What is the verdict on these kits? NEW 4 CYCLE MOTOR bicycle Motorized BIKE GAS ENGINE KIT - eBay (item 190303995152 end time May-27-09 18:00:52 PDT) I want to build me an offroad bike. Are these kits any count? I know they have had some tranny problems in the past. This hobby is so addictive! Just can't stop building these bikes!