Specifications

Engine

Vehicle Model Number Buck, Buck EX, Buck EXT

Make Rotax® 4-TEC, 4 stroke Longitudinal mount, Liquid cooled, OHV

Cylinders Single cylinder

Valve 2 valves with hydraulic lifters (no adjustment)

Displacement 498 cc (39.3 cu. in.)

Bore (Standard) 89 mm (3.5 in.)

Stroke 80 mm (3.15 in.)

Compression Ratio 9:1

Lubrication Wet sump with replaceable oil filter (lubrication of engine and transmission simultaneously)

Oil Filter Rotax®

Decompressor Automatic

Exhaust System Nelson, stainless steel, USDA Forest Service approved

Air Cleaner 2 stage foam filter

Transmission

Clutch 1 centrifugal and 1 multi-disc hydraulically controlled

Transmission Dual range (HI-LO) with park, neutral and reverse. 5 speeds. Electronically controlled hydraulic shift. Limited vehicle reverse speed.

Cooling

Type Liquid cooled

Radiator Rear mounted with thermostatic fan

Carburation

Carburetor make and type Mikuni BSR33. Constant depression type with manual choke and ECS (Enrichner Coasting System)

Choke plunger position Variable

Idle speed 1100 RPM

Fuel pump make and type Mikuni, external (vacuum-operated)

Electrical

Magneto generator make and type Denso, 400 W @6000 RPM

Ignition type IDI (Inductive Discharge Ignition)

Ignition timing Not adjustable

Engine RPM limiter 7700 RPM (any gear in forward)

Vehicle speed limiter 15 km/h (9 MPH) in reverse

Spark plug make and type B1DR8EA

Spark plug gap 0.6 to 0.7 mm (0.024 to 0.027 in.)

Number or spark plug 2

Battery 12 V, 19 Ah, Electrolyte type

Starting system Electric start and manual

Head Lamp 2 x 35 W

Taillight 5/25 W

Pilot lamp cluster LEDS, 0.7 V approx. (each)

Fuses

Location no. 1 (ignition) 15 A

Location no. 2 (accessories) 15 A (power outlet and auxiliary supply)

Location no. 3 (solenoids) 15 A

Location 4 (fan) 15 A

Location 5 (MPEM-Multi-purpose electronic module) 20 A

Location 6 (charging system) 30 A

Vehicle

Drive Train

Front differential Shaft driven/single auto-lock differential (shear pump)

Rear axle Shaft driven/solid axle

Suspension

Front Type Independent suspension - double A-arm

Front Travel 178 mm (7 in.)

Rear Type Rigid swing-arm

Rear Travel 191 mm (7.5 in.)

Tires

Size Front 25 x 8 - 12 Trailwolf

Size Rear 26 x 10 - 12 Trailwolf

Pressure Front and Rear (all except EXT) 34.5 kPa recommended; 31 kPa minimum (5 PSI); (4.5 PSI)

Pressure Front and Rear (EXT) 48 kPa recommended; 45 kPa minimum (7 PSI); (6.5 PSI)

Wheel size front 12 x 6.5

Wheel size rear 12 x 8

Wheel nut torque 75 N·m (55 lb-ft)

Brakes

Front Hydraulic - 2 discs

Rear Hydraulic - 1 disc

Parking Park through transmission LH brake lever includes a lock

Loading Capacity

Front rack 40 kg (90 lb) Includes front storage tray

Rear rack (all except EXT) 80 kg (175 lb) includes tongue load

Rear cargo box (includes tongue load) (EXT) 273 kg (600 lb)

Lateral compartment (each compartment) (EXT) 6.8 kg (15 lb)

Total vehicle load allowed (all except EXT) 220 kg (485 lb) includes driver, all other loads and added accessories

Total vehicle load allowed (EXT) 363 kg (800 lb) includes driver, all other loads and added accessories

GVWR (Gross Vehicle Weight Rating) (all except EXT) 545 kg (1200 lb)

GVWR (Gross Vehicle Weight Rating) (EXT) 750 kg (1650 lb)

Towing capacity 500 kg (1100 lb)

Tongue capacity 50 kg (110 lb) included with rear rack

Front storage tray 10 kg (22 lb) included with front rack

Dimensions

Dry mass (all except EXT) 345 kg (760 lb)

Dry mass (EXT) 386 kg (851 lb)

Overall length (Standard) 2083 mm (82 in.)

Overall length (EX) 2184 mm (86 in.)

Overall length (EXT) 2489 mm (98 in.)

Overall width 1194 mm (47 in.)

Overall height 1.1 m (45 in.)

Seat height 945 mm (37 in.)

Wheel base (all except EXT) 1296 mm (51 in.)

Wheel base (EXT) 1600 mm (61 in.)

Wheel track (front) 992 mm (39 in.)

Wheel track (rear) 940 mm (37 in.)

Turning radius (all except EXT) 2130 mm (84 in.)

Turning radius (EXT) 2515 mm (99 in.)

Toe-out adjustment (each side) (front) 8 mm (5/16 in.

Toe-out adjustment (each side) (rear) N.A.

Ground clearance (front and under engine) 244 mm (9.6 in.)

Ground clearance (rear axle) 188 mm (7.4 in.)

Liquid Types and Capacities

Liquids

Oil type (engine and transmission) (10W40 Summer) (10W30 Winter) SAE, 4-stroke mineral-based engine oil.
API classification SG, SH or SJ. Refer to OIL VISCOSITY CHART for proper grade.

Coolant Ethylene-glycol/water mix (50% coolant, 50% water). Use coolant specifically designed for aluminum engines.

Fuel type Regular unleaded gasoline

Fuel octane 87 (R + M)/2 or higher

Differential (front and rear) 75W90 or 80W90 (API GL-5)

Hydraulic brake Brake fluid, DOT 4

Propeller shaft joint grease SAE Multi-Purpose Moly Grease

Cable Lubricant Silicone Spray Lube

Suspension Grease Multi-purpose HD Lithium Complex Grease

Brake Fluid DOT 4 Brake Fluid

Capacities

Fuel tank 20 L including 6 L reserve (5.3 U.S. gal including 1.6 gal reserve)

Engine/transmission oil oil change with filter 3.0 L (3.17 qt)

Coolant 2.5 L (2.65 qt)

Differential (front) 610 ml (21 U.S. oz)

Differential (rear) 200 ml (7 U.S. oz)

Brake Fluid 250 ml (8.5 oz)

Because of our ongoing commitment to product quality and innovation, John Deere reserves the right, at any time, to make changes in design and specifications and/or to make additions to, or improvements in its products without imposing any obligation upon itself to install them on its products previously manufactured.¹