The 42mph was with the Vegas carts 460, she handles extremely well, here is a video with me running down a gravel road with my dog sitting next to me, at the end of the video I tell her to stay in her sit because she likes to jump off and look for critters in the weeds at that intersection..
just to clear up if wondering, the G9 in the video didn't have an engine when I purchased it, but I did install a G2 engine from another cart that I originally started with..