Author Topic: wobble in front tire from 30-40 mph  (Read 2269 times)

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Offline Just Cliff

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Re: wobble in front tire from 30-40 mph
« Reply #25 on: June 10, 2017, 12:34:50 pm »
I have to agree with Mike. I've been through a dozen sets of Avon's & haven't had any head shake.

Cliff   :beerchug:

Offline glenn 12

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Re: wobble in front tire from 30-40 mph
« Reply #26 on: July 08, 2017, 02:47:21 am »
I just replaced a bridgestone evo that was on the front. It had started to develop a shake, but it was near the end of it's life. A little over 13k on the tire. I replaced it with a angel gt and the head shake is gone now.
12 c-14, 91 vfr750

Offline Rev Ryder

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Re: wobble in front tire from 30-40 mph
« Reply #27 on: July 08, 2017, 12:00:07 pm »
Well, I've had bad Avons, but the stem bearing adjustment is usually the culprit for the described behavior. A bad tire (belt, bulge, out of round)'generally gets worse with speed. An unseated bead will too. Balance can be vibration at varying speeds, but steering stem adjustment (when loose) presents in the same approximate speed range of 35 to 50 mph and most pronounced on decal. If too tight the bike weaves left and right and wears the rider out correcting it.  Why one tire will decal wobble more than another (A bond do it a lot) is mostly tread pattern with aggressive, curvy treads exhibiting perhaps more wobble than straighter treads or centerline type treads (the ones that follow rain grooves so badly).  Yes, a change of tire may, and often does, cure it for a while which makes it appear as though it were the tire.  But almost always, proper stem adjustment cures the issue. If it still wobbles, it's probably still not right. It can be an illusive adjustment for a lot of folks who think they've got it so tight it can't happen, but it still does. Usually a little more is all it takes. But too tight is even worse than too loose.
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Offline MAN OF BLUES

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Re: wobble in front tire from 30-40 mph
« Reply #28 on: July 08, 2017, 08:01:11 pm »
I've not tried avons on the C14 yet, and probably won't, as I've had happy joy with the PR series tires since '07

Chuck, the C14 does exhibit different signs on the head bearings usually, than you and I and all the other C10 owners came to know as the fault for headshake.
The C14 has "balls" ( in more ways than one, easy boys... jk) where the C10 was using tapered roller bearings, which while robust, required a little more attention to clean, lube, and tightening...
Not so much on the C14..
I found more often, that when we stuck on a New set of Avon Azaro's, which were great tires up until 2007, they would "tell you" the head bearings needed attention... it wasn't the tires fault back then, it was the fact it would show that the bearings were in need of "fixing"....
Then it all went to hellinahandbasket when the Azaros started showing defects around '07-'08...
Once you start "piloting" your new bike, you'll see what I mean, and all thoughts about bike mainainence (mainainence? What is that word...?) Will dissapear...
And all you end up doing is burning fuel, and tires, and smiling.....
« Last Edit: July 08, 2017, 08:10:52 pm by MAN OF BLUES »

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Offline TimB_PA

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Re: wobble in front tire from 30-40 mph
« Reply #29 on: July 18, 2017, 12:06:43 am »
I have run well over 20 sets of ContiMotion tires. Fronts almost always go 9-10k, rears go at half that mileage.
If you're buying the ContiM tires you have to confirm the manufacturing dates. An old tire will wear out quickly and wear unusual. 42psi is the correct pressure but 40psi won't hurt it. Drop below that and it will give you issues.
I agree with the suggestion to check head bearings. Also agree it isn't a balance issue.  I have run several sets of ContiMotion tires without balancing them at all. They're pretty true. My best guess is you got some old stock.

Offline gpd323

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Re: wobble in front tire from 30-40 mph
« Reply #30 on: July 25, 2017, 01:02:04 pm »
I just installed new Pirelli GT's for an upcoming trip. My last 3 sets have been the Avon 3DXM's and a pronounced head shake as I have mentioned. I also said I doubted it was the stem bearings because prior to the Avon's I never had a shake. Well guess what?

The new set of Angel GT's have a head shake also, about 1/2 of what the Avon's produce buts its there for sure. Same speed range and all. 2013 C14

You are correct, it has to be a the stem bearings.  :beerchug: :beerchug:
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Ride while you can.