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Old 12-02-2010, 08:38 PM   #16
mfp4073 OP
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Originally Posted by mykill View Post
Lasertecs seem to be proone to cupping which can do wierd things to steering and general front end feel. 4500 miles and age could be factors. If they are crusty or you can notice highs and lows over the circumference suspect the tire.
rear tire def has a flatspot from mileage. Front looks worn, but seems to have good tread left. No cupping I can find or feel on it.
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Old 12-03-2010, 02:28 AM   #17
Bill Harris
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Went through today with another set of hands. Wiggled and shook and checked for looseness, but didnt come up with anything.
But did you adjust the steering head and swingarm bearings and check the preload on the wheel bearings?
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Old 12-03-2010, 05:51 AM   #18
Uncle Pollo
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Just remember that all bikes can head shake at times. Especially coasting down through the 45 to 35mph speed zone. I have read some claim that they can make a bike completely wobbe/head shake proof. BULL @*#$!
My bike was neutral as hell till I replaced the tires with bias ply knobby on the front and a bias ply dual sport on the rear.

Now I can make it wobble at will!!!!
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Old 12-03-2010, 08:49 AM   #19
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But did you adjust the steering head and swingarm bearings and check the preload on the wheel bearings?
No, did not have the time/parts/tools for the job. Planning on starting to throw parts and adjustments at it one section at a time.
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loner, lonegunman, get it. That’s the whole point. I like the lifestyle, the image. Look a the way I dress.
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Cavemen must've designed them shortly after inventing the wheel.
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Old 01-09-2011, 06:01 PM   #20
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Well, first thing that i did...mainly because my rear tire was worn out, was replaced my tires. Front tire looked good, plenty of tread, no cupping or unusual wear.

But after 200 miles, no more head shake.

Feeling much more secure about riding it now.

Old front tire was a lasertec, new tires are bridgestone s11 spitfires.

So jsullivans experience with having metzlers that cause this problem may be what I had too. Thanks all!
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Quote:
Originally Posted by Martin Blank
loner, lonegunman, get it. That’s the whole point. I like the lifestyle, the image. Look a the way I dress.
Quote:
Originally Posted by bgoodsoil View Post
Cavemen must've designed them shortly after inventing the wheel.
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Old 01-09-2011, 06:48 PM   #21
4ad
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with everything else being equal (sorted),,,a tight head bearing will shake at a high speed...a loose one will shake at a lower speed.



sure cure for headshake:


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Old 01-10-2011, 09:24 AM   #22
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Originally Posted by mfp4073 View Post
Well, first thing that i did...mainly because my rear tire was worn out, was replaced my tires. Front tire looked good, plenty of tread, no cupping or unusual wear.

But after 200 miles, no more head shake.

Feeling much more secure about riding it now.

Old front tire was a lasertec, new tires are bridgestone s11 spitfires.

So jsullivans experience with having metzlers that cause this problem may be what I had too. Thanks all!
Head shake can be everything or nothing. In my experience, it's usually a toss up between head bearings, wheel bearings, and tires but it can be just about anything. Sticky forks will do it too! I guarantee that your bike will still shake it's head under the right circumstances. Any bike will.

I have got a front tire on my main bike right now that causes a bit of head shake but it is worth it because of all the cupping free grip I am getting. The tire is just a tad too big IMO. I do think the bike turns in better with a smaller front tire but the tire that I run in that size cups real bad. It doesn't seem to effect grip TOO much. I am going back to that tire next time. Meanwhile, the AM26 Road Rider I have on the back makes my bike weave but nothing like having one on the front too!!! I have done back to back tests. Road Riders: BAD weave. Super Venoms: NO weave. Then I put a Road Rider just on back and SOME of the weave returned!
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