My ice bike is a 80 GN400 (yeah, I know this is the 2-strokes forum) that has been converted to look like a flattrack bike. I have always wondered if the twin shock aluminum swingarm of the PE series would fit into the frame on the GN400. That would give me a lighter rear end and longer wheelbase. Plus it'd be a cool adaptation to the ol' GN. Anybody know the width of the aluminum swingarm at the front pivot on the PE series?