head shakes - Kawasaki ZX-10R.net
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post #1 of 54 Old 06-07-2015, 03:48 PM Thread Starter
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head shakes

When Im accelerating hard the bike going straight is gets like shaking the head.

At first was violent, then I checked the head bearings and they where loose.
Then it is almost gone, I had to put harder the rebound on the back almost full closed and it liked it a lot, but sometimes when the street has imperfections It tends to do it.

I will receive a rebuilt damper, hope this helps.

Its a gen4.

the bike has a 5mm washer on the shock.

Any recomendations.
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post #2 of 54 Old 06-21-2015, 07:38 PM
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Steering damper. Do you have one or not properly adjusted.
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post #3 of 54 Old 06-21-2015, 07:58 PM Thread Starter
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I soldd it this way

teh head stering bearing was lose, helped a lot
maxed the rebound damping on the shock helped even more
the sag from 35mm to 30mm
by that time the bike was stable but not 100%

then I got the revalved damper and now is fenomenal
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post #4 of 54 Old 06-21-2015, 09:10 PM
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Add some preload to the shock. The spring is not supporting you and your throttle hand causing the bike to squat and lifting the front end.

Stupidity and Motivation are a dangerous combination

Velocity Calibrations
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post #5 of 54 Old 06-21-2015, 11:26 PM
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Make sure the tyres are balanced well. I had head shake that i couldn't fix with any suspension input and it was caused by my d211 front being out of balance.
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post #6 of 54 Old 06-22-2015, 07:54 AM Thread Starter
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I balanced the front and it helped also.
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post #7 of 54 Old 08-25-2015, 07:22 AM Thread Starter
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Now the shakes are way less but exist....

Think its a geometry thing.... the back is raised 5mm and the front is stock.

I tried grabing the tank with legs and it made the shakes go.

but its stange to go on 5th WOT and slowly the head feells light and starts to wobble..

Any help is apreciated.
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post #8 of 54 Old 08-25-2015, 07:40 AM
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Just curious why you raised the rear end 5mm? I'm not saying it's wrong because I raised the rear on my 600s but when you do that you are changing the rake which will cause more turn in but also reduce stability. I would take the shim back out to see what effect it has. Also put the rear of your bike on a rear stand and use a floor jack under your headers to raise the front of the bike off the ground. Pull and push on the front wheel to see if your steering stem has any play in it. Also check your tire for cupping and wheels for balance.

.

Last edited by tdh; 08-25-2015 at 07:43 AM.
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post #9 of 54 Old 08-25-2015, 07:42 PM
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Need a lot more info really... but to start at a guess.. Shock. More preload, less rebound, more comp. But alas all this could change depending on missing info.
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post #10 of 54 Old 08-25-2015, 08:57 PM Thread Starter
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Sag is at 30mm
Shock
Rebound is maxed
5mm shim
Comp is -3 from full max
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