The hills of Glen Helen were alive with the sweet, uninterrupted sound of two stroke motocross bikes June 27th as the first annual Pro Circuit Two Stroke World Championships kicked off.A strong field of "non-thumpers" from many different eras created a visual evolution of the two stroke species. Early Husqvarna's, Maicos and CZ's lead the charge in the old bike classes while the latest offerings from Japan dominated the modern divisions of this first ever event.Tony Schuler, Gilbert Valdez and Rick Daniel were three of the newly crowned World Champions in the Expert 125, 250 and 500 classes, respectively. Crowd favorite and youngest Two Stroke World Champion of the day was no doubt Ian Marshall, aboard his potent KTM 50. Marshall and his mini conquered the long climb and steep descent of Mt. St. Helen's every lap without fail or fear, and in doing so won over a legion of cheering fans.Two stroke lovers were also given a pleasant surprise with the first public viewing of the radically new 2005 aluminum-framed Yamaha YZ125 and YZ250 by Yamaha. These new machines could very well mark a come back for those who like their motocrossers to be of the "cam-less" variety.