The rear axle is made from 4140 chromoly, while the hub, drive pinion and rear disc are made of aluminum. Again, the result is the lowest unsprung weight and the most centralized mass possible.

The pièce de résistance
The engine is without a doubt the most unique of all the DS450's components. For its design, Rotax engineers developed a process called Durchzugskraft, which means "high-flow dynamics". The goal is to systematically reduce the obstacles that hinder the air flow and the air/fuel mixture in order to improve engine efficiency and throttle response.


This 449-cc engine is fed by an electronic fuel injection (EFI) system with 46-mm throttle body. Other features include a 4-valve cylinder head, two spark plugs, Nimonic alloy valves and electrically coated Nicacil cylinders (to reduce friction and extend the engine's life expectancy). Lubrication is performed by a dry sump system with an external oil tank, which allows for improved engine speed increases. Power is sent to the rear wheels by way of a 5-speed transmission and a heavy-duty clutch using nine rubbing plates and the famous Rotax-designed DirectLink mechanism.

All in all, BRP engineers have done excellent work. Their outstanding efforts have resulted in a highly advanced and ultra-performing ATV. The Can-Am DS450 EFI is definitely a strong contender for the title of "Best Sport ATV of 2008".


Photo Credit : Can-Am