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Kawasaki FB460V Engine

General Technical Data

Kawasaki FB460V Engine Specifications

Engine Model .......... Kawasaki FB460V
Engine Type .......... Forced Air-cooled, Vertical Shaft, OHV, 4-Stroke Gasoline Engine
Number of Cylinder .......... One
Piston Displacement, cc (cu.in) .......... 460 (28.1)
Engine Bore, mm (in) .......... 89.0 (3.50)
Engine Stroke, mm (in) .......... 74.0 (2.91)
Engine Power, Hp (kW) .......... 12.5 (9.3)
Maximum Torque, Nm (ft-lb) .......... 28.1 (20.2)
Fast Idle Speed, rpm .......... 3350
Low Idle Speed, rpm .......... 1400
Lubricating Method .......... Pressurized
Oil Capacity, L (qt) .......... 1.4 (1.5)
Direction of Rotation .......... Counterclockwise facing the PTO Shaft
Choke Control .......... Automatic
Cooling System .......... Forced-air
Air Cleaner .......... Semi-cyclone Type with Dual Element
Cooling Air Inlet .......... Rotating Screen with Periphery Blade Protector

Fuel System

Fuel System Type .......... Carburetor
Carburetor Type .......... Float Fixed Main Jet
Fuel Pump .......... Diaphragm Type Pulse Pump
Governor .......... Mechanical
Fuel Capacity, L (qt) .......... 5.0 (5.1)

Ignition System

Ignition System Type .......... Flywheel Magneto Transistor
Charging Coil .......... 12V-3A
Spark Plug .......... Champion RCJ8 / NGK-BMR4A
Spark Plug Gap, mm (in) .......... 0.60-0.70 (0.024-0.028)
Spark Plug Torque, Nm .......... 13

Electrical System

Electrical System Rating, Volts .......... 12
Alternator Charging Capacity, Amp .......... 13
Electric Starter (Shift Type) .......... 12V-0.75 kW
Electric Starter (Bendix Type) .......... 12V-0.8 kW
Battery .......... 12AH/35AH

Dimensions

Length, mm (in) .......... 420 (16.6)
Width, mm (in) .......... 381 (15.1)
Height, mm (in) .......... 307 (12.1)
Dry weight, kg (lbs) .......... 36.0 (79.4)

Kawasaki FB460V Maintenance Data

Fuel Type (min. octane) .......... 86 Octane Unleaded
Engine oil type .......... SAE 5W-20
Engine oil capacity, L (qts) .......... 1.4 (1.5)
Oil filter change interval .......... Every 100 hours
Oil change interval .......... Every 100 hours
Fuel filter change interval .......... Every 150 hours

Kawasaki FB460V Service Specifications

Cylinder Head and Valves

Cylinder Head Warp (Maximum), mm (in) .......... 0.4 (0.015)
Intake Valve Spring Free Length (Minimum), mm (in) .......... 43.3 (1.705)
Exhaust Valve Spring Free Length (Minimum), mm (in) .......... 39.0 (1.535)
Intake Valve Stem Diameter (Minimum), mm (in) .......... 7.912 (0.3115)
Exhaust Valve Stem Diameter (Minimum), mm (in) .......... 7.919 (0.3118)
Valve Stem Bend (Maximum), mm (in) .......... 0.03 (0.0012)
Valve Guide Reject Size (Maximum), mm (in) .......... 8.062 (0.3174)
Intake/Exhaust Valve Seat Width, mm (in) .......... 1.0 - 1.6 (0.039 - 0.063)
Intake/Exhaust Valve Seat Angle, deg .......... 45
Intake/Exhaust Valve Face Angle, deg .......... 45
Tappet Clearance (Intake/Exhaust), mm (in) .......... 0.1 - 0.16 (0.0039 - 0.0063)

Cylinder Block

Cylinder Bore Diameter (Maximum), mm (in) .......... 89.000 (3.5039)
Cylinder Bore Diameter (Minimum), mm (in) .......... 88.980 (3.5031)
Cylinder Bore Wear Tolerance (Maximum), mm (in) .......... 0.076 (0.003)
Cylinder Bore Out Of Round (Maximum), mm (in) .......... 0.063 (0.0025)
Cylinder Boring Size (0.25 mm Oversize), mm (in) .......... 89.230 - 89.210 (3.5130 - 3.5122)
Cylinder Boring Size (0.50 mm Oversize), mm (in) .......... 89.480 - 89.460 (3.5228 - 3.5220)
Cylinder Boring Size (0.75 mm Oversize), mm (in) .......... 89.730 - 89.710 (3.5327 - 3.5319)
Camshaft Bearing Inside Diameter (Maximum), mm (in) .......... 16.068 (0.6326)
Top Ring Groove Width (Maximum), mm (in) .......... 2.120 (0.0835)
Second Ring Groove Width (Maximum), mm (in) .......... 2.095 (0.0825)
Oil Ring Groove Width (Maximum), mm (in) .......... 4.055 (0.1596)
Top Piston Ring Thickness (Minimum), mm (in) .......... 1.945 (0.0766)
Second Piston Ring Thickness (Minimum), mm (in) .......... 1.941 (0.0764)
Top and Second Piston Ring End Gap (Maximum), mm (in) .......... 0.7 (0.028)
Piston Pin Hole Diameter (Maximum), mm (in) .......... 21.028 (0.8279)
Piston Pin Diameter (Minimum), mm (in) .......... 20.978 (0.8259)
Connecting Rod Small End Inside Diameter (Maximum), mm (in) .......... 21.039 (0.8283)
Connecting Rod Big End Inside Diameter (Maximum), mm (in) .......... 37.066 (1.4593)
Connecting Rod Big End Journal Diameter (Maximum), mm (in) .......... 36.934 (1.4541)

Crankshaft and Camshaft

Crankshaft Bearing Journal Diameter (PTO Side, Minimum), mm (in) .......... 34.914 (1.3746)
Crankshaft Bearing Journal Diameter (Magneto Side, Minimum), mm (in) .......... 34.945 (1.3757)
Crankshaft Link Rod Journal Diameter (Minimum), mm (in) .......... 53.951 (2.12406)
Crankshaft Alignment, mm (in) ..........0.05 (0.002)
Link Rod Small End Inside Diameter (Maximum), mm (in) .......... 12.059 (0.4748)
Link Rod Big End (Bushing) Inside Diameter (Maximum), mm (in) .......... 54.121 (2.1307)
Bushing Inside Diameter (Maximum), mm (in) .......... 26.097 (1.02744)
Support Shaft Diameter (Minimum), mm (in) .......... 25.927 (1.0208)
Crankshaft End Play, mm (in) .......... 0.09 - 0.20 (0.035 - 0.0078)
Camshaft Bearing Surface Diameter (PTO Side, Minimum), mm (in) .......... 19.907 (0.7837)
Camshaft Bearing Surface Diameter (Magneto Side, Minimum), mm (in) .......... 15.907 (0.6263)
Lobe Height (Minimum), mm (in) .......... 35.40 (1.3937)

Carburetor

Model .......... FB460D-AS / FB460D-BS
Main jet .......... #112.5 / 115
Pilot jet .......... #47.5 / #47.5
Float valve .......... 1.5 mm (0.059 in)
Pilot screw (Turn out) .......... 1-1/8
Low Idle Speed .......... 1350 - 1450 rpm
Fast Idle Speed .......... 3275 - 3425 rpm

Electric Starter

Brush Lenght (Bendix Type), mm (in) .......... 12.0 (0.47)
Brush Lenght (Shaft Type), mm (in) .......... 6.0 (0.24)
Commutator Groove Depth, mm (in) .......... 0.2 (0.008)
Commutator Diameter (Bendix Type), mm (in) .......... 32.0 (1.26)
Commutator Diameter (Shaft Type), mm (in) .......... 27.0 (1.10)
Commutator Run-Out (Bendix Type), mm (in) .......... 0.3 (0.012)
Commutator Run-Out (Shaft Type), mm (in) .......... 0.4 (0.016)

Tightening Torque Specs

Connecting rod bolt, Nm (ft-lbs) .......... 19-20 (14-15)
Crankcase cover bolt, Nm (ft-lbs) .......... 17-23 (12-17)
Cylinder head bolt and nut, Nm (ft-lbs) .......... 34-39 (25-29)
Flywheel nut, Nm (ft-lbs) .......... 83-88 (62-65)
Spark Plug, Nm (ft-lbs) .......... 28 (20)
Pump Cover, Nm (ft-lbs) .......... 17-23 (12-17)
Electric starter to block bolt and nut, Nm (ft-lbs) .......... 16 (12)
Electric starter terminal nut, Nm (ft-lbs) .......... 9 (6)
Oil drain plug, Nm (ft-lbs) .......... 23 (17)