The fatal flaw in the Honda CR80 engine is the weak third gear in the transmission. This tutorial walks you through the process of replacing the gear. next page The Honda CR80 is a terrific little motor for karting, but like all 2 cycles, to maintain peak power output maintenance must be done. next page Shifter kart racer and drag racing crew chief Kathy walks you through assembling a Yamaha YF200 kart racing engine. next page This is the poor man's alternative to the pump around system for shifter karts. next page