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Old 06-09-2013, 06:16 PM   #1
bruceca2002 OP
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KTM 690 Suspension

I picked up a new 690 and so far I love the bike except for the suspension. Riding over wash board is brutal and I need help from some suspension experts. I weigh 260 pounds and so far all I have done is put a stiffer spring on the shock and turn out the front and rear compression damping screws. Any info is appreciated. Cheers, Bruce
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Old 06-09-2013, 07:16 PM   #2
DirtSolace
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at 230 lbs (with gear) and a 8.8 Slaven spring. I have gone in the soft direction and gotten way better performance than when I had everything tight... In phases (after new spring) I've gone from 13 clicks to 20 and it feels lighter and turns better--yet, it does not feel soft....
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Old 06-09-2013, 11:53 PM   #3
Yellow Pig
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The front sucks and is set-up for street riding. in my opinion a re-valve is mandatory. The rear is OK, just needs a heavier spring.
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Old 06-10-2013, 03:28 AM   #4
CanadianX
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could also try changing the fork oil to a heavier weight.
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Old 06-10-2013, 05:14 AM   #5
NovaMoto
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Once you re-valve the front and select springs for your weight it becomes a different bike. That is a >1,000$ solution though if you can't do the work yourself!
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Old 06-10-2013, 05:56 AM   #6
Bill the Bong
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Try 5w fork oil with an air gap of 110-115mm. Compression completely open, then in 2 - 3 clicks. Rebound 10 to 15 clicks open.

Rear - try to get balance with the front

By the way, it becomes better just before its time for a rebuild...
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Bill the Bong screwed with this post 06-10-2013 at 06:03 AM
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Old 06-10-2013, 08:11 AM   #7
gen
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Rally Raid UK is reporting that Tractive is preparing a new shock for the 690 with travel up to 300mm.

http://www.rally-raidproducts.co.uk/...in-production/

But for someone who's 230# (I am too) you'll need to have a stiffer spring to start.
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Old 06-10-2013, 10:41 AM   #8
Albie
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Quote:
Originally Posted by NovaMoto View Post
Once you re-valve the front and select springs for your weight it becomes a different bike. That is a >1,000$ solution though if you can't do the work yourself!
Not if you find a good suspension shop that doesn't feel the need to rape you.
Revalve forks, and shock, respring shock (fork springs are way stiff enough for most riders), cost me less then $500 from SMS Racing.
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Old 06-10-2013, 10:58 AM   #9
brianpc
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Anybody have measurements for the heavier rear spring on the shock? Or, a link on where to order / what type of spring it is? My suspension guy was going to order one for me and the spring shop says they don't have measurements for the '13 690 rear?
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Old 06-11-2013, 01:51 PM   #10
bruceca2002 OP
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I weigh 260 lbs in my birthday suit. With all my gear, backpack and a extra 15 pounds of weight from my RR tanks, I am probably close to 300 pounds.

The bike came with a 8.0 n/mm rear spring. I then tried a 10.0 from Super Plush that seemed to make no noticeable difference. I have now installed a 13.0 spring from my Super Enduro and I get proper sag numbers with 10 mm of spring pre-load. I will try this out this weekend. The KTM manual calls for 18mm of spring pre-load which seems to be excessive IMHO.

The front forks seem to have a closer spring rate but also have very stiff valving resulting in a very harsh action.

Maybe a suspension tuner will offer some info as what is wrong with the valving on this bike!!!
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Old 06-11-2013, 03:46 PM   #11
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How complicated/involved is it to convert the 2012+ rear shock to full 300mm travel?
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Old 06-11-2013, 04:08 PM   #12
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Quote:
Originally Posted by Yellow Pig View Post
How complicated/involved is it to convert the 2012+ rear shock to full 300mm travel?

send it to BOB BELL at Precision Concepts
or buy the NEW shock from Rally Raid UK
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Old 06-11-2013, 04:23 PM   #13
DuctTape
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I have and used the shimstacker software to re-valve (Gold) my 990 and the 690 is next. If anyone knows the stock shim stack I could put the shims in the software and then upload what it shows and also play around with differnt stacks, oil weight, etc.

The following pic shows 3 different stacks with the dark dotted line being the soft stock stack the 990 comes stock with. The yellow line is the updated stack.
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Old 06-11-2013, 04:41 PM   #14
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Put me on the list for the fork kit!
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Old 06-11-2013, 04:57 PM   #15
gen
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Quote:
Originally Posted by brianpc View Post
Anybody have measurements for the heavier rear spring on the shock? Or, a link on where to order / what type of spring it is?
Race Tech has a calculator but they only have the 2008 Enduro data.

http://racetech.com/ProductSearch/1/...%20Enduro/2008

I'd speak to James at Super Plush Suspension as he is focused on the KTM suspension market.

http://www.superplushsuspension.com/
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