Yamaha YB50, Service Manual

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INSP
ADJ
INTRODUCTION / PERIODIC MAINTENANCE /
LUBRICATION INTERVALS
3-1
PERIOD INSPECTION AND ADJUSTMENTS
INTRODUCTION
This chapter includes all information necessary to carry out inspections and adjustments recom-
mended. These preventive maintenance procedures, if they are correctly followed, will ensure the
most reliable operation of the vehicle and a longer useful life. The need for overhauls and costly
repairs will be greatly reduced. This applies both to vehicles which are already in service and to
new vehicles which are ready for sale. All service technicians should familiarise themselves with
the entire chapter.
PERIODIC MAINTENANCE / LUBRICATION INTERVALS
ODOMETER READING
( x 1.000 km) ANNUAL
N. INTEM CHECK OR MAINTENANCE JOB 1 6 12 18 24 CHECK
1 * Fuel line • Check fuel hoses and vacuum hose
for cracks
√ √ √ √ √
2 Spark Plug • Check condition.
√ √
• Clean and regap.
• Replace. √ √
3Air filter element • Clean. √ √
• Replace. √ √
4 * Front brake • Check operation, fluid level and vehicle for
√ √ √ √ √ √
fluid leakage.
• Replace brake pads. Whenever worn to the limit
5 * Rear brake • Check operation and adjust brake lever freeplay. √ √ √ √ √ √
• Replace brake shoes. Whenever worn to the limit
6 * Brake hose • Check for cracks or damage. √ √ √ √ √
• Replace. (See NOTE on page 6-5) Every 4 years
7 * Wheels • Check runout and for damage. √ √ √ √
8 * Tires • Check tread depth and for damage.
• Replace if necessary.
√ √ √ √
• Check air pressure.
• Correct if necessary.
9 * Wheel • Check bearing for looseness or damage.
√ √ √ √
bearings
10 * Steering bearings • Check bearing play and steering for roughness. √ √ √ √ √
• Lubricate with lithium-soap-based grease. Every 24.000 km
11 * Chassis fasteners • Make sure that all nuts, bolts and screws are
√ √ √ √ √
properly tightened.
12 Centerstand • Check operation. √ √ √ √ √
• Lubricate.
13* Front fork • Check operation and for oil leakage. √ √ √ √
14 * Rear shock absorber • Check operation and shock absorber for oil
√ √ √ √
assembly leakage.
15 * Carburetor • Check starter (choke) operation.
√ √ √ √ √ √
• Adjust engine idling speed.
16 * Autolube pump • Check operation.
√ √ √ √
• Bleed if necessary.
17 Final gear oil • Check oil level and vehicle for oil leakage. √ √ √
• Change. √ √ √
18 * V-belt • Replace √ √
19 Front and rear brake • Check operation.
√ √ √ √ √ √
switches
20 * Moving parts • Lubricate. √ √ √ √ √
and cables
21 Lights, signals • Check operation.
√ √ √ √ √ √
and switches • Adjust headlight beam.
• Since these items require special tools, data and technical skills, have a Yamaha/MBK dealer perform the ser-
vice.
NOTE:
• The air filter needs more frequent service if you are riding in unusually wet or dusty areas.
• Hydraulic brake service
•• Regularly check and, if necessary, correct the brake fluid level.
•• Every two years replace the internal components of the brake master cylinder and caliper, and change the brake fluid.
•• Replace the brake hoses every four years and if cracked or damaged.