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Old 05-08-2013, 12:48 PM   #39
PowerCell OP
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Joined: Sep 2005
Location: Southern Kalifornia
Oddometer: 2,412
Originally Posted by SpeedyR View Post
lastly, I've seen the 320mm suspension that someone offers for the 9x0 bikes, what is the travel on the 950 stock vs what we might be looking at with the Ohlins?

I'm assuming it's the fork internals and a replacement rear shock? A lot of my friends are running the ohlins internals in their road race bikes and are very happy with them.

You know, I've seen several people refer to 320mm front suspension. Originally Pyndon, and more recently Alex at Konflict. I'm not sure if they're transposing numbers or what, but the stock KTM EXC/SX forks run 300mm/302mm respectively. WP stuff is already a little edgy when it comes to overlap between the fork housing and the stanchion tubes (Íhlins complete forks run 24mm extra), so I can't recomend or even imagine pushing them another 20mm. The big bikes place a crap load of force on the fork slider bushings. To decrease that overlap even a small amount can cause the fork bushings to wear quickly and the forks will start to flex and become unstable.

Maybe the confusion is they're really only referring to the shock. I haven't spoken to either about it. You can extend the length and travel of the shock, but this will unfavorably upset the frame geometry. You could try and compromise by running a dual-stage rear spring so that any added travel is only realized as droop, but that's not going to benefit you as much as you might hope as it causes the shock to pump. The true solution out back would require a shock relocation and modding both the under seat tray and the subframe.

Another issue with the forks is the bottom triple-clamp. It rides approximately 25mm lower than a KTM thumper. You just don't have the room available for this kind of travel without building all new fork housings and stanchion tubes from scratch (~$10k). If I were to attempt this I would definately upgrade to a 52mm fork tube and increase the overlap. Unfortunately, this would raise the seat height by another couple of inches!

I believe shorty Adventure forks are 235mm, SER forks are listed at 250mm (resticted due to the aweful rear shock), and S forks are around 265mm. I run the max physically available without unbalancing the geometry... 277mm. Any more than that to me requires a frame redesign...

~ Ken

PowerCell screwed with this post 05-08-2013 at 12:54 PM
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