Release 00 - 11/2018
page 9
Daily progressive
number
3.1. Identication
Every engine is marked with a serial number pun-
ched on the base and afxed to the tank; this serial
number characters and can identify:
The serial number must be reported on every ope-
rating sheet in the warranty application and is fun-
damental for identifying and ordering spare parts.
3. TECHNICAL DATA AND SPECIFICATIONS
3.4. Expendable materials
WBE 170
Petrol
Unleaded (green)
minimum 90N.O.
Engine oil
- from 5 to 35 °C
- from -15 to +
35°C
SAE 30
10W30
Spark plug
RC12 YC
Starter rope ø 3,2x2200 mm
3.5. Use limits
The following table gives the use limits of certain
components subject to wear, after which the com-
ponent must be replaced.
WBE 120 WBE 140
Minimum inlet valve stem
diameter
5,32 mm
Minimum exhaust valve stem
diameter
5,27 mm
Minimum inlet valve head rim
thicknesse
0,50 mm
Minimum exhaust valve head
rim thickness
0,50 mm
Minimum valve spring length 34,50 mm
Maximum gap between ends of
cylinder rings
1,0 mm
Max. axial gap for compression
rings
0,15 mm
Minimum gudgeon pin diameter
12,95 mm
Max. gudgeon pin-piston seat
diameter
13,05 mm
Maximum
connecting
rod diameter
gudgeon pin
side
13,07 mm
crank side
26,07 mm
Diam. connecting rod’s pin on
engine shaft
25,92 mm
Verify the engine shaft extremes 0,10 mm
Diameter Pump seat on camshaft
13,92 mm
Diameter aspiration cam 27,30 mm
Diameter discharge cam 27,45 mm
3.2. Technical data
WBE 170
Displacement 166 cc
Bore 65 mm
Stroke 50 mm
Compression ratio 8,1 : 1
Speed (r.p.m.)
2900 (±100)
Fuel tank capacity
0,75 litres
Oil sump capacity 0,50 litres
Dry weight 8,50 kg
3.3. Adjustments
Distance between spark plug
electrodes
0,7 - 0,8 mm
Coil air gap 0,4 ± 0,05 mm
Inlet valve clearance 0,10 - 0,15 mm
Exhaust valve clearance 0,15 - 0,20 mm
Year of
manufacture
Date
WBE170 18162014 EURO(V)
484479-30/ME110003424/120
WBE170 18162014 EURO(V)
484479-30/ME110003424/120
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