ADVrider

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 01-14-2013, 09:45 AM   #1
FourG OP
Adventurer
 
Joined: Nov 2011
Oddometer: 31
Question Alignment issue 1150 GS

Alright keyboard mechanics, I've got one for you.

Recently my 2000 1150 GS seems to have decided it doesn't want to ride on the straight and narrow any longer.

Symptoms:
  • Since I've owned the bike it's always wanted to stray right when I let off the bars... It was never an issue per say as I felt the bike had tracked straight with my hands on the bars.
  • (Recently) when riding the bike in a straight line on the highway I'm noticing I need to give it a little left bar input which makes the bike lean slightly to the left when trying to go straight.

Things I've tried (admittedly not a lot, yet)
  • I've eliminated the "crown in the road" theory by briefly riding on the opposite side with the same effect
  • Checked the haynes manual for any kind of alignment procedure. What they listed didn't seem too scientific so I haven't really tried it.
  • Loosened the fork clamps and tried to let it naturally find it's resting place, torqued them back up to spec
  • Checked the final drive for play
  • Checked tire pressure
  • Check the front tire for play
  • Checked if the spoked wheels are true
  • Visually inspected both wheels for any camber issues
  • Tried riding without the system cases

Other things to note:
  • Two brand new tourances mounted and balanced by me
  • I ride with the system cases almost 100% of the time, although I've tried riding without them and I have the same issue.

What should be my next steps? Anyone else ever encounter this issue?

FourG screwed with this post 01-14-2013 at 11:16 AM
FourG is offline   Reply With Quote
Old 01-14-2013, 10:21 AM   #2
Rockmuncher
Studly Adventurer
 
Rockmuncher's Avatar
 
Joined: Apr 2010
Location: Western Canada
Oddometer: 756
Mine was doing that too. My windshield was cocked to one side a bit. Helped but still have a little pull with hands off.
Rockmuncher is offline   Reply With Quote
Old 01-14-2013, 10:38 AM   #3
FourG OP
Adventurer
 
Joined: Nov 2011
Oddometer: 31
Quote:
Originally Posted by Rockmuncher View Post
Mine was doing that too. My windshield was cocked to one side a bit. Helped but still have a little pull with hands off.
So your windshield was cocked enough to give you the illusion it was leaning? I've suspected a placebo effect like this... I think I might buy a cheap bubble level and attach it to the console to see what physics reports..
FourG is offline   Reply With Quote
Old 01-15-2013, 04:25 AM   #4
Rockmuncher
Studly Adventurer
 
Rockmuncher's Avatar
 
Joined: Apr 2010
Location: Western Canada
Oddometer: 756
Quote:
Originally Posted by FourG View Post
So your windshield was cocked enough to give you the illusion it was leaning? I've suspected a placebo effect like this... I think I might buy a cheap bubble level and attach it to the console to see what physics reports..

No placebo effect will make the bike turn. If the windshield is not straight, the wind will push harder to one side. Maybe it's only an issue with Tobinators installed.
Rockmuncher is offline   Reply With Quote
Old 01-15-2013, 04:41 AM   #5
bemiiten
League of Adventures
 
bemiiten's Avatar
 
Joined: Jul 2003
Location: Hamilton NJ.
Oddometer: 4,815
Heavy crankshaft spinning along the bikes axis causes a torque effect. They all do it.
bemiiten is offline   Reply With Quote
Old 01-15-2013, 05:11 AM   #6
manfromthestix
Lost in Space
 
manfromthestix's Avatar
 
Joined: Dec 2004
Location: Lexington, Virginia
Oddometer: 2,116
It was also the first time I had ever taken the wheels off the bike since owning it.

Maybe you put it back together a bit wrong or twisted? Try taking it apart again, clean any dirt/grime from the wheels, speedo gear, check all is correct and re-install.

I've got a 2001 1150GS that tracks straight and true no matter how off-balance the side cases are. Most of the time my save-yer-own-ass tool kit (tire irons, repair stuff, pump, etc.), first aid kit, 1/2 cover, ROK straps, and assorted other crap are crammed into my left side case and the right will have a bottle of water and a jacket liner = very unbalanced with no noticeable drift or lean. I do notice, however, that it falls into corners differently when one side case is significantly heavier than the other. I have never experienced the PTTR (pull to the right) phenomenon common on older RTs.

Speaking of older RTs, I had a 1997 1100RT that really did PTTR regardless what I did to it, and it was significantly more obvious if the bags were unbalanced. The previous owner of that bike had boinked into a curb pretty hard, so the front end was tweaked. I had a BMW shop go through it and they found that the ball joint on the telelever (#10 in the drawings above) had been knocked hard enough to make it very slightly bent, so I replaced that and it REALLY helped. They disassembled the forks and found one was very slightly bent (replaced slider), checked the clamps, axle, ABS ring, all OK, front wheel (slightly bent and replaced), and put it all back to spec. The PTTR thing was still there but it was very mild, could be overcome by adding a little weight to the left side of the bike (like a couple pounds of stuff in the little glove box in the fairing). If I remember correctly, most people thought the RT's PTTR issue was because the rear wheel tracked slightly differently from the front (both were running straight down the road, just on slightly separated parallel lines) and an aftermarket shim would have aligned it better, but it was never noticeable enough with proper loading that I felt it was necessary. After getting the front end repaired I just rode it 50,000 happy miles before selling it. My GS has never had that issue.

I say take the wheels back off, look everything over carefully, compare to pictures in a good shop manual, clean everything real good, put it back together again and see if that helps. I did a tire change and balance thread for the GS a few years ago, maybe this will help:

http://www.advrider.com/forums/showthread.php?t=148614

Doug
__________________
"If it doesn't blow smoke and make noise, it isn't a sport!" - radio ad for shop in Bozeman, MT
manfromthestix is offline   Reply With Quote
Old 01-14-2013, 10:43 AM   #7
M38A1
Type-A Introvert
 
M38A1's Avatar
 
Joined: Apr 2006
Location: Central Tejas
Oddometer: 309
Crown in the road?

Riding in the same lane of travel for a tad bit more tire wear on one side combined with the crown?

.
M38A1 is offline   Reply With Quote
Old 01-14-2013, 10:51 AM   #8
FourG OP
Adventurer
 
Joined: Nov 2011
Oddometer: 31
Quote:
Originally Posted by M38A1 View Post
Crown in the road?

Riding in the same lane of travel for a tad bit more tire wear on one side combined with the crown?

.
Yeah, I should have put that in the "things I've tried." I know the roads are crowned but this is "new," meaning it feels different than it used to. I've also tried eliminating that variable, still happens.

Also, brand new tires that were newly balanced and mounted by me.
FourG is offline   Reply With Quote
Old 01-14-2013, 10:56 AM   #9
bdarling
Gnarly Adventurer
 
bdarling's Avatar
 
Joined: May 2010
Location: San Diego, CA
Oddometer: 405
Let's rule out the obvious: weight in your side cases.

I got a new laptop at work that weighs SIGNIFICANTLY more than my old computer and I was shocked by the amount of steering input I needed to keep the bike going in a straight line with the computer bag in my right pannier. Just to verify that the computer was the culprit, I moved the bag to my left pannier and found myself correcting the other way. Solution: leave the damned electronic leash at work!

I suppose your response will be that you don't ride with side cases

-B
__________________
SoCal Dual Sport - http://www.socaldualsport.com
bdarling is offline   Reply With Quote
Old 01-14-2013, 11:15 AM   #10
FourG OP
Adventurer
 
Joined: Nov 2011
Oddometer: 31
Quote:
Originally Posted by bdarling View Post
Let's rule out the obvious: weight in your side cases.

I got a new laptop at work that weighs SIGNIFICANTLY more than my old computer and I was shocked by the amount of steering input I needed to keep the bike going in a straight line with the computer bag in my right pannier. Just to verify that the computer was the culprit, I moved the bag to my left pannier and found myself correcting the other way. Solution: leave the damned electronic leash at work!

I suppose your response will be that you don't ride with side cases

-B
Actually, you've identified another line item I forgot to add to the "things I've tried." I do always ride with the side cases and a laptop in the right side... however it's a tiny little Macbook Air and I've also tried riding without the side cases to eliminate a variable... same issue.

Keep the thoughts coming! We're narrowing in!
FourG is offline   Reply With Quote
Old 01-14-2013, 11:34 AM   #11
SkiFly01
Govna Racepipe
 
SkiFly01's Avatar
 
Joined: Nov 2009
Location: Gainesville, FL
Oddometer: 579
counterbalance, carry a bag of concrete.
__________________
Kai
2008 BMW GSA
2000 Kawasaki Super Sherpa
SkiFly01 is offline   Reply With Quote
Old 01-14-2013, 11:52 AM   #12
JRP
Old guy
 
JRP's Avatar
 
Joined: Apr 2004
Location: Hampden, MA
Oddometer: 1,470
Have you checked to see if the forks were twisted in the triple clamps?
I will assume you have ruled out a bent fork tube, you would remember if you hit anything that hard
__________________
"What could possibly go wrong? " The Jerk
2012 TE 250
2010 F 650 GS
1983 R 80 G/S
JRP is offline   Reply With Quote
Old 01-14-2013, 12:28 PM   #13
FourG OP
Adventurer
 
Joined: Nov 2011
Oddometer: 31
Quote:
Originally Posted by JRP View Post
Have you checked to see if the forks were twisted in the triple clamps?
I will assume you have ruled out a bent fork tube, you would remember if you hit anything that hard


I'm assuming we're talking about the fork bridge(10)? Yes, I've tried that.
FourG is offline   Reply With Quote
Old 01-14-2013, 02:46 PM   #14
Twilight Error
Going nowhere slowly
 
Twilight Error's Avatar
 
Joined: May 2002
Location: The Submarine Mines
Oddometer: 22,464
Quote:
Originally Posted by JRP View Post
Have you checked to see if the forks were twisted in the triple clamps?
I will assume you have ruled out a bent fork tube, you would remember if you hit anything that hard
He may not. His insurance co-pay certainly would.
__________________
If you're all about the destination, take a fucking flight.
Twilight Error is offline   Reply With Quote
Old 01-14-2013, 12:27 PM   #15
scooteraug02
Dog Rancher
 
scooteraug02's Avatar
 
Joined: Feb 2003
Location: Atlanta, GA
Oddometer: 4,312
Brand new tires will do that until the get a flat spot then you should be able to ride hands off no problem.

Started our AK trip with new tires and the bike was all over. I thought it was the load but after a few K miles it road hands off straight for as long as I wanted.

If you ride hands off enough you can trim it straight with body english or a little hand in the wind.

Do you carry more weight in one bag than the other. Maybe you have worn a groove in the tire that is noticeable when the bags are empty.

http://www.framestraightsystem.com/M...me%20Check.htm
http://www.ibmwr.org/otech/whelalin.html
__________________

scooteraug02 screwed with this post 01-14-2013 at 12:33 PM
scooteraug02 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 12:32 PM.


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