I'm not surprised. I once put a local hotshot on my 81 YZ 465 H at a Heaven meet at Clarence to ride in practice. When he came back in I asked what he thought. He said " How good is that thing. The only thing is the rear brake fades too quick ( he tells me that they are taught to ride the rear brake non stop to control wheel spin and to stabilize the rear of the bike ) He says he would easily win his own club round against the moderns on it. His lap times , according to my watch were the same as his current ride, a KTM factory supported 350 4T