Hello Ken, I have been running a CorsaKart CH14 – made by Haase for about 4 or 5 years now. I am 6’2″ and about 215 pounds. Of course I am using a Ribtect carbon fiber seat……and this chassis is always FAST. I have won races with this chassis at the Florida Winter Tour in Rotax Masters on Mojo tires…….and have won races in SKUSA with a Rok tt and MG tires. Great chassis for heavier drivers!!