Got another question on my new (to me) 95 intruder 800.
Bike runs great and feels stable at low speeds (up to 60), but at highway speeds (around 60-70), the bike begins to feel a bit unstable. Just like it is loose and "wiggles" slightly in the lane. Being a new rider, I am not sure if this is normal or if something this wrong.
Potentially a rear tire alignment issue? or a steering head bearing? Or does it sound like someone just not used to the bike?
I am planning on going through the bike with a fine tooth comb this winter and servicing a lot of components, want to know what I should add to the list to help remedy this. Thanks!!
Instability at highway speeds
-
- Tricycles are Cool
- Posts: 5
- Joined: Tue Oct 03, 2017 1:05 pm
- My Bike: 95 intruder 800
- WintrSol
- Joined a 450cc Club
- Posts: 857
- Joined: Fri Feb 26, 2016 2:02 pm
- My Bike: CB450 GL1500CT
- Location: Near St. Louis, MO
Re: Instability at highway speeds
Start with tire pressures. If the tires are over 6 years old, replace them, then try to find the recommended pressures given by the manufacturer. I last had Avon tires on my 800, and the pressures were a few pounds higher than that stated on the ID tag; running the tag pressures made it a bit unstable.
If you have access to a lift, get the front wheel off the ground, and tie the bike down. Tighten all bolts to spec first, top to bottom of the whole steering assembly. Grab the front wheel at top and bottom, and try to shift it by pushing/pulling the top while doing the opposite at the bottom - this should reveal looseness in the axle bearings. Spin the wheel, too, and listen for anything but smooth running bearings; you could have a slightly warped rotor, which should be visibly wobbling when spun. Pass that test? Then try pulling just the bottom of the wheel from side to side, and feel for any motion in the forks; if you feel any wobble at all, the steering bearings may need adjusting.
After checking torque at the rear suspension and axle, try moving the rear wheel around in a similar manner, though the wheel bearings may be hard to assess because of the shaft drive.
If you have access to a lift, get the front wheel off the ground, and tie the bike down. Tighten all bolts to spec first, top to bottom of the whole steering assembly. Grab the front wheel at top and bottom, and try to shift it by pushing/pulling the top while doing the opposite at the bottom - this should reveal looseness in the axle bearings. Spin the wheel, too, and listen for anything but smooth running bearings; you could have a slightly warped rotor, which should be visibly wobbling when spun. Pass that test? Then try pulling just the bottom of the wheel from side to side, and feel for any motion in the forks; if you feel any wobble at all, the steering bearings may need adjusting.
After checking torque at the rear suspension and axle, try moving the rear wheel around in a similar manner, though the wheel bearings may be hard to assess because of the shaft drive.
Florissant, MO
CB450K3, GL1500CTValkyrie
CB450K3, GL1500CTValkyrie
-
- Joined a 1100cc Club
- Posts: 5474
- Joined: Thu Dec 29, 2016 12:33 pm
- My Bike: VS800
Re: Instability at highway speeds
Totally agree on adjusting your air pressure. change by a few pounds till you find the sweet spot.
I run Pirelli MT66 tires at 36psi Front and 38 Rear,
your results may vary.
I run Pirelli MT66 tires at 36psi Front and 38 Rear,
your results may vary.
-
- Joined a 250cc Club
- Posts: 610
- Joined: Mon May 08, 2017 8:16 pm
- My Bike: 99 Valkyrie Interstate- 05 S83
- Location: Griffithville, Arkansas
Re: Instability at highway speeds
Mine was wobbly when changing lanes. New tires cured it completely.
Arthritis sucks!
-
- Tricycles are Cool
- Posts: 5
- Joined: Tue Oct 03, 2017 1:05 pm
- My Bike: 95 intruder 800
Re: Instability at highway speeds
Update: new tires front and rear and she is much more stable. Thanks!
-
- Joined a 250cc Club
- Posts: 610
- Joined: Mon May 08, 2017 8:16 pm
- My Bike: 99 Valkyrie Interstate- 05 S83
- Location: Griffithville, Arkansas
Re: Instability at highway speeds
Glad it's better. Now get out and enjoy her!Bryced1 wrote:Update: new tires front and rear and she is much more stable. Thanks!
Arthritis sucks!