Will a Honda rancher 350 rear axle work on a Honda 450 foreman?

No, a Honda Rancher 350 rear axle will not work on a Honda 450 Foreman. The two models have different specifications, dimensions, and designs, which means their axles are not interchangeable. If you're looking to replace the rear axle on a Foreman, it's best to use parts specifically designed for that model. Always consult the owner's manual or a parts specialist for compatibility.