As far as I know this ride on is a MTD.

I have one out the back garden with the 3 bolt pattern for the rear wheels,I bolted up quad bike wheels
to the back axle. My ride on just has forward and reverse gears with a 8hp engine.

Norm the rear axle has a sprocket all you do is remove the gearbox and connect the chain from the
bike engine to the rear sprocket..Probably best to remove the diff spin it 180 degrees so the sprocket
is on the same side as the bike engine.