zxman
Parking Attendant
Posts: 5
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posted September 12, 2008 07:30 AM
head shake
i have an 06 14 that has developed a bad head shake when you remve your hands from bars while coasting in gear. the steering head was tightened. the only change to the bike is a new set of dunlops. any input will help...
  
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butterthegreat
Expert Class
Posts: 329
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posted September 12, 2008 07:34 AM
I only have that problem when my front tire wears really bad or becomes unbalanced.
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Hurricane
Expert Class
Posts: 173
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posted September 12, 2008 08:29 AM
Tires were not balanced correctly.
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Shogun
Expert Class
Posts: 274
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posted September 12, 2008 10:20 AM
I've been fighting the same problem. Also running Dunlops???
I made a few changes at the same time (lowered, Marchesini wheels, tires) and have chased the problem ever since. The shop double checked the balance and it looked OK. I even added a GTR steering stabilizer but still have the same issue you describe.
Weird?? Good luck on finding a solution.
____________
06 ZX14 - Arata exhaust, PC III, McIntosh Ext swingarm, Vortex lowering links, Racetech rear shock, Marc wheels, To be continued...
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sweetfa65
Expert Class
Posts: 110
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posted September 12, 2008 04:12 PM
I had a ZX11 which did the same on Dunflops. I put a new set of tires on and it was like a brand new bike.
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'2013' SE Spark Black & Golden Blazed Green ZX14R. Bog stock after trading my 07 ZX14.
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bigbore4
Zone Head
Posts: 806
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posted September 12, 2008 06:15 PM
What you are describing is a "wobble", not head shake.
You say "coasting in gear", what speed?
It's possible you have a bad tire, just go swap it with another one, preferably a BT002 Racing or Racing Street, see what happens.
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zxman
Parking Attendant
Posts: 5
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posted September 13, 2008 06:17 AM
thanks all for the input. my mechanic wanted to sell me a steering stabilizer but i would much rather correct the problem. after reading all comments i'm going to look at the front tire. before the dunlops the stock tires worked fine without the "wobble".To respond to bigbore4, the wobble would occur at 40 to 50mph.
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bigdtd
Needs a job
Interceptors
Posts: 4209
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posted September 13, 2008 08:26 AM
get some pilot powers the bike will be so stable you'll flip
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2006 Black ZX-14,6 inches over,16/42, flies out,BMC Street Filter,Brock's Street Meg,Brock's Radial Mount Strap,PClll with Race map,Dynojet LCD w/Techmount, ZX-14 fender eliminator,Pilot Power2CTs,Speedohealer,Pazzo Levers,Cox Radiator Guard, Garmin Nuvi 265WT
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bigbore4
Zone Head
Posts: 806
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posted September 13, 2008 09:07 AM
Honestly, I would try a set of BT002 bstones, Racing on the front and racing street on the rear. Absolutely the best tires I have ever used. Not as good in the wet as the 014's, but on dry asphalt, nothing better.
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Hawkman
Zone Head
Posts: 747
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posted September 13, 2008 11:52 AM
I don't like Dunlops. Only time I had a serious tankslapper was with Dunlops. Put Dunlop back on a couple tires later and the tendency to tank slap came back. I never put Dunslops on again. Fuck 'em.
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scated
Parking Attendant
Posts: 29
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posted September 13, 2008 04:12 PM
I"ve had the same sensation with an'08 with a stock BT-014 on th front with 3200 miles on it.
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MJ
Zone Head
Posts: 560
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posted September 14, 2008 01:28 AM
quote:
I"ve had the same sensation with an'08 with a stock BT-014 on th front with 3200 miles on it.
At 3200 miles your BT-014 front was shot. Just because a front tire still has tread don't mean its still good. 14's are hell on front tires  ...and BT-014's don't last too long 
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NeverKnow
Novice Class
Posts: 79
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posted September 14, 2008 03:49 AM
 Edited By: NeverKnow on 14 Sep 2008 04:59
Out of balance, is:
Rotation arrow correct
Does balance dot match value stem, will tell you about mechanic's quality level
Is rim bent, how many oz. of weight were used
tire pressure correct
Buy a balancer and check balance yourself to verify what you are being told is true.
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bigbore4
Zone Head
Posts: 806
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posted September 14, 2008 06:47 PM
"Buy a balancer and check balance yourself to verify what you are being told is true."
That is funny.
For the guys that don't know, with the tire and wheel technology today, they are usually so stinkin close it's not funny. Many of the better tires you get, will not even have a mark because they are for all intents and purpose,, "Neutral".
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bigbore4
Zone Head
Posts: 806
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posted September 14, 2008 06:49 PM
You find a decent tire that works for you and your bike, stick with it, and when it starts to feel funny, chuck it and go buy a new one.
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lietoome
Needs a job
Posts: 2033
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posted September 14, 2008 07:30 PM
3200 miles on the front tire? Its Done, get a new set.
Bigbore---I'm sure the majority of new tires are close to neutral, but I've seen New expensive tires that are a LONG way from neutral.
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NeverKnow
Novice Class
Posts: 79
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posted September 15, 2008 03:18 PM
That is funny.
Wasn't meant to be funny. The $100 spent on a balancer is a worthwhile investment. Bought a No Mar tire changer and Marc Parnes balancer last year. 3 tire changes at this point without any issues.
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davej
Expert Class
Posts: 451
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posted September 15, 2008 04:32 PM
I suspect that hard braking can damage an otherwise perfectly good tire. My second BT-014 front was less worn than the first with only 2,000 miles on it when it developed head shake. I made some pretty hard stops with the second tire and it failed soon. New Michelin front and rear solved the head shake. Have to ask myself what am i doing to the front tire subjecting it to more force than the rear when you shove 700lbs of machine and rider into a hard decell from 150mph +.
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Triumph guy
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bigbore4
Zone Head
Posts: 806
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posted September 15, 2008 05:49 PM
"Have to ask myself what am i doing to the front tire subjecting it to more force than the rear when you shove 700lbs of machine and rider into a hard decell from 150mph +. "
About the same as having an Elephant stand on your head 
Front suspension config and settings will definetly help or hinder tire wear.
I used the Pilot power's on my 12, on some twisty roads and killed the front in just a bit more than the rear. I went to 014's, much better, especially in the wet.
Recently been using the 002 Racing front and Racing Street rear, good luck with the front, so far.
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