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Honda Engines All Years GX GX120K1 R1 Parts
GX120K1-R1

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Engine Specifications for
GX120K1-R1

ModelModelGX120K1
TypeR1
EngineEngineNULL
Engine Serial Number PrefixGC01
Engine Starting Serial Number4300001
Engine Ending Serial NumberN/A
Valve ClearanceIN: 0.15 ± 0.02 mm EX: 0.20 ± 0.02 mm
CompressionDecompressor engaged: 711 ± 123 kPa (103± 18 psi) @ 600 rpm Decompressor disengaged: 979 ± 193 kPa (142 ± 28 psi) @ 600 rpm
Engine OilSAE 10W-40 API service category SE or SF
Engine Oil Capacity0.63 qt.
Oil FilterNULL
Engine SpeedIdle: 1,400 ± 150 rpm Maximum: 3,850 ± 150 rpm Maximum for DS type: 3,750 ± 150 rpm
TransmissionTransmission Oil Capacity1/2 reduction (centrifugal clutch type): 0.53 qt. 1/2 reduction (L type): Lubricated from engine crankcase 1/6 reduction: 0.16 qt.
FuelFloat Level13.7 mm (0.54 in.)
Fuel FilterNULL
Fuel StabilizerNULL
IgnitionSpark PlugNGK BP6ES NGK BPR6ES
Spark Plug Gap0.7 ~ 0.8 mm (0.028 ~ 0.031 in.)
MiscGear OilNULL
Gear Oil CapacityNULL
Power Trim FluidNULL
GreaseNULL
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