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Advise on critical maintenance needed

Discussion in 'BNS12 Chat & Tech' started by Kuzya, Mar 20, 2015.

  1. Kuzya

    Kuzya Tuned and Synch'ed

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    Guys, not having a trustful dealer around, I'm servicing my 12S on my own so far. Having the Guzziology and this forum, still have a mess in my head on a proper amount of maintenance. What works would you recommend to perform as a must please?
    Bike is a 2008 1200 Sport 2V
    20 000 km
    Regular oil/brake/clutch fluid serviced
    Inner spark plugs changed
    Valve clearance check every 5k

    There is a chance that fork oil has been changed some 10k km ago, but unsure
    Dark garage parked - low UV environment.

    Plan to:
    TPS reset, TB balance
    Gearbox and CARC oil change

    Do you think I'd should change:

    Fork oil?
    Fuel hoses?
    Brake hoses?U

    Grease rear arm bearings?
    Fork main bearing?

    Something else important to check on a 7 YO guzzi?
    Thanks!
    Alex
     
  2. john zibell

    john zibell Moderator Staff Member GT di Razza Pura

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    Fork oil Yes
    Fuel hoses, probably not
    Brake hoses No
    Grease swing arm bearing if not already done, Yes
    Fork Bearings, maybe replace with tapered rollers, but the original bearing I believe are sealed ball bearings.
     
  3. Android

    Android Cruisin' Guzzisti GT Famiglia

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    Just replaced the swing arm bearings and all the rear suspension bearings on mine at 33,000 miles (53,000 km)
    so a clean and regrease = really good idea
     
  4. Kuzya

    Kuzya Tuned and Synch'ed

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    Thanks!
    Anything else I oversee?
     
  5. Kuzya

    Kuzya Tuned and Synch'ed

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    Is there a way to make a "soft" fork oil change, draining oil while leaving the fork mounted? If not a clever idea, than another question: the service manuals for 12S show fork oil change procedure, but seems to be another fork. Pictures are not showing the top-placed compression/rebound setting screws and their connection to fork valves. What would be the really correct oil fork change procedure for my fork?
    Fork seems to be Marzocchi, black tubes, compression/rebound setting screws present.
    Thanks!
     
    Last edited: Mar 27, 2015
  6. john zibell

    john zibell Moderator Staff Member GT di Razza Pura

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    To change the fork oil, they must be removed. Not that difficult. As far as I know, the procedure is the same.
     
  7. GT-Rx®

    GT-Rx® Administrator Staff Member GT di Razza Pura

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    The only real/complete way is to remove them, flip them over and pump them out.
    Not sure how well this would work, but if you pull the calipers, wheel and the very bottom bolts that secure the cartridges, loosen the top triple pinch bolts, then the fork caps (and at that point you're most of the way there on just removing them), then push/pump the forks sliders up and down. It just might work (in theory). It will be a very slow process as it has to push past the bottom of the cartridges. Measure the drain if you do. It should be ~440ml. If you don't get near that, you'll have to pull the forks.
    I can't recall if there was a supplement to the Breva/Norge manual.
     
  8. Kuzya

    Kuzya Tuned and Synch'ed

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    Thanks, Todd. Better dismount. But still the question is: how to change oil on this cartridge fork with minimum required disassembling. simple opening the top cap - unclear how to handle the compression/rebound setting screws...
     
  9. GT-Rx®

    GT-Rx® Administrator Staff Member GT di Razza Pura

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    It's been too many years to recall, but if the caps don't easily spin off, spin the fork tubes off the caps. And pump/empty out. It's pretty simple to do from memory.
     
  10. Kuzya

    Kuzya Tuned and Synch'ed

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    What made me curious here, to bother you with such a question, is: there must be a connection from screws for setiing rebound/compression damping to the cartridge. The screws sit in the cap. Simple cap dismount, without prior disconnection of the above mentioned connection should be likely to break something.
    Unless the adjustment screws are a pure pushing action ones, without binding to the cartridge.
    Is it a pushing action effect, or rotational one, for comp/rebound adjustments?
     
  11. GT-Rx®

    GT-Rx® Administrator Staff Member GT di Razza Pura

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    From memory, the caps are threaded to the top of the cartridges, so if it feels tight once you crack it loose, then spin the fork tubes off of the caps.
     
  12. Kuzya

    Kuzya Tuned and Synch'ed

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    Thanks, Todd!
    If i discover more details - will post here. There are people around looking for same answers, but no definite parts-based infos to be found so far.
     
  13. Kuzya

    Kuzya Tuned and Synch'ed

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  14. toma nova

    toma nova Cruisin' Guzzisti GT Contributor

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  15. Kuzya

    Kuzya Tuned and Synch'ed

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