ADVrider

Go Back   ADVrider > Bikes > GSpot > Parallel Universe
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 12-17-2012, 06:45 PM   #1
Baiazid OP
Gnarly Adventurer
 
Baiazid's Avatar
 
Joined: Jul 2009
Location: Sydney
Oddometer: 176
F800GS unstable at higher speeds

Hi,

recently I had 30.000km service and I asked them to replace tires as well.
Service consisted also in changing fork oil.
I have now Haidenau K60.

I went for a trip next day after the service and noticed on highway when I go beyond 110kmph, bike starts to be very unstable. Front fork starts to shake semi-violent (left and right). If I slow to 105 .. all is fine.

Before this I used to go 160kmph with no drama.

What can be?
Baiazid is offline   Reply With Quote
Old 12-17-2012, 06:53 PM   #2
Reaver
Outta Here
 
Joined: Aug 2008
Oddometer: 2,467
Did they balance the tires? If the aignment was off it would track funny but since it's speed related I'd say an out of balance front wheel. Bent rim?
__________________
n00babies should be
Reaver is offline   Reply With Quote
Old 12-17-2012, 07:18 PM   #3
Baiazid OP
Gnarly Adventurer
 
Baiazid's Avatar
 
Joined: Jul 2009
Location: Sydney
Oddometer: 176
Quote:
Originally Posted by Reaver View Post
Did they balance the tires? If the aignment was off it would track funny but since it's speed related I'd say an out of balance front wheel. Bent rim?
Saturday I am going again into the service.

Rim has a small bend (had that for last 2 years) and never affected my stability at any speed.

Tires look balanced (they have extra weight added on one side) but I cannot tell if was done properly.
Baiazid is offline   Reply With Quote
Old 12-17-2012, 08:05 PM   #4
sorebutt
Beastly Adventurer
 
Joined: Jun 2008
Location: Lewiston,ID
Oddometer: 1,628
If it is a tire balance issue it should be an up down type vibration. I'm gguessing front wheel alignment. Loosen the pinch bolts that hold the axle on one side. Then bounce the front end up and down a number of times. Then tighten the pinch bolts and take it for a spin.
sorebutt is offline   Reply With Quote
Old 12-17-2012, 10:32 PM   #5
Gangplank
Advenchaintourer
 
Gangplank's Avatar
 
Joined: Jul 2003
Location: Las Vegas
Oddometer: 2,294
Could be a bad tire. Ive had a few sets of TKC 80's that got the death wobble over 80 mph.

Did they mount it right?
__________________
Ride more, bark less
Gangplank is offline   Reply With Quote
Old 12-17-2012, 10:34 PM   #6
catweasel67
Banned
 
Joined: Aug 2009
Location: Vienna, Austria
Oddometer: 8,104
sounds lke a wheel balance issue to me - maybe a weight fell off?
catweasel67 is offline   Reply With Quote
Old 12-18-2012, 03:42 AM   #7
Angryrican
know nothing all
 
Angryrican's Avatar
 
Joined: Mar 2011
Location: North NJ
Oddometer: 264
It's most likely the tire, there are a few threads about K60's doing this when brand new and it goes away after a few hundred miles of break in
Angryrican is offline   Reply With Quote
Old 12-18-2012, 04:38 AM   #8
Loutre
Cosmopolitan Adv
 
Loutre's Avatar
 
Joined: Nov 2010
Location: Reaver's Shed :o)
Oddometer: 3,282
Quote:
Originally Posted by Angryrican View Post
It's most likely the tire, there are a few threads about K60's doing this when brand new and it goes away after a few hundred miles of break in
<-- What he sais. It'll go away after a couple hundred miles. Gives you another reason to get the bike out there and ride it... It's for safety reasons of course
__________________
Keep the smile on your face!
Quote:
Originally Posted by Reaver View Post
You can be imitated but not replaced. You're such a special blend the recipe is guarded like KFC's 11 herbs and spices.
Quote:
Originally Posted by Reaver View Post


Loutre is offline   Reply With Quote
Old 12-18-2012, 05:25 AM   #9
JRWooden
Beastly Adventurer
 
Joined: Jul 2008
Location: The great state of confusion
Oddometer: 4,146
Quote:
Originally Posted by Angryrican View Post
It's most likely the tire, there are a few threads about K60's doing this when brand new and it goes away after a few hundred miles of break in
A:
Do you know how that works?
What's going on in the first few hundred miles?
JRWooden is offline   Reply With Quote
Old 12-18-2012, 01:27 PM   #10
Angryrican
know nothing all
 
Angryrican's Avatar
 
Joined: Mar 2011
Location: North NJ
Oddometer: 264
Quote:
Originally Posted by JRWooden View Post
A:
Do you know how that works?
What's going on in the first few hundred miles?
I don't, I'm going by the scientific evaluations of the members of this forum

joking aside it's mention quite a few times in this forum in different tire threads, I personally have never had the issue but I'm am super anal about tire pressure setting on and off road and dialing in suspension
Angryrican is offline   Reply With Quote
Old 12-18-2012, 06:41 PM   #11
JRWooden
Beastly Adventurer
 
Joined: Jul 2008
Location: The great state of confusion
Oddometer: 4,146
Quote:
Originally Posted by Angryrican View Post
... I'm going by the scientific evaluations of the members of this forum
Yeah ... good luck with that ........
JRWooden is offline   Reply With Quote
Old 12-21-2012, 01:19 PM   #12
Baiazid OP
Gnarly Adventurer
 
Baiazid's Avatar
 
Joined: Jul 2009
Location: Sydney
Oddometer: 176
Problem is that using pireli scorpion I could do 130-150kmph with no indication of trouble and now with k60 I am limited to legal speed (ironic isn't it?)
Baiazid is offline   Reply With Quote
Old 12-21-2012, 02:09 PM   #13
runnin4melife
Studly Adventurer
 
Joined: Mar 2012
Location: Maryland (I hate DC traffic)
Oddometer: 803
Nice smooth high speed tires do not create very much suspension chatter. Even a K60 produces a lot of up/down because it isn't completely even steven. For me I tend to work on front end resolution for front end problems and rear for the rear. If you do not have an adjustable front by all means play with what you got. I dropped my front forks 7mm and adjusted my front preload which resolved a lot of the issues with the front but I will not go above 80MPH unless I am passing someone because it still is a little squirrely with TKCs.
runnin4melife is offline   Reply With Quote
Old 12-22-2012, 05:54 AM   #14
Indy Unlimited
Beastly Adventurer
 
Indy Unlimited's Avatar
 
Joined: Jan 2007
Location: Parker, CO
Oddometer: 1,262
I have topped out my bike a few times and agree that the front end is extra light.
That said it makes it much easier to ride off road with a light front end.
I use the Ralle - Moto steering stabilizer and it works very well to stabilize the bike at high speed.
I use Anakees when going that fast. I don't go over 75 mph on dual sport tires as a general rule.
Try a stabilizer.

http://www.rallemoto.com/contents/en-us/d30.html
__________________
Current Stable:

2013 Ducati Hypermotard SP, 2011 Husaberg FE570S, 2011 BMW S1000RR, 2010 BMW F800GS
2007 Husqvarna TE610 , 2003 KTM 525 MXC
Indy Unlimited is offline   Reply With Quote
Old 12-22-2012, 07:47 AM   #15
JRWooden
Beastly Adventurer
 
Joined: Jul 2008
Location: The great state of confusion
Oddometer: 4,146
Sorry if I missed it ...
Is dropping the front fork tubes in the triple tree by (say) 10mm a potential solution?
JRWooden is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


Times are GMT -7.   It's 09:51 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014