compression ratio YAMAHA MAJESTY 250 2003 Owners Manual

6-42
PERIODIC MAINTENANCE AND MINOR REPAIR
6 4. Remove the defective bulb by
pulling it out.
5. Insert a new bulb into the socket.
6. Install the lens by installing the
screws.
EC000108
cC
Do not overtighten the screws,
otherwise the lens may break.
7. Install the cowling.
1
1. Bulb
EAU03087
TroubleshootingTroubleshootingAlthough Yamaha scooters receive a
thorough inspection before shipment
from the factory, trouble may occur
during operation. Any problem in the
fuel, compression, or ignition sys-
tems, for example, can cause poor
starting and loss of power.
The following troubleshooting charts
represent quick and easy procedures
for checking these vital systems your-
self. However, should your scooter
require any repair, take it to a
Yamaha dealer, whose skilled techni-
cians have the necessary tools,
experience, and know-how to service
the scooter properly.
Use only genuine Yamaha replace-
ment parts. Imitation parts may look
like Yamaha parts, but they are often
inferior, have a shorter service life
and can lead to expensive repair
bills.
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8-1
EAU01038
SPECIFICATIONS
8
SpecificationsSpecificationsModel YP250A
Dimensions
Overall length 2,145 mm
Overall width 770 mm
Overall height 1,350 mm
Seat height 730 mm
Wheelbase 1,535 mm
Ground clearance 120 mm
Minimum turning radius 2,700 mm
Basic weight (with oil and full
fuel tank)177 kg
Engine
Engine type Liquid-cooled 4-stroke, SOHC
Cylinder arrangement Forward inclined single
cylinder
Displacement 249 cm
3
Bore ×Stroke 69.0 ×66.8 mm
Compression ratio 10:1
Starting system Electric starter
Lubrication system Wet sumpEngine oil
Type
Recommended engine oil
classification API Service SE, SF, SG type
or higher
cC
Do not use oils with a diesel specification of “CD” or oils of a
higher quality than specified. In addition, do not use oils
labeled “ENERGY CONSERVING II” or higher.
Quantity
Periodic oil change 1.2 L
Total amount (dry engine) 1.4 L
–10° 0° 10° 20° 30°
40°
SAE 10W/30
SAE 10W/40
SAE 20W/40
SAE 20W/50
–20°
SAE 15W/40 50°C
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