Changing Rear Axle?

[floater22]

hey, i just bought a go kart with a 4hp honda with a single wheel drive. my friend has an old lawn mower that has a perfect rear axle with nice big tires and a huge sprocket on it. would it be a good idea to buy it and put on my kart, and get my engine to power both wheels using this axle, or would a 4hp just not be enough to power both wheels. thanks a lot.

[devildog]

having 2 rear wheels instead of one rear wheel working seems better to me, but theres always problems like the weight it carries and the strength of the engine