I'm getting a dangerous amount of headshake when I take my hands off the bars and the engine compression brakes. Tires are 1 year old and were installed by Burnaby Kawasaki, they're Avon Road Riders and are brand new, no wear. The bike sat for 6 months on the centre stand, so I assume on the front tire. The tire was inflated to around 22PSI but they're now at factory spec. The rotors don't seem to be warped as braking is smooth and without vibration. The steering is decent, I put the bike on it's centre stand and didn't get any noticeable freeplay on the front wheel and it's free of detents. The bike tracks very nicely when my hands are on the bars. I don't know what it could be, help? If I keep my hands off I assume I would eventually crash as the head shake gets worse and worse.