Engine
Type 421cc, 4-stroke, liquid-cooled single; SOHC

Bore x Stroke 84.5mm x 75.0mm

Compression Ratio 10.0:1

Carburetion Mikuni 33mm BSR

Ignition DC-CDI

Starting System Electric w/auxiliary pull

Transmission Yamaha Ultramatic® V-belt with all-wheel engine braking/H, L, N, R, P

Engine Braking All wheel

Drive Train Yamaha On-Command® pushbutton; 3-way locking differential; 2WD, 4WD, locked 4WD; shaft drive


Chassis
Suspension/Front Independent double wishbone; 5-way preload adjustment, 6.3-in travel

Suspension/Rear Independent double wishbone; 5-way preload adjustment, 7.1-in travel

Brakes/Front Dual hydraulic discs

Brakes/Rear Sealed wet brake

Tires/Front AT25x8-12

Tires/Rear AT25x10-12


Dimensions
Length 78.5 x 43.0 x 44.1 in

Seat Height 32.7 in

Wheelbase 48.5 in

Turning Radius 118 in

Ground Clearance 10.8 in

Fuel Capacity 4.0 gal

Dry Weight 593 lb

Rack Capacity 88 lb Fr./176 lb Rr.

Towing Capacity 1,102 lb w/2 in reciever hitch


Other
Instrumentation Digital LCD multifunction display: speedometer, odometer, dual tripmeter, hourmeter, clock, gear position

Lighting Dual 30W Krypton multi-reflector headlights & 21W/5W brakelight

Valve Clearance for the 450's


Valve clearance (cold):
Intake:
0.06 ~ 0.10 mm
(0.0024 ~ 0.0039 in)
Exhaust:
0.16 ~ 0.20 mm
(0.0063 ~ 0.0079 in)