Specifications & Technical Data; Maintenance Specifications - Zenoah G231PUM Owner's Service Manual

2) SPECIFICATIONS & TECHNICAL DATA
Items
Type
Bore x Stroke
Displacement
Effective
Compression Ratio
Type (Walbro)
Carburetor
Venturi (mm)
Air Cleaner
Starting
Ignition
BTDC°/rpm
Spark Plug
Option
Idle Speed
Max. Power kW/rpm
Max. Torque N·m/rpm
Fuel Consumption g/kW·H
Weight

3) MAINTENANCE SPECIFICATIONS

Items
Cylinder
Bore (mm)
Diameter (mm)
Piston Ring
Groove width (mm)
Piston Piston Pin Hole (mm)
Clearance between
Piston and
Cylinder (mm)
Clearance between
Groove and
Piston Ring (mm)
Piston End Gap (mm)
Ring
Width (mm)
Piston Pin Diameter (mm)
Connecting Rod Small end (mm)
Crankshaft Dia. at Main Bearing (mm)
Eccentricity (mm)
Axial Play (mm)
Main Bearing
unit G231PUM
— Water Cooled
mm 32x28
cm 3 22.5
— 8.4
WT-644
ø12.7
—
— Recoil Starter
Type CDI
30/7000
STD RZ7C
CMR6H/7H
rpm 3500
2.09/12000
1.79/10000
720
kg 1.55
(✽): Without Muffler
G231PUM/PUH
Standard Limit
ø32 Plating damaged
ø31.97 ø31.87
1.01 1.11
ø8.01 ø8.05
0.03~0.06 0.15
0.02~0.04 0.1
0.05~0.25 0.5
0.98 0.93
ø8 ø7.98
ø11 ø11.05
ø12 ø11.98
— 0.07
— 0.5
Gritty or
—
Feels Flat Spot
G231PUH G260PU
Air Cooled Air Cooled
←
34x28
←
25.4
← ←
WT-643 WT-645
← ←
Dry Type —
Hand flipping
←
or
Electric Motor
← ←
←
28/7000
← ←
— —
1800
3000
APC 18x8
1.58/13000 1.62/12000
1.34/9000 1.48/9000
700 790
1.78 (✽ 1.58) 1.69 (✽ 1.52)
G260PU/PUM/PUH
Standard Limit Standard
ø34 Plating damaged
ø33.97 ø33.87 ø35.97
1.01 1.11 1.01
ø8.01 ø8.05 ø8.01
0.03~0.06 0.15 0.03~0.06
0.02~0.04 0.1 0.02~0.04
0.05~0.25 0.5 0.05~0.25
0.98 0.93 0.98
ø8 ø7.98
ø11 ø11.05
ø12 ø11.98
— 0.07
— 0.5
Gritty or
—
Feels Flat Spot
G260PUM G260PUH
Water Cooled Air Cooled
←
←
←
WT-644 WT-643
←
— Dry Type
Recoil Starter
←
30/7000
←
CMR6H/7H
3500 3000
2.16/12000 1.71/13000
1.91/9500 1.42/9500
710
1.54 1.77 (✽ 1.57)
Specifications are subject to change without notice.
G290PUM
Limit Measuring Device
ø36 Plating damaged Eye Checking
ø35.87 Micro Meter
1.11 Thickness Gauge
ø8.05 Cylinder Gauge
Micro Meter
0.15
Cylinder Gauge
0.1 Thickness Gauge
0.5 Thickness Gauge
0.93 Micro Meter
ø8 ø7.98 Micro Meter
ø11 ø11.05 Cylinder Gauge
ø12 ø11.98 Micro Meter
— 0.07 Dial Gauge
— 0.5 Thickness Gauge
Gritty or
—
Feels Flat Spot
G290PUM
Water Cooled
←
36x28
←
28.5
←
9.9
WT-644
← ←
—
← ←
← ←
← ←
← ←
— CMR6H/7H
3500
—
—
760 —
1.59
Remarks
At the skirt end
and the right angle
to the piston pin.
When inserted
in a new
cylinder.
—
11