My 2006 YFZ450 quad has real squirly steering. It has IMS rear paddles and a single razor Kendal front razor tires. I have never riden it anywhere other than sand. I have tried:
-checked alignment and had it aligned.
-check air pressure tires.
-installed Scott's steering damper (even adjusted it all the way till steering was hard)
-adjusted front to toe in 1" so the front of the tires were adjusted in 1" more than the back.
-adjusted handlebars that were "bro'ed out" to an inline position with the steering shaft.

And it still is all squirly. It just is not stable and will not track straight smoothly at especially high speeds. It acts like the slightest bump or turn will send it right or left radically.

The only things I can think of from here is to try and run the nobby tires on front, as I suspect the single razor Kendal tires are too grabby with a single razor, or go to a double razor IMS front tire.

Does anyone know if this is a problem inherent with the Yamaha or have any suggestions?

Reed 619-954-8416  

I've been told by many people to run the double razors for control. I ride a YFZ as well and I'm actually trying to figure out what to run on the front, so I'm glad you posted this. Now I'm leaning twords the double razors.