Introduction; Periodic Maintenance/Lubrication Intervals - Yamaha YQ50 Service Manual

INTRODUCTION/PERIODIC MAINTENANCE/
PERIODIC INSPECTION AND ADJUSTMENT

INTRODUCTION

This chapter includes all information necessary to perform recommended inspections and adjustments.
These preventive maintenance procedures, if followed, will ensure more reliable vehicle operation and
a longer service life. The need for costly overhaul work will be greatly reduced. This information applies
to vehicles already in service as well as new vehicles that are being prepared for sale. All service
technicians should be familiar with this entire chapter.

PERIODIC MAINTENANCE/LUBRICATION INTERVALS

ITEM
1 Spark plug
2 Air filter
3 * Carburetor
4 * Fuel line
5 * Transmission oil
6 * Autolube pump
7 * Brakes (front and rear)
8 * Cooling system
9 * Wheels
10 * Wheel bearings
11 * Steering bearing
12 * Rear shock absorber
13 * V-belt
14 * Fitting/Fasteners
15 * Centerstand
16 * Battery
Items marked with an asterisk ( * ) require special tools, data and technical skills for servicing.
Take the scooter to a Yamaha or MBK Dealer when servicing these items.
** : Medium weight wheel bearing grease.
LUBRICATION INTERVALS
ROUTINE
• Check condition.
• Clean or replace if necessary.
• Clean.
• Replace if necessary.
• Check idle speed/choke operation.
• Adjust if necessary.
• Check fuel hose and vacuum pipe for cracks or
damage.
• Replace if necessary.
• Check for oil leakage.
• Correct if necessary.
• Replace every 12,000 (8,000) or 24 months.
(Warm engine before draining.)
• Check operation.
• Correct if necessary.
• Bleed the air.
• Check operation/fluid leakage/See NOTE.
• Correct if necessary.
• Check hoose condition.
• Replace if necessary.
• Replace coolant every 12.000 (8,000) or 24 months.
• Check damage/runout/Tightening torque.
• Replace/tighten if necessary.
• Check bearing assembly for looseness/damage.
• Replace if damaged.
• Check bearing assembly for looseness.
• Correct if necessary.
• Moderately repack every 12,000 (8,000) or 24 months.**
• Check operation/oil leakage.
• Replace if necessary.
• Check damage and wear.
• Replace if necessary.
• Check all chassis fittings and fasteners.
• Tighten if necessary.
• Check operation.
• Repair if necessary.
• Check specific gravity.
• Check breather pipe for proper operation.
• Correct if necessary.
3-1
INSP
ADJ
Unit : Km(miles)
EVERY
3,000
BREAK-IN
(2,000)or (4,000)or
1,000(600)
6 months 12 months
REPLACE
6,000