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Kawasaki FX751V Engine

General Technical Data

Kawasaki FX751V Engine Specifications

Engine Model .............. Kawasaki FX751V
Engine Type .............. 4-cycle vertical shaft V-twin OHV air-cooled gasoline engine
Number of Cylinders .............. 2
Cylinder Liners .............. Cast iron
Displacement, cc (cu.in) .............. 852 (52.0)
Cylinder Bore, mm (in) .............. 84.5 (3.33)
Piston Stroke, mm (in) .............. 76.0 (2.99)
Rated Engine Power, hp (kW) .............. 24.5 (18.3)
Rated Engine Speed, rpm .............. 3600
Maximum Torque, Nm (ft-lb) .............. 60.2 (44.4)
Torque Speed, rpm .............. 2200
Compression Ratio .............. 8.2:1
Lubrication System .............. Pressure feed by positive displacement pump
Cooling System .............. Forced-air
Oil Filter .............. Cartridge type full flow
Air Cleaner .............. Dual stage element, heavy duty type
Ignition System .............. Transistorized-flywheel magneto
Starting System .............. Heavy duty shift type electric starter
Electrical System Rating, Volts .............. 12

Fuel System

Fuel System .............. Carburetor
Carburetor Type .............. Float type with fixed main jet, two barrel
Fuel Pump .............. Diaphragm type pulse pump
Fuel Type .............. Gasoline (86 or higher)
Governor Type .............. Flyweight all speed governor

Dimensions and Weight

Overall Length, mm (in) .............. 480 (18.9)
Overall Width, mm (in) .............. 460 (18.1)
Overall Height, mm (in) .............. 615 (24.2)
Net weight, kg (lbs) .............. 54.6 (124.1)

Kawasaki FX751V Maintenance Data

Cylinder Block and Valves

Cylinder Inside Diameter (Max), mm (in) .............. 84.55 (3.329)
Cylinder Compression, kPa (psi) .............. 440 (64)
Cylinder Head Warp, mm (in) .............. 0.03 (0.001)
Intake Valve Clearance, mm (in) .............. 0.10-0.15 (0.004-0.006)
Exhaust Valve Clearance, mm (in) .............. 0.10-0.15 (0.004-0.006)

Engine Oil and Filters

Engine Oil Type .............. SAE 10W-30, 10W-40, 5W-20
API Service Classifications .............. SF, SG, SH, SJ or SL
Oil Capacity (w/o Filter), L (qts) .............. 2.1 (2.2)
Oil Capacity (with New Filter), L (qts) .............. 2.3 (2.4)
Oil Filter Part Number .............. 49065-7010
Primary Air Filter Part Number .............. 11013-7038
Secondary Air Filter Part Number .............. 11013-7039

Carburetor Adjustment

Carburetor Model .............. Nikki 621266-881
Throttle Bore Diameter, mm (in) .............. 26.0 (1.02)
Venturi Diameter, mm (in) .............. 21.0 (0.83)
Main Jet (L) .............. #118
Main Jet (R) .............. #120
Pilot Jet .............. #56
Pilot Screw Setting .............. 3-1/4 turns
Low Idle Speed (Carburetor), rpm .............. 1450
Low Idle Speed (Governor), rpm .............. 1550
High Idle Speed, rpm .............. 3600

Ignition System

Spark Plug Type .............. NGK BPR4ES
Spark Plug Gap, mm (in) .............. 0.70-0.80 (0.0277-0.0316)
Coil Air Gap, mm (in) .............. 0.20-0.40 (0.0079-0.0158)
Spark Plug Torque, Nm (ft-lb) .............. 22 (16)

Service Intervals

Check Engine Oil Level .............. Every 10 hours
Change Engine Oil .............. Every 100 hours
Clean and Adjust Spark Plug .............. Every 100 hours
Clean Oil Cooler Fins .............. Every 100 hours
Replace Engine Oil Filter .............. Every 200 hours
Replace Primary Air Filter .............. Every 250 hours
Check Secondary Air Filter .............. Every 250 hours
Check Carburetor Adjustment .............. Every 300 hours
Check and Adjust Idle Speed .............. Every 300 hours
Check and Adjust Valve Clearance .............. Every 300 hours
Clean Combustion Chamber .............. Every 300 hours
Replace Spark Plug .............. Every 300 hours
Clean Fuel Line .............. Every 400 hours
Replace Secondary Air Filter .............. Every 500 hours

Kawasaki FX751V Service Specifications

Cylinder Block

Cylinder Inside Diameter (Max), mm (in) .............. 84.55 (3.329)
Cylinder Inside Diameter (Std), mm (in) .............. 84.48-84.50 (3.326-3.327)
Cylinder Bore Out Round, mm (in) .............. 0.05 (0.002)
Crankpin Width, mm (in) .............. 49.0 (1.93)
Connecting Rod Big End Inside Diameter, mm (in) .............. 40.04 (1.576)
Crankpin Outside Diameter, mm (in) .............. 39.94 (1.572)
Crankshaft Journal Diameter, mm (in) .............. 41.90 (1.650)
Connecting Rod Bend, mm (in) .............. 0.15/100 (0.006/3.94)
Connecting Rod Big End Width, mm (in) .............. 22.70 (0.8937)
Connecting Rod Small End Inside Diameter, mm (in) .............. 20.06 (0.7898)
Camshaft Journal Diameter, mm (in) .............. 19.98 (0.7866)
Camshaft Bearing Inside Diameter, mm (in) .............. 20.14 (0.7929)

Cylinder Head and Valves

Cylinder Head Warp, mm (in) .............. 0.03 (0.001)
Valve Clearance, mm (in) .............. 0.10-0.15 (0.004-0.006)
Valve Head Thickness, mm (in) .............. 0.4 (0.016)
Valve Stem Runout, mm (in) .............. 0.05 (0.002)
Valve Stem Diameter (Intake), mm (in) .............. 6.94 (0.2732)
Valve Stem Diameter (Exhaust), mm (in) .............. 6.93 (0.2728)
Valve Guide Inside Diameter, mm (in) .............. 7.000-7.015 (0.2756-0.2762)
Valve Seating Surface Angle, degrees .............. 45
Valve Seating Surface Width (Intake), mm (in) .............. 1.1-1.7 (0.043-0.067)
Valve Seating Surface Width (Exhaust), mm (in) .............. 1.0-1.5 (0.039-0.059)
Valve Spring Free Length, mm (in) .............. 38.3 (1.51)
Rocker Arm Push Rod Runout, mm (in) .............. 0.2 (0.008)
Rocker Shaft Outside Diameter, mm (in) .............. 10.91 (0.4295)
Rocker Arm Inside Diameter, mm (in) .............. 11.13 (0.4382)
Cam Lobe Height (Intake), mm (in) .............. 34.30 (1.350)
Cam Lobe Height (Exhaust), mm (in) .............. 35.13 (1.383)

Piston and Piston Rings

Piston Pin Outside Diameter, mm (in) .............. 19.96 (0.7858)
Piston Pin Hole Inside Diameter, mm (in) .............. 20.57 (0.8098)
Piston Diameter, mm (in) .............. 84.24 (3.316)
Top Ring Groove Clearance, mm (in) .............. 0.15 (0.0059)
Second Ring Groove Clearance, mm (in) .............. 0.18 (0.0071)
Top Ring Thickness, mm (in) .............. 1.13 (0.0445)
Second Ring Thickness, mm (in) .............. 1.08 (0.0425)
Top Ring End Gap, mm (in) .............. 0.7 (0.028)
Second Ring End Gap, mm (in) .............. 0.8 (0.031)
Oil Ring End Gap, mm (in) .............. 1.0 (0.039)

Tightening Torque Specs

Cylinder Head Bolts, Nm (ft-lb) .............. 46 (34)
Crankcase Cover Bolts, Nm (ft-lb) .............. 46 (34)
Flywheel Bolt, Nm (ft-lb) .............. 56 (41)
Valve Clearance Lock Screws, Nm (ft-lb) .............. 11 (8.2)
Connecting Rod Big End Cap Bolts, Nm (ft-lb) .............. 20.6 (15.2)
Rocker Arm Bolts, Nm (ft-lb) .............. 21 (15)
Rocker Cover Mounting Bolts, Nm (ft-lb) .............. 5.9 (4.4)
Fuel Pump Mounting Bolts, Nm (ft-lb) .............. 5.9 (4.4)
Spark Plugs, Nm (ft-lb) .............. 22 (16)
Governor Arm Clamp Nut, Nm (ft-lb) .............. 7.8 (5.8)
Carburetor Mounting Bolts, Nm (ft-lb) .............. 5.9 (4.4)
Intake Manifold Bolts, Nm (ft-lb) .............. 5.9 (4.4)
Air Creaner Holder Bracket Bolts, Nm (ft-lb) .............. 19.6 (14.4)