Honda GXV140

Honda GXV140The Honda GXV140 is an 135 cc, (8.24 cu·in) natural aspirated single-cylinder four-stroke air-cooled internal combustion gasoline engine with a vertical shaft, manufactured by Honda Motor Company for general-purpose applications.

Cylinder bore and piston stroke are 64.0 mm (2.52 in) and 42.0 mm (1.65 in), respectively. Compression ratio rating is 8.0:1.

This engine produced 5.0 PS (3.7 kW; 5.0 HP) at 3,600 rpm of horsepower and 10.3 N·m (1.1 kg·m, 7.6 ft·lb) at 2,700 rpm of torque.

The Honda GXV140 features:

  • OHV design
  • C.D.I.(Capacitor Discharge Ignition) ignition system
  • Horizontal type carburetor with butterfly valve
  • Centrifugal governor
  • Splash lubrication system
  • Forced air cooling system
  • Recoil starter

General information

Engine Specifications
Engine model GXV140
Engine type 4-stroke, OHV, single-cylinder
Displacement 135 cm3, (8.24 cu·in)
Max. horsepower 5.0 PS (3.7 kW; 5.0 HP) at 3,600 rpm
Max. torque 10.3 N·m (1.1 kg·m, 7.6 ft·lb) at 2,700 rpm
Cooling system Forced air
Lubricating system Splash
Ignition system C.D.I.(Capacitor Discharge Ignition)
Fuel system Horizontal type carburetor with butterfly valve
Fuel consumption 250 g/HPh
Fuel tank capacity 1.0 L (0.26 US. gal. 0.22 Imp. gal.)
Fuel used Unleaded gasoline (octane number 86 or higher)
Starting system Recoil starter
Stoping system Ignition primary circuit ground
Governor Centrifugal governor
PTO shaft rotation Counterclockwise (from PTO shaft side)
Dimensions (L x W X H)
Dry weight

Cylinder Block and Head

Cylinder block
Compression ratio: 8.0:1
Cylinder bore: 64.0 mm (2.52 in)
Piston stroke: 42.0 mm (1.65 in)
Cylinder internal diameter (standard): 64.000 mm (2.5197 in)
Piston skirt outer diameter (standard): 63.985 mm (2.5191 in)
Number of piston rings (compression / oil): 2/1
Connecting rod big end diameter (standard): 26.020 mm (1.0244 in)
Connecting rod small end diameter (standard): 13.005 mm (0.512 in)
Piston pin diameter: 13.000 mm (0.5118 in)
Side clearance (Top): 0.015-0.045 mm (0.0006-0.0018 in)
Side clearance (Second): 0.015-0.045 mm (0.0006-0.0018 in)
Ring end gap (Top): 0.200-0.400 mm (0.0079-0.0157 in)
Ring end gap (Second): 0.200-0.400 mm (0.0079-0.0157 in)
Ring width (Top): 1.500 mm (0.0591 in)
Ring width (Second): 1.500 mm (0.0591 in)
Crankpin journal diameter: 25.980 mm (1.0228 in)
Cylinder head
Valve arrangement: OHV, gear driven
Valves: 2
Valve steam diameter (INTAKE): 5.480 mm (0.2157 in)
Valve steam diameter (EXHAUST): 5.440 mm (0.2142 in)
Valve spring free length (INTAKE): 30.500 mm (1.2008 in)
Valve spring free length (EXHAUST): 30.500 mm (1.2008 in)
Camshaft lobe height (INTAKE): 27.700 mm (1.0905 in)
Camshaft lobe height (EXHAUST): 27.750 mm (1.0925 in)
Camshaft journal diameter : 13.984 mm (0.5506 in)

Tightening torque specs

Tightening torque specs
Connecting rod lower cap 12 Nm; 1.2 kg·m; 9 ft·lb
Cylinder head bolt 24 Nm; 2.4 kg·m; 17 ft·lb
Flywheel nut 52 Nm; 5.2 kg·m; 38 ft·lb
Pivot adjusting nut 10 Nm; 1.0 kg·m; 7 ft·lb
Pivot bolt 24 Nm; 2.4 kg·m; 17 ft·lb
Oil drain bolt 18 Nm; 1.8 kg·m; 13 ft·lb
Oil pan bolt 12 Nm; 1.2 kg·m; 9 ft·lb
Standard torque values
Bolt, nut (5 mm) 5.5 Nm; 0.55 kg·m; 4.0 ft·lb
Bolt, nut (6 mm) 10 Nm; 1.0 kg·m; 7 ft·lb
Bolt, nut (8 mm) 24 Nm; 2.4 kg·m; 17 ft·lb
Bolt, nut (10 mm) 37.5 Nm; 3.75 kg·m; 27 ft·lb
Bolt, nut (12 mm) 55 Nm; 5.5 kg·m; 40 ft·lb

Service Data

Engine
Maximum speed: 3,100 ± 100 rpm
Idle speed: 2,100 ± 150 rpm
Cylinder compression: 6.0-8.5 kg/cm2 at 600 rpm
Valve clearance
Intake valve clearance: 0.13-0.17 mm (0.0051-0.0067 in)
Exhaust valve clearance: 0.18-0.22 mm (0.0071-0.0087 in)
Oil system
Lubrication system: Splash
Oil type: Honda 4-stroke or an equivalent (SE or SF)
Recommended oil: SAE 10W-30
Oil capacity: 0.6 L (0.63 US. qt, 0.53 Imp. qt.)
Fuel system
Type: Horizontal type carburetor with butterfly valve
Main jet: #60
Float height: 12.2-15.2 mm (0.48-0.60 in)
Pilot screw opening: 1/2 turns out
Ignition system
Type: C.D.I.(Capacitor Discharge Ignition)
Ignition timing: 25° B.T.D.C.
Spark plug: NGK: BP5ES, BPR5ES
NIPPONDENSO: W16EP-U, W16EPR-U
Spark plug gap: 0.7-0.8 mm (0.0276-0.0315 in)

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