790 Adventure R Suspension Mods

Discussion in 'Parallel World (790/890)' started by windblown101, Jul 5, 2019.

  1. Toddv

    Toddv Long timer

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  2. scaryfast

    scaryfast Strugglin' to be Average!

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  3. windblown101

    windblown101 Long timer Supporter

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    If what they are selling is what's in the photo then yes it fits all WP Xlor Dirtbike forks. They show an externally adjustable base valve which does not work with the 790ADVR forks. Lots of similar kits out there for the dirtbike side. I used a Ktech kit (for dirtbike forks) as a basis for my fork revalve. Gave the bottom adjusters (less the pistons) to a friend.
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  4. Toddv

    Toddv Long timer

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    Gotcha, thanks. So you could maybe just preset the base valve to a certain setting and drop it in without the adjuster?

    I did put a message in to them about it.
  5. WI-790R

    WI-790R Been here awhile

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    Is anyone here, or know of someone who is selling a proven shim stack and modification information, for the 790R shock, to decrease the harshness? I read this entire thread with interest, and pm’d Torque a week or so ago, but have not gotten a reply.

    I don’t have easy access to much offroad riding. Most miles are small backroads, paved and gravel, riding either solo or with my wife as passenger. With gear, I’m about 180lbs; wife is 130. As it is now, with HS compression set to minimum, hitting a big pot hole for example at 60mph is handled OK by the forks, but the rear is very harsh. I’ve got 2450 miles on it now.

    My 500 EXC-F rides very plush compared to the 790R.
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  6. windblown101

    windblown101 Long timer Supporter

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    The rear is harsh on sharp edged hits. I imagine Torque can get it set up for you. If I were to take a guess I'd say when loaded up as described you're far into the shock stroke and that is contributing to the harshness.
  7. Torque

    Torque Been here awhile

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    Springs are always the first thing you do. A variable is almost mandatory for you if you want enough range to ride single or two up. That will be a solid improvement and for exactly the reason windblown101 mentioned. If you want to go to the next step Drill a 1.2mm bleed in the shock piston. This will also reduce the chances of blowing seals. Make sure you check the piston does not have a bleed already as I have seen some that may have been into a WP service center with the bleed already drilled. Sorry I did not get back to you just have to prioritize for existing customers and then I forget sometimes in the juggle.
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  8. WI-790R

    WI-790R Been here awhile

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    I hadn’t mentioned that I’d installed -30mm progressive springs front and rear, from touratech. That puts it farther into the stroke too I suppose. So the damping is somehow progressive with the depth of stroke?
  9. Torque

    Torque Been here awhile

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    What spring rate?
  10. Torque

    Torque Been here awhile

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    -30mm does that mean shorter than stock? Did you shorten the shock and forks to match the springs?
  11. WI-790R

    WI-790R Been here awhile

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    No worries Torque, I understand you would be very busy! As I remembered to mention in my later post, I have the -30mm touratech spring installed. The slightly lower ride height works better for me than the stock height. Does that spring have to go, in your opinion?
  12. WI-790R

    WI-790R Been here awhile

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    Yes, the forks have the progressive “-30mm lowering version” as part of the touratech kit. I believe the geometry is good’ it has a nice feel while cornering, etc.
  13. WI-790R

    WI-790R Been here awhile

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  14. Torque

    Torque Been here awhile

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    So when you unload the forks the springs are loose to rattle around in the forks??? I do not want to tell you to start over as I know you spent money. Guess the first thing to do is give me the rear spring rates and start there.
  15. Torque

    Torque Been here awhile

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    Ok I read the link you sent. The springs are not shorter just very soft in initial 30mm. But no spring rates given.
    If you send me the spring I will rate it for you n/c in 10mm increments to see what the heck it is.
    So if you are 150lbs the spring works and if you are 250lbs with a passenger the spring works. Simply untrue!
    Shortening a bike is expensive so I fully understand why they sell product.
    With correct springs, shortening spacers in forks and shock, full service with seals, fluids and chrome tube polishing, vacuum bleed nitrogen all in it costs $600 to $700
    To make springs that were soft in initial stroke as they have done, to lower a bike, you need do it with a full range of spring rates. Every 15 to 30lbs or so, different rates.
    Maybe that is why they supply the "Lubricating Paste"
  16. WI-790R

    WI-790R Been here awhile

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    Springs free to rattle around at full extension wouldn’t be ideal would it! No, they are wound very closely spaced for the first bit of length, such that the weight of the bike compresses that portion. There is some preload on the spring at full extension, both in the forks and in the shock. It’s not a lot in the rear however; I jacked the bike up just now, to photograph the hyperpro part number on the spring, and found I can rotate the spring with my hand, with moderate force.

    I will try to find the rear spring rate. Thank you.
  17. offroadjunky

    offroadjunky Been here awhile

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    The shock will never ride decent until you have it revalved,I haven't seen any diy shim stacks but I sent mine out and it was the best thing I did for the ride.The shock actually works on wash board and sharp bumps now.
  18. WI-790R

    WI-790R Been here awhile

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    The lube they include is just for the fork seals, behind the dust caps. I believe it’s a synthetic grease.
  19. WI-790R

    WI-790R Been here awhile

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    I’ve been reading that a lot, and agree based on how mine rides. I would send them off after the riding season maybe. Was hoping to do the work myself not so much for money saving, but for basically no down time. On my snowmobiles I would change oil & re-charge the shocks in an evening for example.

    edit to add: Those skidoo shocks’ clickers generally covered a wide enough range that I never felt a need to change shim stacks. The skidoo racing manuals had quite a bit of shim stack information, with tables recommending stack make up for various rider weights and conditions.
  20. braaap!

    braaap! Long timer Supporter

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    @Torque .... Might you have recorded the weights of both the forks and rear shock perchance?
    I’m working on a plan to ship you my parts for tuning and the 30mm stretch :deal

    Cheers!