Preload Adjuster Error / Problems with Mizu lowering kit 1290SDGT

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Loski
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Preload Adjuster Error / Problems with Mizu lowering kit 1290SDGT

Post by Loski » Thu May 28, 2020 4:19 pm

Im beyond frustrated and hope someone knows what’s going on. I’ve lowered my SDGT with a Mizu Lowering kit which is essentially a machined washer or collar that allows the spring to sit 25mm lower around the rear shock.
I’ve been back and forth to the dealer more times than I care to remember because it feels like the bike is almost unridable on anything other than a perfect surface. I live in the California Bay Area and our roads are anything but. It’s almost as bouncy or pogo-ish as when i first bought the bike (prior to suspension update). I’ve tried every suspension combo the bike will allow with no success. On my most recent trip to the dealer, I figured out that -5 was the maximum preload setting you can set for the rear and had the tech set the rear preload to -5 which is the stiffest setting and highest preload setting you can get out of the rear which temporarily worked and the suspension and ride quality was about 95% good. At least good enough, so that I was willing to ride it for a while and put it through its paces to explore its limits.

When I woke up the next morning to give it a good shakedown before work, I removed my panniers and top case and adjusted the “Load” to “solo rider + no luggage” and felt the bike adjust accordingly and saw/felt the preload softening and lowering the bike a few mm’s so i got on and started riding. A minute into the ride, I got the dreaded Preload Adjuster error message but the “Preload Adjuster” warning keeps flashing and is stuck in one mode (i believe it’s rider+ no luggage) and will not adjust anymore. This is strange because I was able to ride from the dealership to work and then home, the day before. I was commuting from work so I was loaded out with computer, Shoes, work clothes, canteens of water, etc but only on freeway/highway miles.

I’ve condensed this long and frustrating journey but I’ve been to the dealer more times than I care to remember trying to sort out my suspension. I’m frustrated enough to think that going back to the stock OEM height is acceptable but I’m starting to wonder if there is something else going on here that’s not allowing the bike to adjust to different “Load” settings ie- solo rider/ solo rider + luggage/ two up / two up + luggage?

After the software suspension update the bike road gloriously. This is a new to me, 2016 SDGT i recently purchased after going down on my SDR last year and trying to find a more “sensible bike” I went to a 1250 GS Adventure “low frame” and Gen 2 Ducati Super Sport S which we’re both excellent bikes in their own right, but either too smooth and refined (gsa) or too aggressive of a riding position for longer periods and rides (ducati super sport). I like to ride spirited but also wanted something comfortable enough for 1-2 hours in the saddle without my back aching. I commute 100-120 miles loaded with luggage to and from work so I wanted features like a windscreen, hard cases and cruise control but wanted something fun above all else. I am on the short side at 5’3” with a 26” inseam 180 lbs. The SDGT is a little tall and ticks all those boxes for me. Unfortunately I only able to use 1 big toe to touch the ground and balance on. I’ve been riding street for 20+ years so i can manage but was really hoping to get a little more of my foot down for stability and less leg cramping at stops because i would prefer to be focusing on what’s round and behind me vs. potholes, street depressions and sloping grades, gravel etc.

I was hesitant to install the Mizu Lowering kit after the suspension update because it was so good (which is essentially a machined washer or collar that allows the spring to sit lower around the shock shroud) and went against my better judgement and listened to the local KTM Tech Advisor because he seemed confident the electronic suspension would be able to figure it all out, so I had them install the lowering kit and raised the fork tubes in the triple trees to keep everything relative.

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GaryCulb
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Re: Preload Adjuster Error / Problems with Mizu lowering kit 1290SDGT

Post by GaryCulb » Fri May 29, 2020 3:23 pm

Loski,
It appears you have two questions? The first is can you lower the KTM SDGT. The answer is NO. I too am vertically challenged & took my bike to a superbike shop. They stated that the way the KTM SDGT is set up it should not be lowered without the result having a dramatic effect on handling of the bike. The second question appears to be what can be done to assist the vertically challenged? Corbin Low seat (https://www.corbin.com/ktm/ktmsd1290gt.shtml ) & thick heal sole combinations (i.e Daytona M-Star GTX Boots: https://www.revzilla.com/motorcycle/day ... -gtx-boots ). Best,

Doc :D :D

Image

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Re: Preload Adjuster Error / Problems with Mizu lowering kit 1290SDGT

Post by Aussie Dave » Sat May 30, 2020 11:08 pm

Cheers all......

And yet it has been done successfully ....... lowering a 19SDGT that is ........ see copy of post from 'accessories' thread last year (below).... The wording is important, suggesting it is not a straightforward operation to do it properly.

Loski and Steve Gnome are the only two I've read about that have lowered their Gt's..... maybe there are others that can add their experience.....




Re: Lowering Kit 25mm for SDGT
$
Post by Steve-Gnome » Fri Mar 15, 2019 6:18 pm

I have just had min lowered today by Hoeys - (Local Adelaide bike suspension specialist). its around 28mm lower which is about the max you can get. This is as far as the forks can be dropped in the yokes as they start to taper after this and you couldn't clamp them.

It involved a collar on the shock and then machining a new spring mount spacer that restores the original spring compression.

Riding it - you cant really tell the difference. The semi active stuff still all works as advertised but is is SO much easier now I can flat foot it!!
IMG_2989.jpg
can't really see the difference without another right beside it.
Top
2017 1290GT 27,484km, 05 CBR1100XX 130k kms

Prev loves...Capo1200TP-014, CBR11xx-002, 2xFZR1000genisis-94, FJ1200-89, FJ1100-84, XS1100P, VF1000F-83, CX500, VF750S, KZ1000J1-81, KZ1000ST-79, CB750F2-77, CB360T-74, CB175.. started it all in 1974 ;)

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Re: Preload Adjuster Error / Problems with Mizu lowering kit 1290SDGT

Post by pk1 » Sun May 31, 2020 2:34 pm

I believe adjusting the suspension settings while on the move can cause this fault. It should only be adjusted while stationary will need dealer reset.

Loski
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Re: Preload Adjuster Error / Problems with Mizu lowering kit 1290SDGT

Post by Loski » Sun May 31, 2020 3:52 pm

GaryCulb wrote:
Fri May 29, 2020 3:23 pm
Loski,
It appears you have two questions? The first is can you lower the KTM SDGT. The answer is NO. I too am vertically challenged & took my bike to a superbike shop. They stated that the way the KTM SDGT is set up it should not be lowered without the result having a dramatic effect on handling of the bike. The second question appears to be what can be done to assist the vertically challenged? Corbin Low seat (https://www.corbin.com/ktm/ktmsd1290gt.shtml ) & thick heal sole combinations (i.e Daytona M-Star GTX Boots: https://www.revzilla.com/motorcycle/day ... -gtx-boots ). Best,

Doc :D :D

Image
Sorry for the delayed response. Been busy this weekend. Thanks for the recommendations Doc! Looking good 👍

I guess if I were to simplify and breakdown my questions, it would be this:

Is there a way for the computer understand that the bike has been lowered, the travel or stroke has been shortened and adjust its the parameters for damping? Yes the bike can technically be lowered. But can it be done without sacrificing the ride quality and handling characteristics? Answer: not likely unless someone with KTM programming skills can adjust the algorithms or parameters in the system.

I was temporarily successful by having the tech adjust the preload in the rear to a -5 setting which the stiffest setting and increases the preload, but once I switched from rider+luggage into solo rider + no luggage, i felt the rear of the bike soften and drop slightly, which is what it’s supposed to do. Then the preload adjuster error message started to flash. Trying to undo this, i attempted to change the load setting back to rider + luggage with no luck. I continued to ride and the ride was rubbish again, bouncing and bucking like a “demented pogo stick” again, as another Facebook Super Duke GT Forum member had put it, and I could not adjust to any other load setting.

Unfortunately I’ve looked into the Daytona boots as soon as they came to market but appears like most of the height advantage is in the heel of the boot rather than in the toe or ball of the foot, which is the only area that’s even close to touching the ground for me.

Thank you again for the suggestions Doc. I think I’ve quietly and internally accepted my short comings, no pun intended and will just have to accept that it’s going to have to go back to OEM height.

Loski
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Re: Preload Adjuster Error / Problems with Mizu lowering kit 1290SDGT

Post by Loski » Sun May 31, 2020 10:37 pm

Aussie Dave wrote:
Sat May 30, 2020 11:08 pm
Cheers all......

And yet it has been done successfully ....... lowering a 19SDGT that is ........ see copy of post from 'accessories' thread last year (below).... The wording is important, suggesting it is not a straightforward operation to do it properly.

Loski and Steve Gnome are the only two I've read about that have lowered their Gt's..... maybe there are others that can add their experience.....




Re: Lowering Kit 25mm for SDGT
$
Post by Steve-Gnome » Fri Mar 15, 2019 6:18 pm

I have just had min lowered today by Hoeys - (Local Adelaide bike suspension specialist). its around 28mm lower which is about the max you can get. This is as far as the forks can be dropped in the yokes as they start to taper after this and you couldn't clamp them.

It involved a collar on the shock and then machining a new spring mount spacer that restores the original spring compression.

Riding it - you cant really tell the difference. The semi active stuff still all works as advertised but is is SO much easier now I can flat foot it!!
IMG_2989.jpg
can't really see the difference without another right beside it.
Top
Thanks Dave! I believe it can be done successfully, but for me, I have to ask myself: at what cost, time and frustrations and marginal gains? Without knowing the missing piece of the equation (the thickness of the spring spacer mount) that Steve Gnome mentioned in his post, I have to imagine the spacer must be between 3-5mm thick (at a minimum) to restore the spring rate and the Mizu lowering kit only lowers the bike by approx 20mm on our GT, so we're talking about lowering the bike by approx 15mm-17mm maximum, which to me, is personally not enough to continue to go through these frustrations, constant visits to the dealer to clear my error codes and lost riding time.

My only hope is that my journey helps other current and future forum members find a solution that works for them or give them the courage to try and pick up where I left off.

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