650H (Maxim)

F. Cylinder

1.    Inspect the cylinder walls for scratches. If vertical scratches are evident, the cylinder wall should be rebored or the cylinder should be replaced.

2.   Measure cylinder wall wear as shown. If wear is excessive, compression pressure will decrease. Rebore the cylinder wall and replace the piston and piston rings. Cylinder wear should be measured at three depths with a cylinder bore gauge. (See illustration.)

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.

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

XJ650LJ and XJ650LK (Turbo)

NOTICE

This manual was written by the XJ Owners Group to replace the composite set of manuals and suppliments offered by Yamaha Motor Company primarily for use by Yamaha dealers and their qualified mechanics.

CHAPTER 2. PERIODIC INSPECTIONS AND ADJUSTMENTS

INTRODUCTION