16. IGNITION SYSTEM

Page 16-0

Component locations

really big verson

color big verson

Page 16-1

SERVICE INFORMATION

WARNING

GENERAL

SPECIFICATIONS

Spark plug
  NGK ND
Standard DPR8EA-9 X24EPR-U9
For cold climate (below 5°C/41°F) DPR7EA-9 X22EPR-U9
For extended high-speed riding DPR9EA-9 X27EPR-U9
Ignition system
ITEMSTANDARDS
Ignition timingInitial (F mark)10° BTDC/idle
Ignition coil
resistance
(20°C/68°F)
Primary circuit 2.2-2.6 Ohm
Secondary circuitWith plug wire30-36 kOhm
Without plug wire20-25 kOhm
Pulse generator coil resistance (20°C/68°F)450-550 Ohm
Firing orderFront - (232°) - Rear (488°) - Front

Tools

Tester
07411-0020000(KOWA Digital type)
KS-AHM-32-003(KOWA Digital type; USA only)
07308-0020001(SANWA Analogue type)
TH-5H(KOWA Analogue type)

Page 16-2

TROUBLESHOOTING

WARNING

No spark at one spark plug

no spark at all plugs

No spark at either spark group (Front or Rear) - (CHECK WRONG SPARK GROUP)

Page 16-3


IGNITION SYSTEM INSPECTION

Remove the seat and rear cowling (page 13-25).

NOTE

Disconnect the spark unit connectors and check them for loose or corroded terminals.

Measure the data between connector terminals using the following chart.

6P CONNECTOR
ITEMTERMINALSSTANDARD (20° C/68°F)
Ignition primary coilY and Bl/W (Rear) Bu/Y and Bl/W (Front)2.2-2.6 Ohm
DC power supply circuit lineBl (+) and G (-), Bu/Y (+) and G (-), Y (+) and G (-) with the
ignition switch "ON" and the engine stop switch "RUN"
Battery voltage should come

4P CONNECTOR
ITEMTERMINALSSTANDARD (20° C/68°F)
Pulse generator coilW/Y and Y (Front) W/Bu and Bu (Rear)450-550 Ohm.
Each terminal and body groundNO CONTINUITY


IGNITION COIL

INSPECTION

Remove the seat and fuel tank (page 13-25).
Measure the primary coil resistance of the front and rear ignition coils.

NOTE

PRIMARY COIL RESISTANCE:
STANDARD: 2.2 - 2.6 Ohm (20°C/68°F)


Disconnect the spark plug caps from the plugs and measure the secondary coil resistance with the spark plug caps in place.

STANDARD: 30-36 kOhm (20°C/68°F)

If the resistance is out of range, remove the spark plug caps and measure the resistance between the secondary coil terminals.

STANDARD: 20-25 kOhm (20°C/68°F)

Page 16-4


PULSE GENERATOR

INSPECTION

NOTE

Remove the seat and rear cowling (page 13-25).
Disconnect the pulse generator 4P connector (WHITE).
Measure the resistances between the white/yellow and yellow wires (front pulse generator) and white/blue and blue wires (rear pulse generator)

STANDARD: 450 - 550 Ohm (20°C/68°F)

For pulse generator replacement, refer to section 8.

IGNITION TIMING

NOTE


Warm up the engine to operating temperature.

WARNING

Remove the timing inspection hole cap on the left crankcase cover.

Connect the timing light to the front spark plug wire.

The timing is correct if the "F" mark aligns with the index mark on the right crankcase cover at idle for each cylinder.

Raise the engine rpm and the "F" mark should begin to rotate counterclockwise for each cylinder.

If the ignition timing is incorrect, make a ignition system inspection (page 16-3) and replace any faulty parts.