DS 450

45.3-hp Rotax 4-TEC 449cc, liquid-cooled, single-cylinder 4-stroke engine

The DS 450 is equipped with a 449 cc 4-stroke EFI Rotax engine, offers the largest bore (97 mm) and the largest intake valves (38 mm) from the DOHC 4-valve head with 97 x 60.8 mm bore and stroke. The EFI uses the largest throttle body (46 mm), 16-bit CPU with 32-MHz clock speed and an almost straight intake path. With a concept referred to as ''Durchzugskraft'' or flow dynamics optimization, the engine breathes easily and can produce more power. The DS 450 delivers the best power-to-weight ratio.

520 O-ring chain

Heavy-duty, race-ready O-ring chain can handle high stress of racing.

Hollow rear axle

The hollow, high-strenght steel axle has been shortened by extending the lenght of aluminum hubs. The final design: a shorter axle mated with "spyder" all-aluminum hubs with precision machined splines and longer arms. The rear unsprung weight of the DS 450 is therefore reduced, which also has a significant impact on mass centralization and dry weight.

R-Type cast aluminum swingarm rear suspension

Features Chromoly hollow rear axle, extended-reach aluminum wheel hubs, aluminum sprocket, cast-aluminum swingarm, 10.5 in. (267 mm) of travel. For the lowest possible unsprung weight and the most mass centralization.

Polished aluminum Wheels

Shortened spindle

The spindle acts as a lever on the steering ball joints. The longer the lever, the more the kickback is transmitted to the steering when the wheel hits an obstacle. The DS 450 short spindle lever reduces negative steering feedback, providing a more confidence-inspiring ride.

R-Type forged aluminum double A-arm front suspension

Longest aluminum upper and lower A-arms for a 46-inch sport ATV, one-piece aluminum knuckle and a short spindle.

Inverted brake calipers

Inverted twin-piston front brake calipers offer impressive stopping power because of the larger brake discs (182 mm). By putting the caliper "inside" a peripheral brake disc, the diameter can be increased as close as possible to the inside of the wheel. This set-up allows for larger brake discs and improved stopping power and feel. Plus, the peripheral disc brake leaves room inside to push the lower A-arm ball-joint deep inside the wheel.

No weld, ALTEC twin pyramidal aluminum frame

A maximum strength, no-weld, all-aluminum frame that uses a twin pyramidal structure. Major components are firmly secured with aluminum fasteners called lock-bolts. The frame is stronger yet much lighter than a traditional ladder frame.

Race-inspired radiator grill

33-in. seat height

Low seat height provides a lower center of gravity and race-ready positioning for aggressive riding.