clutch YAMAHA PW50 2020 Owners Manual

Periodic maintenance an d a djustment
7-9
7
4. Install the transmission oil drain
bolt and its new gasket, and then
tighten the bolt to the specified
torque.
5. Refill with the specified amount of the recommended transmission
oil.
NOTICE
ECA10453
In or der to prevent clutch slip-
pa ge (since the transmission oil
also lu bricates the clutch), do
not mix any chemical additives.
Do not use oils with a diesel
specification of “CD” or oils of a
hi gher quality than specifie d. In
a ddition, do not use oils la bele d
“ENERGY CONSERVING II” or
hi gher.
 Make sure that no forei gn mate-
rial enters the transmission.
6. Check the O-ring for damage, and replace it if necessary. 7. Install and tighten the transmis-
sion oil filler cap.
8. Start the engine, and then let it idle for several minutes while checking
the transmission for oil leakage. If
oil is leaking, immediately turn the
engine off and check for the cau-
se.
Tightening torque:
Transmission oil drain bolt: 14 N·m (1.4 kgf·m, 10 lb·ft)
Recommen ded transmission oil:
See page 9-1.
Oil chan ge quantity:
0.30 L (0.32 US qt, 0.26 Imp.qt)
1. O-ring
1
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Specifications
9-1
9
Dimensions:
Overall length:1245 mm (49.0 in)
Overall width:
610 mm (24.0 in)
Overall height: 705 mm (27.8 in)
Seat height: 475 mm (18.7 in)
Wheelbase:
855 mm (33.7 in)
Ground clearance: 95 mm (3.74 in)
Minimum turning radius: 1.3 m (4.27 ft)
Wei ght:
Curb weight:
41 kg (90 lb)
Maximum rider weight: 25.0 kg (55 lb)
Technical permissible mass (Maximum load +
Curb weight): 66 kg (146 lb)
Noise an d vi bration level: (Europe)
Noise level (77/311/EEC):
75.1 dB(A) at 2750 r/min
Uncertainty of measurement: 3.0 dB(A)
Vibration on seat (EN1032, ISO5008): Will not exceed 0.5 m/s²
Uncertainty of measurement:
0.1 m/s²
Vibration on handlebar (EN1032, ISO5008): Will not exceed 2.5 m/s²
Uncertainty of measurement: 0.4 m/s²
Engine:
Combustion cycle:
2-stroke
Cooling system: Air cooled
Number of cylinders:
Single cylinder
Displacement: 49 cm³
Bore × stroke:
40.0 × 39.2 mm (1.57 × 1.54 in)
Compression ratio:
6.0 : 1 Starting system:
Kickstarter
Lubrication system: Separate lubrication
Engine oil:
Engine oil:
YAMALUBE 2S or 2-stroke engine oil
(JASO FC grade or ISO EG-C [or EG-D]
grade)
Recommended brand:
YAMALUBE
Engine oil quantity: Engine oil tank capacity:
0.30 L (0.32 US qt, 0.26 Imp.qt)
Transmission oil:
Type: Motor oil SAE 10W-30 type SE or higher or
Gear oil SAE 85W GL-3
Quantity: 0.30 L (0.32 US qt, 0.26 Imp.qt)
Air filter:
Air filter element:
Wet element
Fuel:
Recommended fuel:Regular unleaded gasoline only
Fuel tank capacity:
2.0 L (0.5 US gal, 0.4 Imp.gal)
Car buretor:
Type × quantity:
VM12SC × 1
Spark plu g(s):
Manufacturer/model:
NGK/BP4HS (South Africa)
NGK/BPR4HS (Canada, Europe, Oceania)
Manufacturer/model: DENSO/W14FP-L (South Africa)
Spark plug gap: 0.6–0.7 mm (0.024–0.028 in)
Clutch:
Clutch type:Wet, centrifugal, shoe
Drivetrain:
Primary reduction ratio:
1.909 (63/33)
Final drive: Shaft
Secondary reduction ratio: 6.218 (19/15 x 54/11)
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