650J (Maxim)

Proper periodic maintenance is important. Especially important are the maintenance services
related to emissions control. These controls not only function to ensure cleaner air but
are also vital to proper engine operation and maximum performance. In the following tables
of periodic maintenance, the services related to emissions control are grouped separately.

Periodic maintenance emission control system

J. Oil Pump

1. Check the clearance between housing and outer rotor.

2. Check the clearance between outer rotor and inner rotor.

6. Middle gear (installation only, refer to page 67 for the middle gear adjustment)

a. Install the middle drive gear assembly with the proper size of shim(s) and secure it with the bearing retainers and new "TORX" screws.

Tightening torque: 2.5 m-kg (18 ft-lb)

1. Shims

J. Crankcase Disassembly

1. Remove the upper crankcase bolts, starting the highest numbered bolt. Turn over the engine and remove the lower crankcase bolts,

XJ650

CRANKCASE TORQUE SEQUENCE

UPPER CASE

LOWERCASE

SIGNAL SYSTEM

A. Circuit Diagram

Above circuit diagram shows only signal circuit in wiring diagram.

B. Signal System Tests and Checks

YAMAHA

XJ650J/K

Service Manual

Note:
A separate manual covers the European and Australian versions of this model.

NOTICE

CHAPTER 2. PERIODIC INSPECTIONS AND ADJUSTMENTS

INTRODUCTION

CHAPTER 3. ENGINE OVERHAULING