High speed wobble

[seelyark1]

Running along at 70 mph and hit a small bump that started the bike to wobble. I deccelerated and the wobble went away. Got to checking to try to find what caused it to begin with. Seems that while straddeling the bike and turning the handlebars side to side quickly, the whole bike shakes like the wheels are loose. Put on center stand and checked the rear tire and doesn't seem loose and the swing arm seems solid. Jacked up front tire and all seems solid. Any ideas?
Also just finished the "What every one do for a living". Took 2 evenings to read all 8 pages. Will try later to get it started again. Seems I have a lot in common with a lot of other Wing riders.
Thanks!

[redial]

Has the GW got a fork brace?

[seelyark1]

Yes it does. Going to recheck the rear tire pressure in the morning. Is strange as the whole bike shakes. Will keep looking til I figure it out. Just standing there and the whole bike shakes but the front wheel stays steady. Just the change in caster of the front wheel turning side to side sets it off. Was one of the reflectors on the road that started it. The more I think about it, the more I think it is from the rear end some how.

[WingAdmin]

Yes it does. Going to recheck the rear tire pressure in the morning. Is strange as the whole bike shakes. Will keep looking til I figure it out. Just standing there and the whole bike shakes but the front wheel stays steady. Just the change in caster of the front wheel turning side to side sets it off. Was one of the reflectors on the road that started it. The more I think about it, the more I think it is from the rear end some how.

Check the swing arm pivot for correct torque and the pivot bearings for looseness. My GL1100 did the exact same thing, and that's what the cause ended up being - the pivots were inserted incorrect (left one on right side and vice versa), and torqued incorrectly. Once put in correctly and torqued to the correct value, the wobble disappeared.

[seelyark1]

Have yet to find out what that torque is supposed to be. Spent most of the day reading on here as the rain was being blown into the garage, and I wasn't going to lay in it. Tomorrow is supposed to be better. At least it isn't snow. Went and picked up the new tining belts this AM and had to steal the wifes truck for that.

[RoadRogue]

While you have it apart you may as well check the steering head bearings. I am willing to bet a cookie they are in need of some attention ,be it a cleaning and new grease if applicable, and a re-torque.
Too loose can cause wobbles too. At least have a look to give you peace of mind.

[dingdong]

Left pivot bolt is 14 lbs and the lock nut is 72 lbs.

Edit: forgot to mention that you will need a "special" tool to do this job. I made my own.

[seelyark1]

Thanks for the info. This retirement is not all it is cracked up to be. Two days and I still haven't had a chance to check out my problem. With a little luck I will get a chance to check it out tomorrow without all the "honey do" list getting any longer garbage.

[Sidcar]

Check:
Tyre tread wear
Tyre pressures
Wheel bearings
Swinging arm bearings
Head race bearings
Fork oil level
Rear dampers

Still wobbling?
Junk in saddlebags or trunk (weight distribution)
I've found some tyres cause "white line wobble" even though they're only half worn.