Voilà. Sur le site "http://www.k1600forum.com", je suis tombé sur ce récit, fait par un propriétaire de K1600 qui semble avoir découvert la cause du tirage à gauche de sa mob. Le texte est en anglais. Mais si ça peut aider, je pense que cela vaut la peine. Non ?
"By accident I caught light showing under the flange of the bushing (fork clamp on bushing was torqued ?) and found I could loosely fit a 5 thousandths feeler gauge under the flange on the bottom and not the top. There is a pic in my profile. When I found this the axle was installed, torqued & axle clamp was torqued?? So the axle shoulder was not flush against the bushing (cocked) enough to throw the front wheel out of true between 1/16 & 1/8 + - inch at the center of the tire. Its also possible this spread or torqued the fork legs.
Not 100% accurate but you can check front wheel with a strait edge against the machined outer surface of the right fork leg to a strait edge across the edges of the rotors at vertical and 90 degrees (do not move wheel).
When I straitened out the bushing and re torqued everything the wheel came back to true and my riding experience improved. I could now ride no hands (not recommended) & correct for any drift left or right.
Like I said I was on the same tires and still noticed the difference now that I have a 1000 miles on the same tires with the axle strait Ive even noticed the tire wear coming back more where it should. I did also increase the tire pressure to 44 psi to help re wear the tire in.
There are lots of variables with this problem (weight in panniers/bags, road your on, tire pressure,wear on tires etc etc) including peoples description of what is actually going on with the bike when the left pull happens. My bike was actually leaning to the left like I was putting weight on the left peg immediately when I let go of the bars (gyro effect of wheel) and pulling/steering left. The lean I was getting matched up with my findings of the front tire being off true vertically.
In any event that's what helped my issue and from my experience it only takes the axle being out thousandths to cause noticeable problems and it can be out in any of 180 degrees so the effect/feel it gives you may be different. May be why rotating the axle help in some cases.
If this info helps YOUR pull issue great!! if not I guess we'll just have to keep working on this issue. "
"By accident I caught light showing under the flange of the bushing (fork clamp on bushing was torqued ?) and found I could loosely fit a 5 thousandths feeler gauge under the flange on the bottom and not the top. There is a pic in my profile. When I found this the axle was installed, torqued & axle clamp was torqued?? So the axle shoulder was not flush against the bushing (cocked) enough to throw the front wheel out of true between 1/16 & 1/8 + - inch at the center of the tire. Its also possible this spread or torqued the fork legs.
Not 100% accurate but you can check front wheel with a strait edge against the machined outer surface of the right fork leg to a strait edge across the edges of the rotors at vertical and 90 degrees (do not move wheel).
When I straitened out the bushing and re torqued everything the wheel came back to true and my riding experience improved. I could now ride no hands (not recommended) & correct for any drift left or right.
Like I said I was on the same tires and still noticed the difference now that I have a 1000 miles on the same tires with the axle strait Ive even noticed the tire wear coming back more where it should. I did also increase the tire pressure to 44 psi to help re wear the tire in.
There are lots of variables with this problem (weight in panniers/bags, road your on, tire pressure,wear on tires etc etc) including peoples description of what is actually going on with the bike when the left pull happens. My bike was actually leaning to the left like I was putting weight on the left peg immediately when I let go of the bars (gyro effect of wheel) and pulling/steering left. The lean I was getting matched up with my findings of the front tire being off true vertically.
In any event that's what helped my issue and from my experience it only takes the axle being out thousandths to cause noticeable problems and it can be out in any of 180 degrees so the effect/feel it gives you may be different. May be why rotating the axle help in some cases.
If this info helps YOUR pull issue great!! if not I guess we'll just have to keep working on this issue. "