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Discussion Starter #1
Ok, 2 days ago I lofted a nice long ass
wheelie.. Cruizin along yada yada started
to drift to the side of the road so I had to
cut it short. Well I didn't do a great job
of landing smoothly which is usually no
problem. I hit the ground pretty hard.

Ever since then I am getting a shake in the
through the head stem from about 100 to 110
and then it goes away. I have tightened the
head stock up, it seems fine. I really think
I waffled the tire in some manner but I have
never expirienced this before... the tire
only has about 500 miles on it. If you have
had this happen... talk to me! Thanks!

Chris

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It's nice to have one of the biggest...

[This message has been edited by chris_y2k_r1 (edited June 22, 2000).]
 

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Four possibilities, in order:

1) Ya crunched your headset bearings. Very bad. Even worse would be some damage to the steerer tube (if mobikes have 'em.)
2) Ya dented your rim.
3) Ya tweaked your forks.
4) Ya mushed the tire. This is easiest to check. Mount a different tire. If the problem goes away, tire is cause. If not, you have a headstart on picking up your next front tire. :)
5) Ya went through a ectoscropic high-velocity discombobulation zone. Only a thorough ritual cleansing, perhaps with an exorcism thrown in, will eliminate the problem.

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"It came to pass..."
 

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Discussion Starter #3
I appreciate the response and all of those
things have crossed my mind, except ofcourse
for the last, I didn't think of that, thanks.

I'm hoping someone has had a similiar
expirience and can shed some light... What
can happen to a tire that would cos this?
Could I have knocked it out of balance
some how.. The weights are still there??

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I would FIRST try a rebalancing...If that doesn't help, It sounds like a bearing/bushing problem...I can't see the forks causing a vibe like that...If they were hosed, it would shake ALL the time, I believe..Good Luck, Chris!!...And when you find out, PLEEEEEEAAAAAAASE let us know!!!You got me thinkin pretty hard on this one...Jimmy G

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chris,
get your wheel X-rayed!!!! cant trust those wheels too much these days, huh? :)
hopefully its not too much but better safe than sorry.....

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arif
'99 F4
 

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Hey Chris, I would say in all probability seems like you did some damage or at least forceful adjustment to your head bearings or related parts. You may want to take a weekend and pull the forks/triple clamp and go through the bearings. Also another possibility is not bending, but knocking your forks out of alignment. Check the fork tube hieghts ABOVE the triple clamp. MAKE SURE they are EXACTLY the same.

Also, a way to quickly "set" the forks once the heights are adjusted is to have someone sit on the bike (for stability) and you stand in front facing bike with both legs tight on eitherside of front tire, holding tire in place as you grab both handlebars. Abruptly steer back and forth. This, reportedly can "set up" the fork/axle alignment on bikes that are not set.

Whatever the cause DO let us know what you find!!! And how about some video of some of your one-wheeled adventures. (seriously)

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Fear Green.
 

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Chris, here's my bet - when you landed, you twisted your forks in their clamps. Try loosening the bolts which support your fork, all the bolts on one leg at a time, with the front wheel on the ground, and facing straight ahead. Twith the tubes a little with your hand, and then retighten, and do the other leg. I hope this works, something similar happened to me about 15 years ago. If not, at least it was free!! Good luck.

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HA HA! That's EXACTLY what I was going to say!

(Except the part about buying a Honda... :D)

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I'm not joking. And don't call me Shirley.
 

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Discussion Starter #9
Thanks guys, well first order of business
is rebalance the tire.. I have taken the top
portion of the triple tree apart and it seems
fine... I guess I keep coming back to the
tire because as Jimmy said if it was a
mechanical problem with forks or bearings it
would just get worse with speed. (Well again
that's what I believe to be true) However
Leon, what you said makes a great deal of
sense too.. I mean when you land a harsh
one at 100 mhp plus... that's some force man
some real force... Thanks and any more info;
my ears are open!!

Here's what I've got so far.

Rim = Not bent.
Headstem Bearing tight, no play.
No physical damage on tire visual.
Forks level in triple tree.
Chris= Pissed off.

Greatly appreciate the help.
Chris

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It's nice to have one of the biggest...

[This message has been edited by chris_y2k_r1 (edited June 23, 2000).]
 

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Chris - I have a few suggestions.
1. Buy a Honda.
2. Learn how to wheelie.
3. Stop going 110mph in a 35mph zone.
4. Consult your local Yamahealer.
5. Throw it in the gutter and go buy another.
6. Buy 3 sets of new tires for the coming weeks squidivity.
7. Stay well behind me when we ride. I saw you almost run that one off the road. If you wre behind me like you should have been this would never have happened.
8. Drive your car to NJ.
9. Buy a Honda.
10. Borrow B Scotts Digi Vid Cam so we can get some of this action posted.
Oh yeah - get a Honda.
:D :D :D :D :D :D :D :D :D :D :D :D :D :D

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Ride Fast. Take Chances.
 

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<BLOCKQUOTE><font size="1" face="Aril, Helvetica, sans-serif">quote:</font><HR>Originally posted by cbr600f4gd:
Chris - I have a few suggestions.
1. Buy a Honda.
...
9. Buy a Honda.
...
Oh yeah - get a Honda.
<HR></BLOCKQUOTE>

Its rare that someone makes a typo THREE times in a row!!! :D

what f4gd MEANT to say, was
Buy a NINJA, (honda/ninja, theyare both 2 syllables, easy to mix up names)

:D :D :D


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Fear Green.
 

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Just because it doesn't shake at all speeds doesn't mean that it is not the forks or the bearing. Any kind of imperfection can be amplified more at certain frequencies of vibration, so don't rule those out.

I had a slightly bent fork and steering head on my R6 that caused a vibration only when braking from high speeds, like 100+. Lower speeds did not cause the problem. After I had the fork and frame straightened, it was fine.

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Discussion Starter #13
<BLOCKQUOTE><font size="1" face="Aril, Helvetica, sans-serif">quote:</font><HR>Originally posted by cbr600f4gd:
Chris - I have a few suggestions.
1. Buy a Honda.
2. Learn how to wheelie.
3. Stop going 110mph in a 35mph zone.
4. Consult your local Yamahealer.
5. Throw it in the gutter and go buy another.
6. Buy 3 sets of new tires for the coming weeks squidivity.
7. Stay well behind me when we ride. I saw you almost run that one off the road. If you wre behind me like you should have been this would never have happened.
8. Drive your car to NJ.
9. Buy a Honda.
10. Borrow B Scotts Digi Vid Cam so we can get some of this action posted.
Oh yeah - get a Honda.
:D :D :D :D :D :D :D :D :D :D :D :D :D :D

<HR></BLOCKQUOTE>

My Analysis

#1 - "Buy a Honda" Geoff, I LIKE looking at
my bike, it's one of the Yamaha benefits.
#2 - Can YOU teach me? :rolleyes:
#3 - Umm - How did YOU know how fast I was
going without a radar gun eh?
#4 - Monday
#5 - Next Year
#6 - On Order
#7 - Your too slow
#8 - It won't make it
#9 - I don't like orange
#10 - AZ I'll post my address at the end of
this message!

Hehe



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That's B Scott, not AZ Scott dipshit. No wonder your Yamidog has problems. Your supposed to put Fork oil in the forks not motor oil. I'll give your illiterate ass a break this time. :D

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Discussion Starter #16
Geoff - I tried to get B Scott's camera once
before - I got the same thing from him as I
do with you when I'm trying to have a
quality conversation - A bunch of crap! :D

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What's with these Yamahas? They're like Ford F150s... they break all of the time but people still buy them. Go figure. ;)

The threads in the Yamaha section of this forum has nothing but stuff about "how do I fix this; my R1/R6 broke this, leaked this, burns this. :rolleyes: Judging by the Yamaha threads... Ducatis are not the least reliable anymore(that's sportbikes, everyone knows that the Harleys are still least reliable). :p :D :p

It's nice to own a Honda. My biggest problem is how to mount the white basket on the front and the tassles on the clip-ons. :D

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Ride Hard!

John
 

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Discussion Starter #18
Jon - Go away....


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<BLOCKQUOTE><font size="1" face="Aril, Helvetica, sans-serif">quote:</font><HR>Originally posted by RCjohn:
and the tassles on the clip-ons. :D

<HR></BLOCKQUOTE>

I thought tassles were glued on? Oh, wait, that's not the same kinda tassles. Sorry.



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Pete
-Men are from earth. Women are from earth. Deal with it.
 

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And I thought that I was the ONLY person who
thought that tassles were for sissies...My neighbor's boyfriend (lawnboy, has some kind of cruiser type two wheeled motorvehicle, and he has those tassle things on the handlebars.
The first time I saw them, I laughed SO HARD, that they won't speak to me anymore...I guess he was offended. ;)..True story!!Jimmy G

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