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Discussion Starter #1
I've got about 1,000 miles on my 2015 and thinking the springs should be run in by now. Tried to set my sag and the front is adjusted all the way out and I'm measuring 8mm using the method in the manual. The manual is calling for 10-15mm. I'm thinking i need lighter for springs. Can someone point me in the right direction? I want to make sure I get the correct spring. Has anyone changed these out? Is this something I should have done or can a reasonably well mechanically inclined person install them? Also I'm wondering if I could get away with just replacing the spring in the right leg? Seems reasonable and would be 1/2 the cost and effort.
 

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My wife had Jim at Catalyst Reaction make a few adjustments to her settings last weekend at Sonoma Raceway and he also ordered a rear spring for her. He is very familiar with the DDC and should know just what you need if you give him a call.
Catalyst Reaction Tuning - Motorcycle Tuning
 

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Discussion Starter #7
Ok, I never heard back from catalyst so now I'm on to EPM.

Another thought I had, does anyone know if there are preload shims that I could just switch out or remove? I am 185lbs with gear so according to the manual it should be sprung correctly.
 

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Discussion Starter #9
What do you guys think about having different springs per side for the forks? Because the DDC only affects 1 side, and the preload adjuster is only on 1 side, it seems the forks won't be balanced anyway. One of the suspension persons I'm talking to is telling me they must be the same.
 

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I am waiting to hear from a UK suspension specialist, they have a 2015 in there now and hope to have some recommendations later this week.

They are saying that there is a preload spacer in the right fork leg than can be changed.

I will let you know what I hear, I currently have F & R preload backed right off to achieve the required sag, I weigh 90Kg.

At the moment I am experimenting with damper settings, currently trying -4 COM both front & rear (with the 2D sensor in the front) this is in Sport mode for road riding.

Track is different as the Slick and user modes have different base settings.

Mark.
 

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There is a reason that the stock spring is so stiff, I don't know what it is, but it's so far off the scale I can assure you there's a reason.

My hunch, and again hunch, is that the DDC needs a lot of support to keep the fork/shock up high in the stroke because of the special mechanism they use to control damping, which is light years ahead of everyone else, but also very different.
 

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Discussion Starter #12
I am waiting to hear from a UK suspension specialist, they have a 2015 in there now and hope to have some recommendations later this week.

They are saying that there is a preload spacer in the right fork leg than can be changed.

I will let you know what I hear, I currently have F & R preload backed right off to achieve the required sag, I weigh 90Kg.

At the moment I am experimenting with damper settings, currently trying -4 COM both front & rear (with the 2D sensor in the front) this is in Sport mode for road riding.

Track is different as the Slick and user modes have different base settings.

Mark.
Thanks Mark, finally some solid info. Looking forward to hearing back.

As far as the DDC needing stiffer springs, that may be so but if I cant get the correct amount of sag then either the springs or the preload is off. The bike does not feel too stiff when riding it at all. Feels quite good actually, I just think the front feels a bit tall which is consistent with the lack of sag I'm measuring.
 

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Discussion Starter #13
There is a reason that the stock spring is so stiff, I don't know what it is, but it's so far off the scale I can assure you there's a reason.

My hunch, and again hunch, is that the DDC needs a lot of support to keep the fork/shock up high in the stroke because of the special mechanism they use to control damping, which is light years ahead of everyone else, but also very different.
Do you know for certain what the 2015 stock springs are?

My understanding is that there is really nothing special about the valves other than the fact that they can be electronically adjusted. In other words if the ecu was telling them to remain static for damping, they should feel and operate exactly like a conventional damped fork or shock. This is not based on solid info so please chime in if this is not correct.
 

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What do you guys think about having different springs per side for the forks? Because the DDC only affects 1 side, and the preload adjuster is only on 1 side, it seems the forks won't be balanced anyway. One of the suspension persons I'm talking to is telling me they must be the same.
Well, in the left tube of the DDC fork there is another spring: in the HP4/15RR it's a 9.5N/mm spring where the right is 9.5 (HP4) or 11 (15RR).

Also you can have for sure different springs even in a conventional fork since Öhlins forks series 200 having compression in one tube and rebound in the other since they are connected buy the triple clamps.

You can have a 10N/mm left and a 9.5N/mm right so you get overall spring rate of 9.75N/mm...quite normal.
 

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Discussion Starter #16
Well, in the left tube of the DDC fork there is another spring: in the HP4/15RR it's a 9.5N/mm spring where the right is 9.5 (HP4) or 11 (15RR).

Also you can have for sure different springs even in a conventional fork since Öhlins forks series 200 having compression in one tube and rebound in the other since they are connected buy the triple clamps.

You can have a 10N/mm left and a 9.5N/mm right so you get overall spring rate of 9.75N/mm...quite normal.
So the hp4 is 9.5 / 9.5
2015 DDC is 9.5 / 11

Is this correct for left/right?
 

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Discussion Starter #19
Nothing. I decided to just give it a rest for a while until more becomes known about the new bike.
 

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Jim helped me

My wife had Jim at Catalyst Reaction make a few adjustments to her settings last weekend at Sonoma Raceway and he also ordered a rear spring for her. He is very familiar with the DDC and should know just what you need if you give him a call.
Catalyst Reaction Tuning - Motorcycle Tuning
Jim is who helped me determine the PROPER spring rates I needed for my DDC. when I contacted Wilburs they were giving me bad information about what spring rates were already on my 14 HP4.

Jim had the correct info, and based upon my weight & race pace he got me the rear spring I needed, and gave the the proper spring rates to order from Klaus at EPM for the forks.

Cannot say enough good things about Jim at Catalyst.
 
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