I have a 99 venture 500 with major darting issues. I have swapped yamaha plastic skiis with steel skiis(good carbides) with no help. Do all the yamaha chassis' have poor handling? I have driven vmax's of this vintage with the same concerns. I have adjusted the front spring tension to no avail. You can ride my buddies formula with one hand at 70 mph. I wouldnt even consider that with this machine.Any recommendations?