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 06-06-2010, 03:56 PM   #1
Matt W OP
Gnarly Adventurer
 
Matt W's Avatar
 
Joined: Oct 2008
Location: Clarkston Mi
Oddometer: 343
30-40 mph wobble

I read and searched all around and couldn't find anywhere if anyone has had the problem of a wobble at about 30-40 mph. It's as if the wheel is egg shaped. Really bad if in 3rd gear and cruising to the light, rpms are at about 3k to 3.5k? Any suggestions? I have Tourances on that were balanced at stealership. I thought they were maybe balanced wrong but isn't the wobble supposed to get worse as speed goes up?
__________________
"All you need in this life is ignorance and confidence, and then success is sure."
Mark Twain
Matt W is offline   Reply With Quote
Old 06-06-2010, 03:59 PM   #2
SoDak
Adventurer
 
Joined: Jul 2006
Location: Black Hills of SD
Oddometer: 66
Start easy, take the bike into a shop and see if the rim is bent or if the wheel is not properly balanced.
SoDak is offline   Reply With Quote
Old 06-06-2010, 04:47 PM   #3
raider
Big red dog
 
raider's Avatar
 
Joined: Jan 2005
Location: Adelaide, South Australia
Oddometer: 1,582
What tyres are you running? I recently swapped to a TKC80 front and it behaves like Tom Cruise on Oprah's couch at certain speeds. Something to do with resonant frequencies.
__________________
14 R1200GS Adventure
raider is offline   Reply With Quote
Old 06-06-2010, 08:19 PM   #4
EnderTheX
Drunken Squirrel
 
EnderTheX's Avatar
 
Joined: Mar 2009
Location: DFW Area, TX
Oddometer: 2,710
I agree... most likely resonant frequencies. Just because they were balanced at your dealer doesn't mean they did it correctly... A couple years back a crappy motorcycle shop here in Dallas let me out the door with 10 psi in my tires and about 2 pounds of weights on the wheel... they didn't remove the old weights.

Anyways, I had problems at 40mph (almost exactly) on my last set of tires that were severely shark-finned.. The knobbies had word hard on the leading edge of the front tire and caused an earth shaking resonance at 40 mph, was fine at 30 and 50. I changed rubber shortly after and the tires and rims were fine...
EnderTheX is offline   Reply With Quote
Old 06-07-2010, 01:02 AM   #5
-W-
Flying Finn
 
Joined: Nov 2009
Location: Finland
Oddometer: 193
Quote:
Originally Posted by raider
What tyres are you running? I recently swapped to a TKC80 front and it behaves like Tom Cruise on Oprah's couch at certain speeds. Something to do with resonant frequencies.
I have the same thing with front TKC. Worst speed is exactly 30-40mph..
-W- is offline   Reply With Quote
Old 06-07-2010, 04:00 AM   #6
JRWooden
Beastly Adventurer
 
Joined: Jul 2008
Location: The great state of confusion
Oddometer: 4,128
Slack in the headset bearings might contribute?
The procedure to adjust is very straight-forward.
JRWooden is offline   Reply With Quote
Old 06-07-2010, 05:39 AM   #7
Matt W OP
Gnarly Adventurer
 
Matt W's Avatar
 
Joined: Oct 2008
Location: Clarkston Mi
Oddometer: 343
Quote:
Originally Posted by raider
What tyres are you running? I recently swapped to a TKC80 front and it behaves like Tom Cruise on Oprah's couch at certain speeds. Something to do with resonant frequencies.
I am running the Tourances and they are new, it's weird, if I run out 2nd gear to 5k its not as bad. Just seems strange to have to sport bike the gears to avoid the wobble. I will have a different shop check the balance job and maybe check the head bearings. Thanks guys. On a side note, it did the same with the TKC's at about 35 mph so I thought more road tires would fix this.
__________________
"All you need in this life is ignorance and confidence, and then success is sure."
Mark Twain
Matt W is offline   Reply With Quote
Old 06-07-2010, 08:25 AM   #8
Navaho
Beastly Adventurer
 
Navaho's Avatar
 
Joined: Oct 2005
Location: Baton Rouge, LA
Oddometer: 1,034
Mine is doing the same thing between 35 - 45 mph (09 F650 Twin). My preload is increased front and rear. Front tire is worn 50% (Tourance), and I hear a noise that I suspect might be some slack in the steering head. Anyone of those could be the culprit.

I checked already, and the rim is not bent. I'm going to adjust one thing at a time and see where the problem is.
__________________
'07 450EXC, '06 950 Supermoto, '09 YZ450F
Navaho is online now   Reply With Quote
Old 06-07-2010, 08:11 PM   #9
RED CAT
Bumpy Backroader
 
RED CAT's Avatar
 
Joined: Jun 2005
Location: Western Canada
Oddometer: 2,781
Common!

Problem with the front Tourances once they get a little worn. Best to run a Tourance Rear for long wear and an Anakee Front for no wobbles.
RED CAT is offline   Reply With Quote
Old 06-08-2010, 09:22 AM   #10
v8toilet
Nothing to see here.
 
v8toilet's Avatar
 
Joined: Jul 2005
Location: Northwest U.S.
Oddometer: 1,709
TKC front same... 35 mph could make some folks sick I bet... Had mine rebalanced twice by different folks all same result...
v8toilet is offline   Reply With Quote
Old 06-08-2010, 11:36 AM   #11
JoelWisman
Beastly Adventurer
 
JoelWisman's Avatar
 
Joined: Apr 2009
Location: STL, MO, USA
Oddometer: 1,392
I'm not sure what we are talking about here.

Wobble, shimey, slapper... Are all slang, used fairly specifically by professionals but with every meaning under the sun by motorcyclist.

So..... Are the bars going back and fourth, or up and down? Does this happen while firmly gripping the bars, or with your hands in the air? Does power make it better or worse? Same question with brakes, and which brake has what effect?

Are your wheels true and round? Is your head bearing loose, or your rear fork loose? Stiff links in chain, chain loose?

Give me a clue and I'll try to help but I need a few mour nouns and adjitives :)
__________________
Owned to date. Honda Aero 50, Honda Elite 80, Honda Elite 250x2, Suzuki Katana, Suzuki RF600, Yamaha YZF1000R, Kymco Xciting 500, Suzuki GS500, Suzuki Burgman 650, BMW F800GSx2, BMW S1000RR, Aprilia Scarabeo 200, Aprilia Caponord, Aprilia Sportcity 250
I love and miss you Jeneca and I'm sorry.
JoelWisman is offline   Reply With Quote
Old 06-08-2010, 01:05 PM   #12
Matt W OP
Gnarly Adventurer
 
Matt W's Avatar
 
Joined: Oct 2008
Location: Clarkston Mi
Oddometer: 343
Quote:
Originally Posted by JoelWisman
I'm not sure what we are talking about here.

Wobble, shimey, slapper... Are all slang, used fairly specifically by professionals but with every meaning under the sun by motorcyclist.

So..... Are the bars going back and fourth, or up and down? Does this happen while firmly gripping the bars, or with your hands in the air? Does power make it better or worse? Same question with brakes, and which brake has what effect?

Are your wheels true and round? Is your head bearing loose, or your rear fork loose? Stiff links in chain, chain loose?

Give me a clue and I'll try to help but I need a few mour nouns and adjitives :)
OK I will try my best, non mechanic here.. The front end is going up and down as if I am riding the whoops. It starts at about 30 mph and goes till about 40, its more pronounced if I am cruising to the light(coming down in speed) and the bike hits 3000 rpm's or if I change gears a little early and really don't run it out more and shift at 4 or 5k. My grip can be light or off completely and same thing happens. The power seems to help a bit by means of running it more like a sport-bike, high rpms.

Just had a different dealership take a look and wheels are round, no head bearing issues they said. Define rear fork loose? Chain links are all good also. Thanks for any help and hope this helped.
__________________
"All you need in this life is ignorance and confidence, and then success is sure."
Mark Twain
Matt W is offline   Reply With Quote
Old 06-09-2010, 04:22 AM   #13
EasyJet_RC
Joyrider
 
Joined: Jun 2009
Location: Canberra (for now)
Oddometer: 51
Same Same

Had the same isue with a Tourance on the way to Perth last year...

Swaped 2 Anakee = wobble gone !
EasyJet_RC is offline   Reply With Quote
Old 06-09-2010, 05:30 AM   #14
AdvWolf
Gnarly Adventurer
 
AdvWolf's Avatar
 
Joined: May 2010
Location: The Mountains -Almost Heaven, WV
Oddometer: 255
I was told early on to back off the preload. It reduced the wobble on the front of the bike. Made a big difference. I also put a set of Roz risers ( up and forward) and made my seated position handle much better.
AdvWolf is offline   Reply With Quote
Old 06-09-2010, 05:38 AM   #15
Matt W OP
Gnarly Adventurer
 
Matt W's Avatar
 
Joined: Oct 2008
Location: Clarkston Mi
Oddometer: 343
Thanks for all the help

I appreciate the input, thx guys.
__________________
"All you need in this life is ignorance and confidence, and then success is sure."
Mark Twain
Matt W 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 09:26 AM.


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