Bad headshake at higher speed?


8 replies to this topic
  • CO_Rider

Posted October 13, 2008 - 08:31 AM

#1

Any ideas on what could cause headshake all the sudden? I had the bike parked for about 3 months or so. I took it out the other day and as soon as I got up into 4th and 5th it started in with a violent headshake. I mean nerve wracking bad. It only does it in softer stuff. On road and hard pack it is fine. I never had this problem before I parked the bike and have not changed anything as far as suspension goes.

  • marty72

Posted October 13, 2008 - 04:52 PM

#2

Take a quick look at the steering head nut, if it loosen up it can cause bad head shake in certain conditions. While you at it, check to see if the steering head dampens out after an input. With the bike on the stand, gently push the bars to rotate the steering head, if it keeps going to the stop, it's too loose.

I've had this happen several times to me over the years, it happens gradually but isn't always noticed until it's bad. If that's the case, set it and loctite the top nut. Hope it's that simple.

  • CO_Rider

Posted October 30, 2008 - 12:01 AM

#3

Thanks for the tip Marty. I checked the head nut and it was tight. When you say check the dampening on the stand, you mean I should just lightly push the bars one way or the other and it should not freely (easily) go until it hits the stops? I haven't checked that, but if it does what would that tell me? Maybe bearing?

  • yamaha542

Posted October 30, 2008 - 12:06 AM

#4

YZ450 and head shake go hand and hand, get a dampener if its too bad. The best solution iv found is lean back and PIN IT!

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • CO_Rider

Posted October 30, 2008 - 08:57 AM

#5

I like that solution :lol: and that was what I was trying but it doesnt really help. As soon as I am in 4th and 5th wide open the bike gets really nervous. Its just weird because all the sudden its really bad. Before there was some but nothing like it is now and like I said it just happened all the sudden after I had it parked for a while. I might just start playing around with the suspension and see if it helps out at all.

  • intensem1rider

Posted October 30, 2008 - 09:12 AM

#6

I get head shake when I go a click or 2 in on my compression on my front suspension and don't slow down my rebound to compensate, you may just need to slow down your rebound a click or 2. Have you relieved the pressure in your front suspension lately?

  • CO_Rider

Posted October 30, 2008 - 09:18 AM

#7

Sounds good. I will try messing with it and see what happens. No I have never relieved the pressure :lol: Do you just do that thru those bleeders? Honestly I really don't know anything about suspension except for the real basics..

  • grayracer513

Posted October 30, 2008 - 11:14 AM

#8

What you might try, since you say this occurred after a period of non-use, it to inflate the front tire to about 60 psi and park it in the sun on a stand, or off the bike, for a couple of days. The tire may have "taken a set". If it was on a stand the whole time it sat, this probably won't help.

  • rooster wrooster

Posted October 30, 2008 - 03:42 PM

#9

It could be your front wheel bearings going bad. Thats what mine did. Couldn't really notice it going slow but the faster you go the worse it gets.





Related Content

Forums
Photo

Should I buy this bike? help....... by Numsa Hul


Dirt Bike   General Dirt Bike Forums   What bike should I buy?
  • * * * * *
  • 10 replies
Forums
Photo

Megabomb Fitment by 288yz450


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 1 reply
Forums
Photo

James Stewart back on a YZ450F by YamaLink


Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  47 replies
Forums
Photo

Chubby dad, looking at bikes , First trip to the orange/black forum ! by Slow_ride


Dirt Bike   Make / Model Specific   KTM   250-530 EXC/MXC/SXC/XC-W/XCR-W (4-Strokes)
  • Hot  28 replies
Reviews

Yamaha YZ450F 2017 by Chris.GVS


Yamaha YZ450F 2017
  • * * * * *
  • 1 review
  • Last review by Tommyk_55
  • On Yesterday, 06:20 PM
 
x

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.