rear shock swap?

Discussion in 'Mechanics Garage' started by Jollyhart, Jan 15, 2010.

  1. Jollyhart

    Jollyhart New Member

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    Okay folks i am going to open up a can of worms here:

    1 What are the benefits with doing a swap to a 929 shock(with spacer etc..)?Do you just get rebound ajustment?
    2 Are they rebuildable? or are they the same as the stock ones?

    I have been looking at the ebay prices and they are getting pretty high for a second hand shock(in OZ)can a cbr600 shock fit the bill?they seem to be more plentiful,and a better price.When you add the heavier spring does that mean a re valve as well?

    Forgive me if i am going over old ground,but i am thinking of getting my old shock rebuilt,and have been told that that is not a good way to go.
    I have looked at the forums about the 929 shock fitting,and i am thinking that the cbr600 might be a better way to go.
    And are the adjusters easy to get to with both of the above??
    Anyone done the swap???

    So as far as i can see the options are;
    1:929 shock rebuilt with spacer.Adjustments may be needed to battery box?
    2:Cbr600 shock with heavier spring and( i presume a re-valve to suit)no body work needs to be cut?

    Sorry i should have said:i have a 2000 mdl 5th gen.
     
    Last edited: Jan 15, 2010
  2. SLOVFR

    SLOVFR Member

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    You will need to put a heavier spring in the 929 shock too but its the best bang for the buck. Also the adjustments are accessible on the 929 shock then a cbr one. And yes full adjustments available.
     
  3. Jollyhart

    Jollyhart New Member

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    Cheers mate.
     
  4. viffer93

    viffer93 New Member

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  5. Jollyhart

    Jollyhart New Member

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    Thanks mate.I brought a 600 shock.
     
  6. SLOVFR

    SLOVFR Member

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    some kids never listen. Let us know how it turns out for ya.
     
  7. JamieDaugherty

    JamieDaugherty New Member

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    A couple of things to keep in mind:

    1) A CBR600 or CBR 929 will both need heavier springs along with accomodations for the length difference to the stock VFR shock.
    2) Your stock shock already has rebound damping adjustment, what you get is compression adjustment. Keep in mind these are low speed adjustments only.
    3) Your stock shock can be rebuilt. The CBR shocks are better setup for this, but it's not really that difficult for a suspension shop to rebuild a VFR shock.
    4) A revalve will certainly help you out. That's where the real performance lies.

    Let us know what you end up with!
     
  8. Jollyhart

    Jollyhart New Member

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    I am hanging my head in shame, because the shock that I brought was never going to fit!!It is a late model cbr 600 shock with the reservior at the top!!
    Oh dear, I do rush in sometimes when I see a bargin on fleabay!!!
    I will sell it again, and see what other messes I can get myself into!!:crazy:
     
  9. crustyrider

    crustyrider New Member

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    so is it worth rebuilding the old one or going with something "better"
     
  10. Jollyhart

    Jollyhart New Member

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    I am still looking at a differant shock.Mainly because if you get the old one rebuilt than you still have 10 year old basic shock.But I still reckon that there is another shock out there that will be a direct swap with my old one.I am thinking of maybe an R1 ? I will ask at the suspension place and see if they have any thoughts.
     
  11. crustyrider

    crustyrider New Member

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    cool thanks..for the info
     
  12. JamieDaugherty

    JamieDaugherty New Member

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    Honestly, upgrading the stock shock is a great way to go. You would be surprised what a revalve would do for the performance. Replacing the piston and shim stack with aftermarket parts that are setup for you really transforms the performance of the stock unit. There is nothing wrong with the Showa piston rod, body, seal head, etc. Having the correct spring rate and good internal valving is the key to performance.

    My experiences are that a revalved VFR shock works better than a stock-valved CBR unit. I think that's the best bang-for-the-buck and something that I recommend to most street and trackday riders.
     
  13. viffer93

    viffer93 New Member

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    "Waiting to find something better". That is going to cost you more time and money. Sending a 929 shock to have it rebuild and set up to your weight is a great option.
    The shock "shell" might be 10+ year old but the guts that Jamie would replace would be new.
    Jamie knows the shock/bike and what needs to be done - A specialist you might say
    Several people have commented about how satisfied they are with his stuff.


    I spent a lot of time researching and priced out other shocks a short while back and they were all in the $700 - $1200 range and those were very good prices. I was talking to a profesional about which is better Penske, Ohlins, Wilbers... his answer "they are all aluminum bodied shocks it is what goes in that makes a difference". I think you make that argument about the 929 shock... It is old on the outside but it is what jamie would do to the inside that matters.
     
  14. Junyr

    Junyr New Member

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    What would the approximate cost be to have the stock shock on a 6th gen rebuilt for a 220lb driver?
     
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