Well I thought I would post up my build (I don't want to be called a "lurker").It started as a 1993 Ezgo marathon.I went the briggs route and got the bike motor bug after riding in rifters grey cart.I managed to procure a 2003 Kawasaki ZZR-600 parts bike and the madness began.I wanted to have reverse and didn't want to try to use a golf cart rear axle because I didn't know at the time if it would hold up.I got an idea from a mini sand rail site for using a Honda prelude tranny for a rear diff.So after all the fabbing,scratching my head and redoing half of what I had already done,this is where I am at.I will be shifting the bike motor and using the rear car tranny as a "selectable gear rear axle".It will not get shifted while moving.So much more to explain.... not enough time.