Periodic Checks And Adjustments; Introduction; Periodic Maintenance Chart For The Emission Control System - Yamaha YXR70FX Service Manual

INTRODUCTION/PERIODIC MAINTENANCE CHART
FOR THE EMISSION CONTROL SYSTEM
EBS00029

PERIODIC CHECKS AND ADJUSTMENTS

INTRODUCTION

This chapter includes all information necessary to perform recommended checks 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 to new vehicles that are being prepared for sale. All
service technicians should be familiar with this entire chapter.
PERIODIC MAINTENANCE CHART FOR THE EMISSION CONTROL
SYSTEM
• For vehicles not equipped with an odometer or hour meter, follow the month maintenance inter-
vals.
• For vehicles equipped with an odometer or an hour meter, follow the km (mi) or hours mainte-
nance intervals. However, keep in mind that if the vehicle isn't used for a long period of time, the
month maintenance intervals should be followed.
• Items marked with an asterisk should be performed by a Yamaha dealer as they require special
tools, data and technical skills.
ITEM
• Check fuel hose for cracks or damage.
Fuel line*
• Replace if necessary.
• Check valve clearance.
Valves*
• Adjust if necessary.
• Check condition.
Spark plug • Adjust gap and clean.
• Replace if necessary.
Crankcase breather • Check breather hose for cracks or damage.
system* • Replace if necessary.
• Check for leakage.
Exhaust system* • Tighten if necessary.
• Replace gasket(s) if necessary.
Spark arrester • Clean.
Whichever
ROUTINE comes first
3 - 1
INITIAL
month 1 3
km 320 1,200 2,400
(mi) (200) (750) (1,500)
hours 20 75
CHK
ADJ
EVERY
6 6 12
2,400 4,800
(1,500) (3,000)
150 150 300
3