HELP: High Speed Wobble, Possible Supension Adjustment?

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Re: HELP: High Speed Wobble, Possible Supension Adjustment?

Post by Silent singer » Mon Apr 25, 2016 5:59 am

wsmc99 wrote:Yep, sounds like it's in the right range now.
I have no stability issues whatsoever at any speed.
funny thing that my girlfriend said she had some shake at higher speeds and I asked her where she was sitting on her bike. Way to the back. Told her to move forward when it happened again, it went away. Time for some more rear preload for her!
you also can play with lightening the rebound which can help a bit if the shock packs down.
Can't wait to give it a proper test on the track. It was too cold and wet yesterday. Next opportunity is the 9th May. it's interesting that your forks are set at 8mm, mine was 7.5mm and yet I had wobble and you didn't. Can't figure that out if we had similar sag and rear compression numbers. Maybe the tyre really was a factor. Are you running the stock steering damper?
Not complaining now though, if she rides past 140mph completely stable then I'm happy.

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Re: HELP: High Speed Wobble, Possible Supension Adjustment?

Post by wsmc99 » Mon Apr 25, 2016 3:01 pm

Tire could be an issue, I'm running the stock set though the rear is about cooked.
I also have a stiffer rear spring so while you may get the "right" sag, you could be riding lower in the shock stroke. I could with the stock spring get the correct sag, but knew it was too low in the stroke because it was harsh and would bottom a little.
If the rear is to soft it will allow the front to wag and not keep weight on it.
The other test for this is if the front wants to run wide or has trouble finishing turns on the throttle.

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Re: HELP: High Speed Wobble, Possible Supension Adjustment?

Post by Silent singer » Mon Apr 25, 2016 3:09 pm

Forgot you changed the rear spring. I'll check the static sag out of curiosity. It does feel light at the front but I just put it down to the upright riding position.

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Re: HELP: High Speed Wobble, Possible Supension Adjustment?

Post by Hitman » Wed May 25, 2016 12:22 pm

At 100kg I have had the suspension set firm - no issues so far even with tank and rear bags fitted- dampener does its job.
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Re: HELP: High Speed Wobble, Possible Supension Adjustment?

Post by Tiago Garcia » Tue Nov 29, 2016 1:59 pm

Hi guys!

Im also having problems with SD 1290r suspension. Im having with 170kmh and up. Put all the suspension in sport mode and the problems continue. Lower the front rebound to 11 clicks and gets a little better, but far from good. Recently i made a 2100km trip with the bike and 2 Kriega US-20 (around 30kg) on the passenger seat and the bike it was amazing! I reach 300kmh with the SD several times pushing with a 2014 RSV4 side to side and not a single wobble! After i take out the bags, the problems start again.
Can you guys help me with this?
Thanks!

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Re: HELP: High Speed Wobble, Possible Supension Adjustment?

Post by NiteKreeper » Tue Nov 29, 2016 9:22 pm

Tiago Garcia wrote:...2 Kriega US-20 (around 30kg) on the passenger seat and the bike it was amazing! I reach 300kmh with the SD several times...
I'm dubious about this claim. Got video?

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Re: HELP: High Speed Wobble, Possible Supension Adjustment?

Post by Tiago Garcia » Wed Nov 30, 2016 12:00 am

NiteKreeper wrote:
Tiago Garcia wrote:...2 Kriega US-20 (around 30kg) on the passenger seat and the bike it was amazing! I reach 300kmh with the SD several times...
I'm dubious about this claim. Got video?


lol... no. But can you help me with this suspension problem?
Thanks!

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Re: HELP: High Speed Wobble, Possible Supension Adjustment?

Post by NiteKreeper » Wed Nov 30, 2016 9:51 am

Here's the thing.
At 220Kmh, I'm hooking my feet and actively hanging on.
At 280Kmh, the front is barely down, there's no steering and the thing is actively trying to dismount me.
I've seen the video and I know 305Kmh (actual) is possible, but I just don't believe you joined the 300 Club "several times", with 30Kg of Kriega on the back.

But to answer your question: at none of those speeds have I experienced any wobble, except perhaps from my bowels.

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Re: HELP: High Speed Wobble, Possible Supension Adjustment?

Post by JDS1290SDr » Wed Nov 30, 2016 5:47 pm

^ Good call Nite. 300 kph with 30 kg of luggage is questionable. Now, is there any truth to the rest of it?
Mine has seen 280 ish. That's with out the correction plates. Seemed stable. Not 1098 stable, but stable. No wobbles.
From what I have read & what I have experienced on track is: If you lower the front forks(raise them in the triples) the bike will turn in easier. But it will take away from high speed stability.
I had a 1972 Kawi 750 triple. That bike was unpredictable in the wobble department. Tank slappers occasionally. Sitting position had a affect on this. Further forward seemed to resolve that problem,,, mostly.
Yrs ago I started racing a 2006 Kawi 636. I just put a Ohlins rear shock on the back & a set of Ohlins cartridges in the front. I had lengthened the rear shock 7-10 mm. I cant remember exactly. Then took the little toy out for a rip in front of my house. At WOT in 3rd gear that thing shock me harder my old 750. The front tire was chirping as it slammed back & forth. Lowering the rear shock to the OEM length resolved that issue.

Strange that some ppl are experiencing wobbles on the 1290 SDR. I would suspect tires being the main culprit on Roo's bike. But I would also check where your forks are sitting in the triples, & how much preload is on your rear shock.
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Re: HELP: High Speed Wobble, Possible Supension Adjustment?

Post by Tiago Garcia » Wed Nov 30, 2016 6:11 pm

Ok Nite, you dont believe and i dont going to do nothing to you believe. So lets just take this info to try to resolve this suspension problem and not to get away of the main subject.
With 30kg on the rear seat the bike doesnt wobble at all under hard aceleration, without the 30kg the bike starts to shake the front under hard aceleration after reach 170kmh and up.
Im 80kg and my current settings are:
Front compress 7 clicks
Front rebound 12 clicks
Rear preload original (i think its Standart)
Rear compress High 10 clicks
Rear compress Low 1 turn
Rear rebound 12 clicks

By the way, the bike never reach 300kmh on the cluster(so you are right on your coment), only 299kmh at around 9000rpm, but keeps going until 10500rpm and showing 299 on display so 300 its only a way of speak. My bad here...

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Re: HELP: High Speed Wobble, Possible Supension Adjustment?

Post by Tiago Garcia » Wed Nov 30, 2016 6:40 pm

JDS1290SDr wrote:^ Good call Nite. 300 kph with 30 kg of luggage is questionable. Now, is there any truth to the rest of it?
Why should i lie? I just said 300kmh to clarifie that in any speed and with the 30kg extra the bike wont wobble at all, but yes, it reach 299 and more and several times during the 2100km journey. Its almost highway from Qatar to Oman, crossing Abu Dhabi and Dubai, so why so dificult to believe?
Maybe it was my mystake to pull that number out, i should say "in ANY speed" and not "300kmh".
By the way, its a 2014 SD1290r with full Akrapovic titanium and i bought it in October 2016.
Why she wobbles with my 80kg and not with 110kg? Or there is another way to see it?

Thanks guys!

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Re: HELP: High Speed Wobble, Possible Supension Adjustment?

Post by Tiago Garcia » Wed Nov 30, 2016 6:43 pm

Ohh, i forgot to mention, it have brand new original tires and i never messed with raising or lower the forks...

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Re: HELP: High Speed Wobble, Possible Supension Adjustment?

Post by JDS1290SDr » Wed Nov 30, 2016 10:00 pm

Tiago. Your one crazy MF. I freak out that a moose or deer will jump out while trying to maintain that speed. In your case, maybe a camel ;-). Hitting 10500 in 6th gear must take a good tail wind.
1st off. Your speedo is slightly wrong. At 9000 rpm your bike is probably going about 265 kph. http://www.gearingcommander.com
But that's irrelevant.
So many variables. Its really to bad KTM didn't offer a more adjustable suspension.(being able to lengthen or shorten the rear shock would have been nice. Along with pre-load adjustment on the forks)
Ill assume your bike was bought used? Are you sure the original owner never cranked up the pre-load?
Take a picture of your rear shock & where your forks are sitting in the top triple clamp.
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Re: HELP: High Speed Wobble, Possible Supension Adjustment?

Post by Tiago Garcia » Wed Nov 30, 2016 11:49 pm

Thanks for the info JDS... i will have the pictures you ask for.
Just to mention, during this trip, my friends RSV4 shows his top speed at 280kmh on the cluster menu and we travel almost in equal speeds... just to say i also think the KTM have alot of error on his cluster. But im not lying when i say it shows 299kmh and the revs keep going up to a maximum around 10.500rpm. This i will discuss with my dealer. I will check gearing and maybe a possible software update.
I feel this wobble after i reach 170kmh (more or less) and not only at high speeds.
The rear shock shows 9 clear threads now, but my dealer messed around these days to try to setup the bike for me. It was 10 threads before. On the clamps it shows 2 lines, the second line almost "eated" by the clamp.
And yes, i bought the bike last October in second hand with 7700km and its now with 13500km and since the first day i complain about this suspension issue.
Forgot to say, the tire pressure is 42psi in the rear and 36psi in the front... all cold tires pressure.
Thanks!

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Re: HELP: High Speed Wobble, Possible Supension Adjustment?

Post by JDS1290SDr » Thu Dec 01, 2016 3:59 pm

No pics needed with those precise #s. My rear shock shows 14 threads above the adjustment ring. Front forks are right level with the 2 line mark.
Man, some of you guys run high tire pressures. Im guessing this is what Dunlop recommends? I know im running a lot lower. 29 R, 32 F. I still have the stock tires.
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Re: HELP: High Speed Wobble, Possible Supension Adjustment?

Post by Tiago Garcia » Thu Dec 01, 2016 6:05 pm

Thank you soo much JDS!! I will try those settings soon as possible! Maybe in the next week i will have news.
How about preload, compress and rebound for the both suspension? Just for me to start from there.
By the way, i have the 2.20 software version on the cluster, do you think that something to do with the bad speed reading?
Thanks again, i was loosing the hope on the bike!

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Re: HELP: High Speed Wobble, Possible Supension Adjustment?

Post by JDS1290SDr » Thu Dec 01, 2016 8:06 pm

^ No probs. But don't get set on my set-up. It may work for you, but it may not as well. I weigh 192 lbs or 87 Kgs.
Ideally U should set up your sag. As some members suggested to the OP of this thread. I wonder how Roo or the other members have made out with there wobbly bikes?
My left side fork(compression) is set 6 clicks out(counter clockwise)Right side (rebound) 13 clicks out.
Rear shock - Low speed(flat head screw driver) 13 clicks out. High speed (17 mm nut) 1 full turn out.
Rebound adjustment on bottom of shock. 13 clicks out.
Rear shock pre-load is 14 threads showing above the adjustment ring. I never touched that. My bike was bought used with just over 1000 km. The previous owner was at least 15 kg heavier then me. I know he never touched it. I highly doubt the dealership did.
Most of my riding is in 20C ish temperatures. I keep my tire pressures low so they will heat up faster. I like cornering. Lower pressures may feel a little squirmy, but I think a warmer tire gives me better gription. Im not a fan of these Dunlops. Come spring a new set of Pirelli's or Michelin will go on.
It would be nice if the KTM dealership could just update our software & get our speedos accurate. BUT. I don't think so. Kevxtx on this forum has fabricated correction plates which fixes this issue.
I think this may be his ad. http://www.ebay.com/itm/KTM-1290-Super- ... bu&vxp=mtr

Personally. I still think most of the issues with these 1290's wobbling at high speed is tire related.
Keep us posted with your results. &&& DONT CRASH that baby. Especially at the speed U drive :)
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Re: HELP: High Speed Wobble, Possible Supension Adjustment?

Post by NiteKreeper » Thu Dec 01, 2016 9:34 pm

JDS1290SDr wrote:I know im running a lot lower. 29 R, 32 F. I still have the stock tires.
Whoa, that's fucking LOW!
GSXF runs 36F/38R (unloaded) and up to 36/42 (loaded).
1290, I think, is at 36/40, and only ever has a US20 on the back seat.

A few things about tyres:
- The manufacturer's recommendations for pressure are "safe enough" but geared more towards comfort than feel, because they want you to not have a sore arse next time you're deciding what to buy...
- For the most part, any given tyre will take double the recommended pressure.
- Public road surfaces are not the same as race tracks, obviously, and neither do they stress and heat a tyre as much...

I find that when I'm really on it, there's not much wiggle-room between "you're starting to push the front" and "you've now lost the front"; higher pressure maximises that feel and gives you more time (in milliseconds) to correct...

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Re: HELP: High Speed Wobble, Possible Supension Adjustment?

Post by JDS1290SDr » Thu Dec 01, 2016 10:59 pm

^ I think U solved part of my slight problem with the way my 1290 feels at times. It does feel like im pushing the front on low speed corners. Ive tucked the front end B4 on other bikes. I better increase my pressures with these tires. Next spring.
Im uneducated with these street tires & assume because the tire isn't generating heat it isn't as grippy. When really street tires work well just warm.
Mine still holds a straight line at high speeds. Stable. Why are some of these bikes wobbling? It doesn't sound like its a common issue, yet some do.
Ill assume most ppl with these bikes have enough wrenching ability to check nuts & bolts.
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Re: HELP: High Speed Wobble, Possible Supension Adjustment?

Post by Tiago Garcia » Thu Dec 01, 2016 11:00 pm

JDS1290SDr wrote: It would be nice if the KTM dealership could just update our software & get our speedos accurate. BUT. I don't think so. Kevxtx on this forum has fabricated correction plates which fixes this issue.
I remember on my BMW Nine-T, the dealer have to update the ECU software to correct also the speed on the cluster. The first versions like mine (2014) come with a generous speed pointer.

Thanks for the tips, i just will use your settings to start to build mine. Soon i have news and i will post here to help others.

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