lightweight

I came across these in the Dennis Kirk catalog and elsewhere: http://www.rockymountainatvmc.com/produ ... lyId=26096 One of the things I have noticed on my 570 is that on pavement, at about 45 to 50 MPH and above, the bike has a lot of vibration. I assume most of this is coming from the front...

I found an article in my files from a July '96 Dirt Bike Mag about a 501 Berg that Theirry Karouby built down to 202 lbs. Is there any additional information on this bike online? Thanks, Swiss