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Honda G100 Specifications
The Honda G100 K1 is a 83 cc (5.06 cubic inches) 4-cycle 1-cylinder air-coolled internal combustion small gasoline engine manufactured by Honda
Motor Company since 1980. The G100 K1 is the second generation of this engine. It has larger cylinder bore and, as a result, larger displacement.
The Honda G100 engine has a slide valve (L-head) design and camshaft driven by a single row chain driven by the crankshaft. The engine has an
electric or recoil starter, horizontal carburetor with butterfly valve and transistorized magneto or contact point breaker (CDI) ignition system.
There are three versions of G100 engine:
Honda G100, with 76 cc and 2.0 HP or 2.2 HP of power
Honda G100 K1, with 83 cc and 2.2 HP
Honda G100 K2, with 98 cc and 2.5 HP of maximum output power
The G100K1 engine a compression ratio rating is 6.5:1, cylinder bore and piston stroke are 48.0 mm (1.88 in) and 46.0 mm (1.81 in).
The Honda G100 K1 produced 2.2 HP (1.64 kW) at 4200 rpm of maximum power and 3.8 Nm (0.38 kgm) of torque.
| General Technical Data |
Engine Model .............. Honda G100
Engine Type .............. 4-cycle side valve 1-cylinder air-cooled small gasoline engine
Number of Cylinders .............. Single
Displacement (G100K1), cu.in (cc) .............. 5.06 (83)
Displacement (G100K2), cu.in (cc) .............. 6.00 (98)
Engine Bore (G100K1), in (mm) .............. 1.89 (48.0)
Engine Bore (G100K2), in (mm) .............. 2.06 (52.0)
Piston Stroke, in (mm) .............. 1.82 (46.0)
Rated Engine Power (G100K1), hp (kW) .............. 2.2 (1.64)
Rated Engine Power (G100K2), hp (kW) .............. 2.5 (1.85)
Rated Engine Speed, rpm .............. 4200
Maximum Torque (G100K1), Nm (ft-lbs) .............. 3.3 (2.4)
Maximum Torque (G100K2), Nm (ft-lbs) .............. 3.5 (2.5)
Torque Speed, rpm .............. 3000
Compression Ratio .............. 6.5:1
PTO Shaft Rotation .............. Counterclockwise (from PTO shaft side)
Valve Arrangement .............. L-head
Lubrication System .............. Splash type
Air Cleaner .............. Oil bath
Cooling System .............. Forced air
Ignition System .............. Flywheel magneto
Starter Type .............. Recoil
| Fuel System |
Fuel System Type .............. Carburetor
Carburetor Type .............. Horizontal with butterfly valve
Fuel Consumption, g/HPh .............. 320
Fuel Tank Capacity, qts (L) .............. 1.5 (1.4)
Fuel Type .............. Gasoline (66 or higher)
| Dimensions and Weight |
Overall Length, in (mm) .............. 10.8 (275)
Overall Width, in (mm) .............. 10.6 (270)
Overall Height, in (mm) .............. 13.6 (345)
Dry Weight, lbs (kg) .............. 19.2 (8.7)
| Cylinder Block |
Cylinder Bore Inside Diameter (G100K1, Std), in (mm) .............. 1.89 (48.00)
Cylinder Bore Inside Diameter (G100K1, Wear Limit), in (mm) .............. 1.8985 (48.055)
Cylinder Bore Inside Diameter (G100K2, Std), in (mm) .............. 2.06 (52.00)
Cylinder Bore Inside Diameter (G100K2, Wear Limit), in (mm) .............. 2.0577 (52.060)
Piston Skirt Outside Diameter (G100K1), in (mm) .............. 1.8503 (47.995)
Piston Skirt Outside Diameter (G100K2), in (mm) .............. 2.0549 (51.990)
Connecting Rod Small End Inside Diameter (Std), in (mm) .............. 0.393 (10.00)
Connecting Rod Small End Inside Diameter (Wear Limit), in (mm) .............. 0.397 (10.05)
Connecting Rod Big End Inside Diameter (Std), in (mm) .............. 0.708 (18.00)
Connecting Rod Big End Inside Diameter (Wear Limit), in (mm) .............. 0.713 (18.04)
Crank Pin Outside Diameter, in (mm) .............. 0.707 (17.98)
Top Ring Groove Side Clearance, in (mm) .............. 0.0004-0.002 (0.01-0.05)
Second Ring Groove Side Clearance, in (mm) .............. 0.0004-0.002 (0.01-0.05)
Oil Ring Groove Side Clearance, in (mm) .............. 0.0004-0.002 (0.01-0.05)
Top Ring End Gap, in (mm) .............. 0.009 (0.25)
Second Ring End Gap, in (mm) .............. 0.009 (0.25)
Oil Ring End Gap, in (mm) .............. 0.017 (0.45)
| Cylinder Head and Valves |
Number of Valves .............. 2
Cylinder Head (Max Out of Flatness), in (mm) .............. 0.004 (0.10)
Intake Valve Clearance, in (mm) .............. 0.0031-0.0063 (0.08-0.16)
Exhaust Valve Clearance, in (mm) .............. 0.0031-0.0063 (0.08-0.16)
Intake Valve Stem Outside Diameter (Std), in (mm) .............. 0.2161 (5.490)
Intake Valve Stem Outside Diameter (Wear Limit), in (mm) .............. 0.2154 (5.450)
Exhaust Valve Stem Outside Diameter (Std), in (mm) .............. 0.2143 (5.445)
Exhaust Valve Stem Outside Diameter (Wear Limit), in (mm) .............. 0.2134 (5.40)
Valve Guide Inside Diameter (Intake/Exhaust), in (mm) .............. 0.2165 (5.50)
Valve Spring Free Length, in (mm) .............. 1.066 (27.10)
Valve Seat Width (Intake/Exhaust), in (mm) .............. 0.028 (0.70)
Camshaft Journal Diameter, in (mm) .............. 0.4796 (12.184)
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