High Speed Wobble

[GlennTuc]

Got the wobble on the way to work this morning at 76 mph (GPS indicated). Slowed down to 65 and the wobble subsided. Temp was 34 degrees and air pressure in tire is at 35 psi. I'll try different air pressures to see if that will take care of the problem. I work hard trying to make BabyDoll weathy, but I don' want to make her wealthy and a widow at the same time.

 

Glenn

[Cougar]

Take the bike back to the shop , since it is an 08 (warrenty)

have them check the tree bearings. just a thought.

 

maybe front tire is bad?

 

I had a high speed wobble on a KZ 1000 years ago

went down at 75 mph. it was not a pretty site, I lived

bike did not.

 

TAKE CARE OF THAT PROBLEM ASAP.

 

Never appliey front brake in a high speed wobble as well.

 

Jeff

[GlennTuc]

I guess it would be more of a squirm than a wobble, and its coming from the rear. I'll play around with tire pressure and shock pressure and try to find the sweet spot.

 

Glenn

[Cougar]

Gattcha,, now that is a different problem!

[dragerman]

I believe you’re talking about a car tire??

 

One of the things that concerns me with installing a car tire on a motorcycle is the ‘install pressure’ that is required to seat them on the MC rim. I believe that it is important to keep the tire ‘install pressure’ as low as possible in order to avoid 'over stressing' the tire. I’ve seen it written on at least one CT not to exceed 50 psi when seating the bead. Inflating any tire to its near bursting point can’t be good for it, 80... 90... 100 lbs + seems excessive to me. One member here has has a tire burst tring to install it. I've often wondered if those who experience this ‘wobble’ have inadvertently over inflated their tire and compromised its structural integrity which in turn could affect its stability.

 

I'm not saying that it can't be done but rater drawing some attention to 'cause and affect'. Sometimes to figure out what a problem 'is' you have to first know what it "isn't"... process of ilimination. Inflation, bearings, front tire are all important considerations that have to be checked.

[flb_78]

You'll just have to play with the pressures and find what works for your bike. Im running 32 in my Kumho right now. No wobble up to 100mph. My BFG I ran at 40.

[tsigwing]

Got the wobble on the way to work this morning at 76 mph (GPS indicated). Slowed down to 65 and the wobble subsided. Temp was 34 degrees and air pressure in tire is at 35 psi. I'll try different air pressures to see if that will take care of the problem. I work hard trying to make BabyDoll weathy, but I don' want to make her wealthy and a widow at the same time.

 

Glenn

 

How many miles on the rear? I would take the pressure up to the max for the first few hundred miles then start dropping by two pound increments. Also be sure your front tire is at the right pressure.

[starkruzen]

Could be that the tire is cold...and need to warm up bit to round out.

[OB-1]

Some bikes will tolerate a car tire and some won't. I tried a CT on my bike and went back to an MC tire. Some guys swear by CT's, but it didn't work on my bike.

[hcdagen]

Put dyna beads or some other dynamic balancer in your tires both front and back.I had a bad wobble and tried adjusting pressure,tightening the tree bearings etc etc.Put in the dyna beads [2oz in front 4oz in back] problem solved.Can take the bike up to 110 and not a hint of a wobble or shake

[GlennTuc]

The bike rode good on the way home yesterday. When I got home I checked the air pressure in the tires. The front had 32 psi and the rear had 36. I reversed the pressure. I have an Avon Venom on the front with about 5000 miles on it, I took the pressure to 36 psi and I lowered the rear to 32 psi. On the way to work this morning it rode great. Very smooth. Hopefully that'll do it. If not, I'll do the 44 psi thing and drop the pressure 2 lbs at a time. If that don't work, its dyna beads. I'm not giving up easily on this car tire. Thanks everyone for the help. The experiences shared by the people on this site are priceless.

 

Thanks,

 

Glenn

[Wanderer]

The bike rode good on the way home yesterday. When I got home I checked the air pressure in the tires. The front had 32 psi and the rear had 36. I reversed the pressure. I have an Avon Venom on the front with about 5000 miles on it, I took the pressure to 36 psi and I lowered the rear to 32 psi. On the way to work this morning it rode great. Very smooth. Hopefully that'll do it. If not, I'll do the 44 psi thing and drop the pressure 2 lbs at a time. If that don't work, its dyna beads. I'm not giving up easily on this car tire. Thanks everyone for the help. The experiences shared by the people on this site are priceless.

 

Thanks,

 

Glenn

 

I had help with mine from a local Harley mechanic, who bubble balanced mine, but I am also thinking of going ahead with the DynaBeads. Although since going to 35lbs in the rear it feels pretty good.

I'm more concerned with the front OEM Dunlop, that I thought, looked to be cupping just a tad.

I probably won't do anything now until spring, but I'm very satisfied with my trip to the darkside.

[footsie]

Glenn

This really does not make sense, but the CT works much better after it is broken in, at about 5000 miles. I run 32 in rear, I have about 10,000 miles on mine now.

 

 

Gregg

[tsigwing]

Put dyna beads or some other dynamic balancer in your tires both front and back.I had a bad wobble and tried adjusting pressure,tightening the tree bearings etc etc.Put in the dyna beads [2oz in front 4oz in back] problem solved.Can take the bike up to 110 and not a hint of a wobble or shake

 

I've got them in the front and the rear and won't ever run without them. I actually forgot they were in there.

[GlennTuc]

I've got them in the front and the rear and won't ever run without them. I actually forgot they were in there.

 

Just got through ordering them for front and rear.

 

Glenn