Showa rear shock service

Discussion in 'Technical' started by bill, Oct 4, 2010.

  1. bill

    bill Ol'Timer

    My old DRZ400 needs a rear shock rebuild
    Is anyone in Thailand properly setup to service and repair Showa motorcycle shocks, and recharge with dry nitrogen ?
    If not, where's the next best/closest place I could ship it to for repair ?
     
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  3. rmbike

    rmbike Ol'Timer

    I can do them, just no facility to re gas at the moment. :sad1::

    Seen the locals use air, and of course not believing me of the dangers :wtf:

    Is it leaking :?:

    Even got a brand new one tucked away back in oz, not that its any good being there and not here :oops:
     
  4. bill

    bill Ol'Timer

    No its not leaking.
    The suspension has just got progressively harder over the years and after 65000km.
    Oil has probably turned to sludge ?

    I'm thinking if it doesn't cost too much for shipping, (perhaps without spring to reduce weight) , I could ship it to Racetech or someone similar in this region for repair
     
  5. rmbike

    rmbike Ol'Timer

    No its not leaking.
    The suspension has just got progressively harder over the years and after 65000km.
    Oil has probably turned to sludge ?

    I'm thinking if it doesn't cost too much for shipping, (perhaps without spring to reduce weight) , I could ship it to Racetech or someone similar in this region for repair
    Hmm "progressively harder" I'd be checking all the linkage bearings, if they haven't been serviced properly some or most will be shot as well imo, they are rather expensive to buy
    all the bearings, sleeves, seals and washers adds up to a lot of parts, can come in kit form, I paid around $400 for my RM.
    And no fun to fit either.

    There'd be someone in Bkk that could do the shock, whether they do it properly is another matter.

    Good luck
     
  6. bill

    bill Ol'Timer

    Yep, I should of mentioned I've already done that. Shock bearing and swingarm bearings replaced. Shock linkage bearings still OK so just cleaned and regreased.
    I'll have a word with http://www.racetech.com and see what they can do for me. Shipping costs will be a pain.
     
  7. thaicbr

    thaicbr Ol'Timer

    ship it out using Thai post. and remember to tell them that its going for repair it seems that they provide some paperwork that comes back with the item to ensure that you do not get slammed for duty by customs. Thats what my local Post office told me.

    Also it may pay to give Dirt shop a call in BKK they may do rebuilds. Or even YSS (unlikely they do other makes but ya never know)
     
  8. rmbike

    rmbike Ol'Timer

    some good guys doing it in oz, might save bit on the shipping.

    i know thai>aus 10kgs 2.5 to 3.5k bht
     
  9. BignTall

    BignTall Ol'Timer

    Bill - YSS in Bangkok can service the shock. The owner can even do revalving if you need it. Of course you want the owner to do the revalving and not their staff.

    FYI I found refrigerator repair places can pump in Nitrogen to shocks. Only problem they were only able to get my shock up to 115 pounds which is less than standard pressure. However 6 months later its still working fine.

    High end tire places are also filling tires with nitrogen as the latest fad so should be able to do your shocks no problem.

    Best of luck.
     
  10. bill

    bill Ol'Timer

    Thanks for the info everyone
    B&T, I will request a quote from YSS next week, thanks for the lead and info on nitrogen refill.

    Racetech in Singapore will service it including oil, seals, O rings for SGD280 (~USD214)
    Racetech USA website quotes USD172 for same work.
    Probably ends up the same after shipping costs. In fact, I could probably risk regular post to Singapore whereas I'd need to use EMS to USA.

    We'll see what YSS come up with next week.
     
  11. rmbike

    rmbike Ol'Timer

    Contradicting what I believed

    my Suzuki manual says
    well I'll be a monkeys uncle :shock:

    Getting it to the 130-150 psi is the challenge :?:
     
  12. DavidFL

    DavidFL Administrator Staff Member

  13. alrikki

    alrikki Ol'Timer

    I tried a tyre place for my shock.
    I wanted 142psi, but their machine stopped pumping at 120psi.
    Also I dont know if the attachment method(a regular tyre connection) loses any nitrogen when disconnected.
    As the reservoir is so small it could make a big difference,
    I have been using air for some bicycle fox shocks with no noticeable difference.
    The nitrogen however stays the same when it gets hot, whereas air acts differently
    Marzocchis roco shock was designed to use air, so it would not be so difficult and expensive to servie
    Does anyone know a place in Chiang Mai that can pump shock with nitrogen to 142psi accurately?
     
  14. bill

    bill Ol'Timer

    What about a place that services luxury car suspension.
    Some vehicles like the Toyota Lexus LX470 have pneumatic accumulators that are charged with dry nitrogen.
     
  15. Auke

    Auke Ol'Timer

    The Cockpit Tyre shop on the Hangdong Road (a bit past Lotus if you come from town) on your right hand side does do Nitrogen filling of car tyres and you could try over there. Chin (the owner) speaks good English and rides big bikes and knows what he does. They can do also wheel balancing for motorbikes.
     
  16. rmbike

    rmbike Ol'Timer

    Its not super critical as long as its around 130 + so 120 though a bit low wouldn't be a problem,
    and who knows how accurate the gauges are at those pressures when working with usually much lower amounts
    they could easily be out + - 10 %
    but your right a quick pfsst can be the difference between 140 and 100.

    The reason there is gas bladder inside a shock is that the volume inside the shock changes as the shaft moves in and out (ooh err) so before the 'De-carbon system' (separate the oil from the gas) was introduced there had to be air, inside a shock with the oil to allow for that change, which would foam up under heavy use and f00k up the shock damping.
    Now the bladder under pressure takes up the slack of that change.

    If my shock theory is still accurate in my fading mind :lol-sign:
     
  17. alrikki

    alrikki Ol'Timer

    Nat at piston shop said he could service the shock, so he must know where to get it repressurized
     
  18. alrikki

    alrikki Ol'Timer

    found a place that could refill my shock with nitrogen.
    Got it to 150psi.
     
  19. DavidFL

    DavidFL Administrator Staff Member

    Do you want to tell us which shop?
     
  20. alrikki

    alrikki Ol'Timer

    Out on the superhighway (rt11) past big C , past Rt121, on the right is a big place called Bridgestone Truck Tyre Centre
    Cost 50 baht.
    It took a few goes to get it right as they still have only a tyre line, and the reservoir is so small that you lose a lot of pressure if youcant disconnect it very quick, but they took it up to 200psi, and then I got it down to where I wanted it,
     
  21. DavidFL

    DavidFL Administrator Staff Member

    :thumbup:
     

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