Honda GX120K1, Manual, Page: 38 / 133

2-6
SERVICE INFORMATION GX120K1•GX160K1•GX200
*1: Externally vented carburetor bowl (all types except QXC).
*2: Internally vented carburetor bowl (QXC type only).
*3: Rammer type
*4: U,UT,U1,UT1 types
(Refer to page 6-8
for identification of the carburetor vent type)
Valves Valve
clearance
IN 0.15±0.02 mm (0.006±0.001 in) -----
EX 0.20±0.02 mm (0.008±0.001 in) -----
Stem O.D. IN 5.48 mm (0.216 in) 5.318 mm (0.2094 in)
EX 5.44 mm (0.214 in) 5.275 mm (0.2077 in)
Guide I.D. IN/EX 5.50 mm (0.217 in) 5.572 mm (0.2194 in)
Stem
clearance
IN 0.02-0.044 mm (0.0008-0.0017 in) 0.10 mm (0.004 in)
EX 0.06-0.087 mm (0.0024-0.0034 in) 0.12 mm (0.005 in)
Seat width 0.8 mm (0.03 in) 2.0 mm (0.08 in)
Spring free
length
IN/EX 30.5 mm (1.20 in) 29.6 mm (1.161 in)
Camshaft Cam height IN 27.7 mm (1.09 in) 27.45 mm (1.081 in)
EX 27.75 mm (1.093 in) 27.50 mm (1.083 in)
Camshaft O.D. 13.984 mm (0.5506 in) 13. 916 mm (0.5479 in)
Crankcase
cover
Camshaft holder I.D. 14.0 mm (0.55 in) 14.048 mm (0.5531 in)
Carburetor Main jet
#70
*1,*2
, #72
*3
-----
Float height 13.7 mm (0.54 in)
18.7 mm (0.74 in)
*3
-----
Pilot screw opening
3 turns out
*1
, 2-1/8 turns out
*2,*3
-----
Spark plug Gap 0.7-0.8 mm (0.028-0.031 in) -----
Spark plug cap Resistance 7.5-12.5 -----
Ignition coil Resistance Primary coil 0.8-1.0 -----
Secondary
coil
5.9-7.1 k -----
Air gap (at flywheel) 0.4±0.2 mm (0.016±0.008 in) -----
Starter motor Brush length
Mica depth
11.0 mm (0.43 in)
1.6 mm (0.06 in)
6.0 mm (0.24 in)
1.1 mm (0.04 in)
1/2 Reduction
(centrifugal
clutch type)
Friction disc thickness
Clutch plate warpage
3.5 mm (0.14 in)
-----
3.0 mm (0.12 in)
0.10 mm (0.004 in)
PART ITEM GX160K1
STANDARD SERVICE LIMIT
gx120k1_gx160k1_gx200