Honda GX160 T1/K1

Honda GX160 T1/K1The Honda GX160 T1/K1 is a 163 cc (9.95 cu·in) natural aspirated single-cylinder four-stroke air-cooled internal combustion small gasoline engine with a horizontal shaft, manufactured by Honda Motor Company for general-purpose applications.

It has a 68.0 mm (2.68 in) cylinder bore and 45.0 mm (1.77 in) piston stroke. The compression ratio rating is 7.5:1 or 8.5:1.

The GX160 T1/K1 engine produced 6.0 PS (4.4 kW; 6.0 HP) at 4,000 rpm of maximum horsepower and 11.0 N·m (1.1 kg·m, 8.1 ft·lb) at 2,500 rpm of maximum torque.

The Honda GX160 T1/K1 features:

  • Overhead valve (OHV) design
  • Transistorized magneto ignition system
  • Horizontal carburetor with butterfly valve
  • Centrifugal govervor
  • Splash type lubrication system
  • Forced air cooling system
  • Recoil or electirc starter

General information

Engine Specifications
Engine modelGX160 T1/K1
Engine type4-stroke, OHV, single-cylinder
Displacement163 cm3, (9.95 cu·in)
Max. horsepower6.0 PS (4.4 kW; 6.0 HP) at 4,000 rpm
Max. torque Crank PTO: 11.0 N·m (1.1 kg·m, 8.1 ft·lb) at 2,500 rpm
With 1/2 reduction: 22 N·m (2.2 kg·m, 16 ft·lb) at 1,250 rpm
With 1/6 reduction: 66 N·m (6.6 kg·m, 48 ft·lb) at 420 rpm
Cooling systemForced air
Air cleaner Dual element type
Semi-dry type
Oil-bath type
Cyclone type
Lubricating systemSplash type
Ignition systemTransistorized magneto ignition
Fuel systemHorizontal carburetor with butterfly valve
Fuel consumption230 g/PSh
Fuel tank capacity3.6 L (0.95 US. gal. 0.79 Imp. gal.)
Fuel usedUnleaded gasoline (octane number 86 or higher)
Starting systemRecoil or electirc starter
Stoping systemIgnition primary circuit ground
GovernorCentrifugal govervor
PTO shaft rotationCounterclockwise (from PTO shaft side)

Cylinder Block and Head

Cylinder block
Compression ratio:7.5:1 or 8.5:1
Cylinder bore:68.0 mm (2.68 in)
Piston stroke:45.0 mm (1.77 in)
Cylinder internal diameter (standard):68.000 mm (2.6772 in)
Piston skirt outer diameter (standard):67.985 mm (2.6766 in)
Number of piston rings (compression / oil):2/1
Connecting rod big end diameter (standard):30.020 mm (1.1819 in)
Connecting rod small end diameter (standard):18.005 mm (0.7089 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)
Side clearance (Oil):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 end gap (Oil):0.150-0.350 mm (0.0059-0.0138 in)
Ring width (Top):1.5 mm (0.0591 in)
Ring width (Second):1.5 mm (0.0591 in)
Ring width (Oil):2.5 mm (0.0984 in)
Crankpin journal diameter:29.980 mm (1.1803 in)
Crankshaft center distance:22.5 mm (0.885 in)
Cylinder head
Valve arrangement:OHV, gear driven
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)
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 bolt12 Nm; 1.2 kg·m; 9 ft·lb
Cylinder head bolt24 Nm; 2.4 kg·m; 17 ft·lb
Flywheel nut75 Nm; 7.5 kg·m; 54 ft·lb
Rocker arm pivot lock nut10 Nm; 1.0 kg·m; 7 ft·lb
Rocker arm pivot bolt24 Nm; 2.4 kg·m; 17 ft·lb
Crankcase cover bolt12 Nm; 1.2 kg·m; 9 ft·lb
Oil level switch joint nut10 Nm; 1.0 kg·m; 7 ft·lb
Oil drain bolt18 Nm; 1.8 kg·m; 13 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

Maximum speed:3,800-4,000 rpm
Idle speed:1,250-1,600 rpm
Cylinder compression:6.0-8.5 kg/cm2 (85-121 psi) at 600 rpm
Valve clearance
Intake valve clearance:0.15±0.02 mm (0.006±0.001 in)
Exhaust valve clearance:0.20±0.02 mm (0.008±0.001 in)
Oil system
Lubrication system:Splash type
Oil type:SAE 10W-30
Recommended oil:Honda 4-stroke or an equivalent (SE or SF)
Oil capacity:0.6 L (0.63 US. qt, 0.53 Imp. qt.)
Fuel system
Type:Horizontal carburetor with butterfly valve
Main jet: Externally vented carburetor bowl: #72
Internally vented carburetor bowl: #68
Float height:13.7 mm (0.5394 in)
Pilot screw opening: Externally vented carburetor bowl: 2 turns out
Internally vented carburetor bowl: 2-1/8 turns out
Ignition system
Type:Transistorized magneto ignition
Ignition timing:25° B.T.D.C. (Fixed)
Spark plug: NGK: BP6ES, BPR6ES
Spark plug gap:0.7-0.8 mm (0.0276-0.0315 in)
Spark plug torque:18 N·m (1.8 kg·m, 13.3 ft·lb)
Ignition coil air gap0.2-0.6 mm (0.0079-0.0240 in)


Manufacturer or BrandModels
HondaEB2500X, EC2000, EC2200, EG1500X, EG2200X, EG2500X, EM1800X, EM2500X
Author: Sergei Wers
About: 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.

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We try to use official documentation and verify the published data, but errors may occur. In addition, specifications of machinery and equipment may vary depending on markets and modifications. We do not recommend the use of this data for spare parts or repairs. Use official service manuals or parts catalogs for your product.

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