We put a CBR 900RR street bike engine in a shopping kart... Get your $5 off $25 coupon from O’Reilly Auto Parts here: http://mo-pro.co/yIg1Lb Shopping kart go karts are so cool looking but never have enough horse power so we decided to change that forever. We built a custom frame using go kart parts and two powered axles. 4x6 go kart? This crotch rocket go kart is intense! Shop Grind Hard https://www.grindhardplumbingco.com/ [email protected] PO BOX 2370 Sandpoint ID 83864