De Xing Motor Pte Ltd

It all started with the incredible YZ400F. Then came the equally groundbreaking YZ426F. Could there possibly be a more storied four-stroke lineage than this?

Introducing the all-new, all-powerful, all-light YZ450F.

We've forged a totally new machine from the Dunlops up. With features like an all-new, liquid-cooled, 5-titanium valved 449cc single, with a completely redesigned automatic decompression system for easy-starting. An all-new 4-speed transmission and a beefed up clutch with larger, stronger plates.

Lighter weight frame and swingarm. Completely revised suspension, stronger brakes and more aggressive ergos and styling. And its incredible weight loss makes it harder-hitting and sharper handling than ever.

Winner of Motocross Action's "Four-Stroke Shoot-Out" six straight years.**

Arguably one of the greatest milestones in MX history.

More Features

Specifications
Engine
Type	449cc, liquid-cooled, 5-valve, DOHC, 4-stroke w/titanium valves
Bore x Stroke	95 x 63.4mm
Compression Ratio	12.5:1
Carburetion	39mm Keihin FCR flat-slide w/throttle position sensor
Ignition	Digital CDI
Transmission	4-speed w/multi-plate wet clutch
Final Drive	#520 Chain
Chassis
Suspension/Front	46mm Kayaba inverted telescopic fork w/adjustable compression and rebound damping; 11.8" travel
Suspension/Rear	Fully adjustable Kayaba single shock, 12.4" travel; separate hi/lo speed compression adjustment
Brakes/Front	250mm Floating Disc
Brakes/Rear	245mm Disc
Tires/Front	80/100-21 Dunlop
Tires/Rear	110/90-19 Dunlop
Dimensions
Length	85.5"
Width	32.6"
Height	51.3"
Seat Height	39.2"
Wheelbase	58.5"
Ground Clearance	14.6"
Dry Weight	222 Lbs.
Fuel Capacity	1.8 Gallons
Other
Main Jet	#165
Main Air Jet	#200
Jet Needle	NCVQ-4
Needle Jet	(2.9mm ID)
Pilot Air Jet 1	#100
Pilot Outlet	0.9
Pilot Jet	#42
Primary Reduction Ratio	62/22 (2.818)
Secondary Reduction Ratio	48/14 (3.429)
Gear Ratio - 1st Gear	27/14 (1.929)
Gear Ratio - 2nd Gear	25/16 (1.563)
Gear Ratio - 3rd Gear	23/18 (1.278)
Gear Ratio - 4th Gear	21/20 (1.050)