a fashion yes. Enough to hold things in place.
     
    Dommie Nator likes this.
  19. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    Yeah but, when ever I get a dose of good luck I’m immediately on the lookout for the incoming dose of bad luck...!
     
    gortnipper likes this.
  20. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    Speedo sensor set up all worked out nicely:

    AAE7213E-D645-41CB-8AF2-D11C566FA22B.jpeg 63B26EAD-2F09-4C4C-A892-0D586EB0838F.jpeg
     

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