Periodic Inspections And Adjustments; Introduction; Periodic Maintenance Emission Control System - Yamaha VMX12H Supplementary Service Manual

PERIODIC INSPECTIONS AND ADJUSTMENTS

INTRODUCTION

This chapter includes all information necessary t o 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.
MAINTENANCE
Proper periodic maintenance is important. Especially important are the maintenence services related
to emissions control, These controls not only function to ensure cleaner air but are also vital t o proper
engine operation and maximum performance. In the following maintenance tables, the services related
t o emissions control are grouped separately.

PERIODIC MAINTENANCE EMISSION CONTROL SYSTEM

I I
No.
Check and adjust valve
clearance when engine
is cold.
Check condition. Adjust gap
and clean. Replace a t
2 Spark plug 13,000 km (or 13 months)
and thereafter every 12,000
km (or 12 months).
Crankcase Check ventilation hose for
ventilation cracks or damage. Replace
system if necessary.
Check fuel hose and vacuum
Fuel line pipe for cracks or damage.
Replace if necessary.
Replace initial 31,000 km
(19,600 mi) and thereafter
every 30,000 km
(19,000 mi).
Check for leakage.
Exhaust Retighten if necessary.
system Replace
necessarv.
Adjust synchronization of
carburetors.
nization
Check and adjust engine
speed idle speed. Adjust cable
free paly.
NOTE:
For farther odometer reading, repeat the above maintenance at the period established;
6,000 km (3,800 mi),
intervals.
2- 1
1,000 km 7,000 km 13,000 km 19,000 km 25,000 km 31,000
Remarks
or
1 month
(600 mi) (4,400 mi) (8,200 mi)
if
0
Every 12,000 km (7,600 mi) and
INTERVALS CHARTS
I
I
**1 **2
or or or
7 months 13 months 19 months 25 months 31 months
Every 42,000 km (26,600 mi)
Replace
0 0
0 0
0 0
Every 30,000
I
or or
Replace
0 0 0
Replace
0 0 0
0 0 0
Every
(19,000