HELP: High Speed Wobble, Possible Supension Adjustment?

Tiago Garcia
125cc
125cc
Posts: 24
Joined: Tue Nov 29, 2016 1:47 pm
Country: Qatar
City: Doha
Year: 2014

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

Post by Tiago Garcia » Sun Dec 11, 2016 7:12 pm

JDS1290SDr wrote:...I do have another solution for this problem. DONT drive that fricken fast :)
https://www.youtube.com/watch?v=Y3nyrAOQ1pU ....
WTF!!!! Crazy fu%$## she%"#!!

Tiago Garcia
125cc
125cc
Posts: 24
Joined: Tue Nov 29, 2016 1:47 pm
Country: Qatar
City: Doha
Year: 2014

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

Post by Tiago Garcia » Wed Dec 14, 2016 2:58 pm

I check my SAG today according the MC Garage on YouTube (https://www.youtube.com/watch?v=ZtzTyCKh5fY ).

Here is the results:
Front
(L1) Unload: 135mm
(L2) Load low: 950mm
(L3) Load high: 100mm
135-((95+100)÷2= 37.5mm

Rear
(L1) Unload: 650mm
(L2) Load low: 620mm
(L3) Load high: 620mm
650-((620+620)÷2= 30mm

So, i have a SAG 37.5mm in front and 30mm on rear. What these numbers mean? lol

Thanks again!

User avatar
NiteKreeper
900cc
900cc
Posts: 307
Joined: Fri Oct 07, 2016 5:41 am
Country: Australia
City: Sydney
Year: 2016

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

Post by NiteKreeper » Wed Dec 14, 2016 9:22 pm

According to the video you linked, your sag figures are within acceptable limits - this doesn't mean everything is perfect, but it means that you have a decent base to start setting the other parameters.

The L2 and L3 figures being the same on the rear though, might mean you have an issue there - again according to your own video, these shouldn't be the same because of the valves and seals in the suspension...

Tiago Garcia
125cc
125cc
Posts: 24
Joined: Tue Nov 29, 2016 1:47 pm
Country: Qatar
City: Doha
Year: 2014

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

Post by Tiago Garcia » Wed Dec 14, 2016 10:14 pm

Thanks Nite! I will check those valves and seals in the near future. But for what i understand, my SAG its not a problem for this wobble problem. And my settings are all in Sport mode (excluding the rear preload, its with 14 threads). Im giving the tires a possible fault here. At the moment im running them with 36psi on both. Any ideias or tips?

User avatar
NiteKreeper
900cc
900cc
Posts: 307
Joined: Fri Oct 07, 2016 5:41 am
Country: Australia
City: Sydney
Year: 2016

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

Post by NiteKreeper » Wed Dec 14, 2016 10:33 pm

Didn't you just have the rear shock overhauled?

Tiago Garcia
125cc
125cc
Posts: 24
Joined: Tue Nov 29, 2016 1:47 pm
Country: Qatar
City: Doha
Year: 2014

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

Post by Tiago Garcia » Wed Dec 14, 2016 11:40 pm

NiteKreeper wrote:Didn't you just have the rear shock overhauled?
No. Last time the dealer only put the preload spring with 14 visible threads. Never inspect the shock. At least thats what i know...

Meanwhile, just went to ride the bike again. Mess a little bit with the forks and get a new best values with the front compression at 4 clicks out and front rebound with 4 clicks out also.
Tomorow i will try new settings for the rear. Can anyone explain to me what is the diference between the Compression low and high on the rear shock?

Thanks again!

JDS1290SDr
675cc
675cc
Posts: 210
Joined: Mon Aug 22, 2016 9:20 am
Country: Canada
City: Edmonton
Year: 2015
Colour: Black

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

Post by JDS1290SDr » Thu Dec 15, 2016 1:12 am

As Nite said. Your sag #s are good. Your rebound on your front forks at 4 out from fully closed is asking for trouble. That setting(if your valves are working & your fork oil isn't thinned out) will prevent your forks from making contact with the road under hard acceleration & will pack your forks(not let them spring back) under a series of fast bumps.
The high speed low speed settings on the rear shock arnt really relevant IMO.
At what speeds are you feeling these wobbles at.
Does yours do this? Ive had a few of those but never went down. (on other older bikes. 1972 H2 kawi, 1974 900 Kawi & a 2006 636 Kawi to be exact)
https://www.youtube.com/watch?v=TpeNWxHF6uI
Dave explains causes.
https://www.youtube.com/watch?v=LmHU-gtlOKo
Last edited by JDS1290SDr on Thu Dec 15, 2016 5:43 am, edited 1 time in total.
PRESENT STABLE
2015 Black SDR
2010 450 SXF
2010 450 XC-W Six days
2010 Ducati Multistrada
2010 Victory Cross Country
PAST
Way to many to mention

Tiago Garcia
125cc
125cc
Posts: 24
Joined: Tue Nov 29, 2016 1:47 pm
Country: Qatar
City: Doha
Year: 2014

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

Post by Tiago Garcia » Thu Dec 15, 2016 1:31 am

JDS1290SDr wrote:
At what speeds are you feeling these wobbles at.
High speed allways, more than 160kmh. With these settings now its more prone to happening at 200kmh and up. Its more when pushing the gears in high speed.
The wobble kind is more like this old vídeo at minute 3.24 :
https://www.youtube.com/watch?v=z3OQTU-kE2s

tinath2016
125cc
125cc
Posts: 15
Joined: Thu Dec 15, 2016 4:43 am
Country: canada
City: GR
Year: 2016

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

Post by tinath2016 » Thu Dec 15, 2016 5:12 am

hey guys!

new to the forum and new to SDR also :) just to shared my things... i have the same problem on my 2016 SDR but it never got near a tank slapper. Just some waving on the handler bar. It happens when accelerating hard above 130 kmh. You guys spoke about sag and suspension setup and i think i really need to get mine settled since im only 5.3 feet tall and 125 pounds so everything may be out of specification... bike only have 3500 kilometers on the meter ...

thx much !
2016 KTM super duke R
2010 kawasaki zx6r
1998 honda cbr 900 rr

JDS1290SDr
675cc
675cc
Posts: 210
Joined: Mon Aug 22, 2016 9:20 am
Country: Canada
City: Edmonton
Year: 2015
Colour: Black

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

Post by JDS1290SDr » Thu Dec 15, 2016 6:01 am

lol. I give up. There doesn't seem to be a magic setting on these bikes that will work for every one.
Tinath. I will assume your not riding again until spring. Being that your in Canada,,, eh? :)

Tiago. Your just going to have to experiment. Lower the front forks, raise the front forks. Better tires? I don't know. I am envious that your still riding & Im sitting out it the middle of Timbuktoo relieving some of the boredom of work by trying to help fellow riders.
Keep us posted.

Nite. Did U ever count your threads above your plastic pre-load adjuster on your rear shock? If so what are they, how much do U weigh?
PRESENT STABLE
2015 Black SDR
2010 450 SXF
2010 450 XC-W Six days
2010 Ducati Multistrada
2010 Victory Cross Country
PAST
Way to many to mention

User avatar
NiteKreeper
900cc
900cc
Posts: 307
Joined: Fri Oct 07, 2016 5:41 am
Country: Australia
City: Sydney
Year: 2016

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

Post by NiteKreeper » Thu Dec 15, 2016 9:20 am

JDS1290SDr wrote:Nite. Did U ever count your threads above your plastic pre-load adjuster on your rear shock? If so what are they, how much do U weigh?
I just checked now and I'm showing 9 threads.
And the bathroom scale says I'm 80.5Kg, but it's a dirty liar. Probably closer to 90Kg in all my gear...

tinath2016
125cc
125cc
Posts: 15
Joined: Thu Dec 15, 2016 4:43 am
Country: canada
City: GR
Year: 2016

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

Post by tinath2016 » Fri Dec 16, 2016 1:45 am

Yeah your right already have lot of snow here! Haha ... bad thing where i live is my dealer is located 6 hrs from me and its a long trip... ill ask him if he can setup de bike properly for my weight when i go for my next service. Thats probably why my last bike was a kawasaki dealer was 10 min instead of 6 hrs :D

Very happy with the bike so far. I was a bit worried about vtwins and their sound... now im smiling everytime it starts :D

For suspension setup i think i really need a setup since when i sit on it it doesnt move down at all so the sag may be incorrect... whats the factory rider weight the bike is settled ?

Thx !
2016 KTM super duke R
2010 kawasaki zx6r
1998 honda cbr 900 rr

JDS1290SDr
675cc
675cc
Posts: 210
Joined: Mon Aug 22, 2016 9:20 am
Country: Canada
City: Edmonton
Year: 2015
Colour: Black

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

Post by JDS1290SDr » Fri Dec 16, 2016 8:03 am

^^ I hate to say it but. Do the settings yourself. Unless you have lots of money to throw around? (& if you do will you be my buddy? :) ).
Your dealer is going to get some kid they pay $20 a hr to adjust your pre-load then charge you $100 a hr.
Now having said that. Your bike with your weight may require different springs. That's a little more complex.
Where the frick are you located. FT Mac or High Level?
PRESENT STABLE
2015 Black SDR
2010 450 SXF
2010 450 XC-W Six days
2010 Ducati Multistrada
2010 Victory Cross Country
PAST
Way to many to mention

tinath2016
125cc
125cc
Posts: 15
Joined: Thu Dec 15, 2016 4:43 am
Country: canada
City: GR
Year: 2016

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

Post by tinath2016 » Fri Dec 16, 2016 9:02 am

quebec/gaspesie... different springs !! damn :cry: thats pretty bad haha where do i need to start first on the settings then ?

thx!
2016 KTM super duke R
2010 kawasaki zx6r
1998 honda cbr 900 rr

JDS1290SDr
675cc
675cc
Posts: 210
Joined: Mon Aug 22, 2016 9:20 am
Country: Canada
City: Edmonton
Year: 2015
Colour: Black

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

Post by JDS1290SDr » Fri Dec 16, 2016 10:38 am

^ for some reason I thought you were in Alberta. Dam night shift is getting to me.
You cant do anything with the front forks other then change the compression & rebound dampening. But U can change the pre-load on your rear shock.
I have 14 threads showing on my rear shock above the plastic adjuster collet/nut. I am ruffly 200 lbs.
More threads showing above the adjuster collet means more pre-load.
I don't know what my sag is on the rear. My bike was bought used from a heavier rider. It seemed to handle well on high speeds B4 I stored it.
I believe the stock setting is 9 threads showing. Read some of these previous posts.
Nitekreeper is ruffly my weight & he has stock setting preload & his bike don't wobble at high speeds.
https://www.youtube.com/watch?v=ZtzTyCKh5fY
If U cant get the proper sag by loosening off the rear spring collet/nut U may need a lighter spring.
Did your bike always wobble, even when new with new tires?
PRESENT STABLE
2015 Black SDR
2010 450 SXF
2010 450 XC-W Six days
2010 Ducati Multistrada
2010 Victory Cross Country
PAST
Way to many to mention

tinath2016
125cc
125cc
Posts: 15
Joined: Thu Dec 15, 2016 4:43 am
Country: canada
City: GR
Year: 2016

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

Post by tinath2016 » Sun Dec 18, 2016 12:14 am

Well i did not test it a lot but it did wobble like 4-5 time depending on how hard i turn the throttle never tried without tc abs off tho. For the tires they were almost new ... they have 2500 kilo now and i can sense a flat spot with my hand in the middle

Thx
2016 KTM super duke R
2010 kawasaki zx6r
1998 honda cbr 900 rr

Tiago Garcia
125cc
125cc
Posts: 24
Joined: Tue Nov 29, 2016 1:47 pm
Country: Qatar
City: Doha
Year: 2014

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

Post by Tiago Garcia » Sun Dec 18, 2016 12:30 am

Tinath... try to soft the rear low compression and stiff a little the rear rebound. Post here the results.
I feel much better with my settings, but still looking to get perfection in high speeds.
Maybe they dont fit you, but can help you to try to figure out:

Forks
Comp: 5 clicks out
Rebo: 7 clicks out

Shock
Preload: 14 threads showing (here maybe you dont need as much)
Low Comp: 11 clicks out
High Comp: 1 turn
Rebo: 8
Both tires with 36psi or 2,5 bar.

Try these and tell me if you feel the bike better under hard speed throttle. From there you can make your settings.
Give feedback... and thanks!

JDS1290SDr
675cc
675cc
Posts: 210
Joined: Mon Aug 22, 2016 9:20 am
Country: Canada
City: Edmonton
Year: 2015
Colour: Black

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

Post by JDS1290SDr » Sun Dec 18, 2016 4:33 am

U will be waiting until April for results im sure. Its winter here in Canada.
PRESENT STABLE
2015 Black SDR
2010 450 SXF
2010 450 XC-W Six days
2010 Ducati Multistrada
2010 Victory Cross Country
PAST
Way to many to mention

Tiago Garcia
125cc
125cc
Posts: 24
Joined: Tue Nov 29, 2016 1:47 pm
Country: Qatar
City: Doha
Year: 2014

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

Post by Tiago Garcia » Sun Dec 18, 2016 5:52 pm

JDS1290SDr wrote:U will be waiting until April for results im sure. Its winter here in Canada.
I have time, still driving until there, lol. :lol:

tinath2016
125cc
125cc
Posts: 15
Joined: Thu Dec 15, 2016 4:43 am
Country: canada
City: GR
Year: 2016

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

Post by tinath2016 » Mon Dec 19, 2016 2:06 pm

Yeah right, not before june here still have a lot of snow in april :( but ill be sure to work on it as soon as i can get the bike outside for a sprin :) and post results.... all i can do now is open the garage and just look at it :)

Thx
2016 KTM super duke R
2010 kawasaki zx6r
1998 honda cbr 900 rr

Post Reply