Ignition Timing

Engine speed r/min (rpm)	Notch [A] aligns with:
1500 and below	F mark [B] on alternator rotor

NOTE

ODo not mix up the ignition timing marks with the top mark "T" [C].

• If the ignition timing is incorrect, inspect the IC igniter and the crankshaft sensor.

Spark Plug Removal/Installation

• Refer to the Spark Plug Replacement in Replacement Parts in the Periodic Maintenance chapter.

Spark Plug Gap Inspection

• Refer to the Spark Plug Gap Inspection in the Periodic Maintenance chapter.

ELECTRICAL SYSTEM 16-37

Ignition System

IC Igniter Removal

• Remove the seat (see Seat Removal in the Frame chap­ter).

• Slide the rubber IC igniter cover [A].

• Disconnect the IC igniter connectors [B], and remove the igniter [C].

IC Igniter Inspection

Caution

When inspecting the IC igniter [A], observe the fol­lowing to avoid damage to the IC Igniter. Do not disconnect the IC igniter with the ignition switch on. This may damage the IC igniter. Do not disconnect the battery leads while the en­gine is running. This may damage the IC igniter.

• To examine the condition of the igniter, connect the igniter checker to the igniter as shown.

Special Tools-Igniter Checker Set: 57001-1378 [A]

Wiring Harness Adapter, #14: 57001-1381 [C]

IC Igniter [B] Battery [D] OSet the select knob to position “A”.

NOTE

OFollow the instructions in the manufacturer’s operation manual for the proper procedure for operating the ig­niter checker.

OThe igniter checker can perform inspections by simu­lating the following dynamic characteristics: the igniter response in relating to the engine speed, interlock cir­cuit signals, tachometer signals, and engine overspeed limiter signals.

OThe igniter checker cannot be used for inspecting the conditions of the CDI unit.

• If the igniter is defective, replace it.

Ic Igniter Operation Voltage Check

• Remove the seat (see Seat Removal in the Frame chap­ ter).

Disconnect the IC igniter connector [A].

16-38 ELECTRICAL SYSTEM

Ignition System

• Set the Hand Tester [A] to the × 25 V DC range, and connect it to the connector come from harness side as follows.

Tester (+) terminal [B] —► BR/W lead Tester (-) terminal [C] —► BK/Y lead

Special Tool - Hand Tester: 57001-1394

Needle Adapter Set: 57001-1457

• Turn the ignition switch on , and read the voltage.

Ic Igniter Operation Voltage: Battery Voltage

• If the tester reading is not specified one, check the battery voltage, ignition switch and ignition fuse.

Starter Button Operation Check

• Remove the seats (see Seat Removal in the Frame chap­ter).

• Set the Hand Tester [A] to the × 25 V DC range, connect it to the IC igniter [B] lead as follows.

Hand Tester (+) Terminal [C] —► BK/R Lead Hand Tester (-) Terminal [D] —► Frame Ground

Special Tool - Hand Tester: 57001-1394

Needle Adapter Set: 57001-1457

• Turn the ignition switch on and push the starter button.

• Read the voltage.

Starter Button Voltage: Battery Voltage

• If the tester reading is not specified one, replace the IC igniter.