I'd trade if the guy wants $600 and your DRZ, assuming you have the spare cash though.
You might want to put at least a 125 bike engine on a quad chassis. 80/85cc engines do not make much torque, which is needed for the extra weight of the quad chassis.ok tell me if this would be stupid i think the engines on the rm 80s are really fast but i wanna put it on a atv chassie