I stumbled upon this Monster today... 124" Turbo-charged Dyna.. Apparently, this thing blew apart a spoke wheel that was rated to 200mph. The guy was out on a shake down run on the cast Electra Glide replacement. I heard at 2lbs. of boost it's pretty tough to hang on... I can't even imagine it at 5-6lbs. of boost. It'll be at the Mojave Mile this weekend. This thing holds a couple of Land Speed Records, check out: http://raycwheeler.com/ for more info.