front end really unstable

AZkfx450rider · #11 (**permalink**) 07-05-2009, 11:12 PM

my fronts are stockers and im running on lose az dirt mostly, but sum sandy washes, but it has seemed to get progressively worse with the twitchy, i used to only feel it on the road but now i notice it while riding in the dirt the thing tracks all over

Duster · #12 (**permalink**) 07-06-2009, 12:38 AM

Sounds like you have a toe issue... toed out and wearing on the inside and twitchy at speed.

The other thing that could cause inner tire wear would be running too low in the travel on the front suspension. I don't know how much the KFX's angles are affected by where it is at in the travel, but I guess it's possible. Have you checked your ride height at the pegs and at the rear of the A-arms when you are on the quad?

AZkfx450rider · #13 (**permalink**) 07-06-2009, 12:48 AM

now that u mention it i have played with the shocks recently, not sure wtf i changed on them or how to measure anything haah!

Duster · #14 (**permalink**) 07-06-2009, 02:13 AM

Quote: Originally Posted by AZkfx450rider

now that u mention it i have played with the shocks recently, not sure wtf i changed on them or how to measure anything haah!

You will need a helper who can read a ruler well or some good eyes and a folding wood ruler. An old pizza box or 2 pieces of cardboard help too.

Find a nice level spot.
Lay the pieces of cardboard in front of the front tires.
Drive onto the cardboard.
Stay on the quad, and bounce all around and turn the bars back and forth.
This will allow the front suspension to settle to a true ride position easily.

Now, measure up to the bottom of the frame right in front of the pegs.
Write that measurement down or remember it well.

Then measure up to the bottom of the frame up towards the A-arms.
I think I measured right at the last point there before the frame angles up.

Your measurement should be at least 1/4" inch higher in the front.
If not your frame rake is off and so is the balance on the suspension loading.

Report back your measurements so we can see where you are at.

I weigh about 200 lbs.
I "THINK" my measurements were 7 1/4" and 7 1/2" or 7 3/4"...

But I run a lot of race sag to stay low and use as much of the progressive rate of the springs as possible... which required me to move up to a 22" front tire to avoid cranking down on the front springs to raise the front.

Since you put Razr2 rears on... I bet you are now running high in the rear. The Razr2 usually runs a little tall they say... and then you have only a 21" front.