The Kawasaki FD680V is a 0.68 l (675 cc, 41.19 cu-in) V-twin 90° liquid-cooled 4-stroke internal combustion small gasoline motor with vertical shaft, manufactured by Kawasaki Heavy Industries LTd., for general-purpose applications.
The FD680V has OHV (overhead V-valves) design; cast-iron cylinder liners; twin-barrel, internally vented carburetor with fuel shut-off solenoid; electronic spark ignition system. The Kawasaki FD680V uses a full pressure lubrication system with spin-on oil filter and dual element air cleaner.
The Kawasaki FD680V develops 23.4 PS (17.2 KW; 23.0 HP) at 3,600 rpm and 54.0 Nm (5.5 kg·m; 39.8 ft·lb) at 2,400 rpm of torque. It has a 72.5 mm (2.85 in) cylinder bore and 76 mm (2.99 in) piston stroke. Compression ratio rating is 8.5:1.
General information
Engine Specifications
Model
FD680V
Type
4-stroke, OHV, V-twin 90°
Displacement
675 cm 3 (41.19 cu-in)
Max. horsepower
23.4 PS (17.2 KW; 23.0 HP) at 3,600 rpm
Max. torque (crank PTO)
54.0 Nm (5.5 kg·m; 39.8 ft·lb) at 2,400 rpm
Carburetor
Twin barrel, internally vented
Cooling system
Liquid-cooling
Ignition system
Electronic spark
Lubricating system
Pressure feed lubrication system
Starting system
Electric starter
Charging system
High Amp charging coil
Fuel used
Unleaded gasoline (octane number 86 or higher)
Fuel consumption
245 g/HPh
Cooling system
Pressurized forced circulation type
Dimensions and Weight
Kawasaki FD680V
Length, mm (in)
563 (22.2)
Width, mm (in)
424 (16.7)
Height, mm (in)
431 (17.0)
Dry weight, kg (lb)
48.0 (105.8)
Tightening torque specs
Tightening torque specs
Cylinder head
32 Nm; 3.2 kg·m; 23.6 ft·lb
Connecting rod
9.8 Nm; 1.0 kg·m; 7.2 ft·lb
Flywheel
56 Nm; 5.6 kg·m; 41 ft·lb
Crankcase cover
21 Nm; 2.1 kg·m; 15.5 ft·lb
Intake manifold
6 Nm; 6.0 kg·m; 4.4 ft·lb
Oil drain plug
7 Nm; 0.7 kg·m; 5.2 ft·lb
Valve clearance lock nut
11 Nm; 1.1 kg·m; 8.1 ft·lb
Maintenance data
Engine
Maximum speed
3500 ± 100 rpm
Idle speed
1500 ± 100 rpm
Cylinder compression
7.0 kg/cm2 (99 psi) at 500 rpm
Valve clearance
Intake valve
0.15 mm (0.006 in)
Exhaust valve
0.15 mm (0.006 in)
Oil system
Oil type
4-stroke or an equivalent (SC, SD, SE, SF, SG, or SH)
Recommended oil
SAE 10W-40, 10W-30, 5W-20
Oil capacity (with filter changed)
2.0-2.3 L
Ignition system
Spark plug
NGK: BPR2ES
Spark plug gap
0.75 mm (0.029 in)
Spark plug tightening torque
25 Nm; 2.5 kg·m; 18.4 ft·lb
Author:Sergei WersAbout: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.
The Kawasaki FD680V is a 0.68 l (675 cc, 41.19 cu-in) V-twin 90° liquid-cooled 4-stroke internal combustion small gasoline motor with vertical shaft, manufactured by Kawasaki Heavy Industries LTd., for general-purpose applications. 
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