DS 450 X mx

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.

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.

R-Type cast aluminum swingarm rear suspension

Features Chromoly hollow rear axle, extended-reach aluminum wheel hubs, aluminum sprocket, cast-aluminum swingarm. For the lowest possible unsprung weight and the most mass centralization.

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.

Race-inspired radiator grill

Race-inspired radiator grill (MC)

31.5-in. (800 mm) seat height

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

7-in. (179 mm) factory-set ride height (175-lb rider)

Straight from the factory, the DS 450 X mx is prepped with a ride height of seven inches (178 mm). This height, along with the ATV being “dialed in” for a 175-pound rider (with gear), gives the DS 450 X mx a lower center of gravity and allows you to rail through the corners with confidence.

Black aluminum ITP 10x5 T-9 GP front wheels

Black aluminum ITP 8x8 T-9 Trac-lock rear wheels

FOX PODIUM∞ X Remote rear shock

FOX PODIUM X Remote rear shock with dual speed compression, rebound and preload adjustments and 11.1 inch (282 mm) of travel

Adjustable-width hollow rear axle from 46 in. [1.17 m] to 50 in. [1.27 m] by increments of 0.5 in. [12.7 mm] per spacer

Many of top motocross pros are choosing to race with a rear width that is slightly narrower than the front-end width. This is possible with the DS 450 X mx Chromoly 4140 adjustable-width hollow axle. Adjustment from 46 (1,168 mm) to 50 inches (1,270 mm) is possible with 0.5-inch (13 mm) spacers.

FOX∞ FLOAT∞ X EVOL∞ front shocks

FOX FLOAT X EVOL front shocks with dual-speed compression and infinitely adjustable air spring and 10.7 inch (272 mm) of travel

20x6-10 ITP QuadCross MX PRO front tires

High-Industry-leading performance ITP QuadCross MX Pro tires give maximized traction on track surfaces, especially for blue-grooved. Up front, 20-inch (508 mm) ITP QuadCross MX Pro tires mounted on 10-inch (254 mm) black, aluminum ITP T-9 wheels

Aluminum front bumper, number plate ready

Aluminum front bumper, number plate ready

Double A-arms with adjustable caster

+ 2-inch double A-arms with adjustable caster and camber give a 50-inch front stance

Extra-strength extended 1-in. (25.4 mm) steering stem with anti-vibe mounts

A +1-inch (25 mm) extra-strength steering stem with anti-vibe mounts comes standard on the DS 450 X xc and the DS 450 X mx. This gives the racer a better feel for the ATV while in an attacking stance out on the course. There is no need to buy an aftermarket stem to be competitive. Mounted to the steering stem is an aluminum 6061-T6 taper-profile handlebar with square racing pad.