Hey Folks I'm wondering if anyone has had any experience with the Boy GF centrifugal clutch system?? The ones on the old Honda Oddsey(sp?) worked real well. He has a center mount 4stroke and a 2stroke with the system on them. I really want a center mount four and it seems that no one has one with a workable transmission. I hope to build my first motorized bicycle this fall/winter. Can you get snow tires for bicycles?