Ignition System Service Information; Ignition System Specifications; Ignition System Torque Value; Ignition System Tools - Honda TRX450R Service Manual

IGNITION SYSTEM (After '05)
SERVICE INFORMATION
GENERAL
• Some electrical components may be damaged if terminals or connectors are connected or disconnected while the igni-
tion switch is turned to ON and current is present.
• When servicing the ignition system, always follow the steps in the troubleshooting table on page 22-4.
• The ignition timing cannot be adjusted since the ignition control module (ICM) is factory preset.
• The ICM may be damaged if dropped. Also, if the connector is disconnected when current is flowing, the excessive volt-
age may damage the ICM. Always turn the ignition switch to OFF before servicing.
• A faulty ignition system is often related to poor connections. Check those connections before proceeding.
• Make sure the battery is adequately charged. Using the starter motor with a weak battery results in a slower engine
cranking speed as well as no spark at the spark plug (TRX450ER only).
• Use spark plug with the correct heat range. Using spark plug with an incorrect heat range can damage the engine.
• For ignition pulse generator removal/installation, see page 21-11.
• For ignition switch inspection, see page 24-7.
• For engine stop switch inspection, see page 24-7.
SPECIFICATIONS
ITEM
Spark plug Standard
For extended high speed riding
Spark plug gap
Ignition coil primary peak voltage
Exciter coil
peak voltage
High
Low
Ignition pulse generator peak voltage
Ignition timing ("F"mark)
Throttle position sensor resistance (20°C/68°F)
SPECIFICATIONS
IFR7L11 (NGK), VK22PRZ11 (DENSO)
IFR8H11 (NGK), VK24PRZ11 (DENSO)
1.0-1.1 mm (0.039-0.043 in)
100 V minimum
45 V minimum
15 V minimum
0.7 V minimum
11.4° BTDC at idle
4-6 kn
TORQUE VALUE
Timing hole cap
Throttle position sensor
screw
9.8 N-m (1.0 kgfm, 7 Ibf-ft)
3.4 N-m (0.3 kgfm, 2.5 Ibf-ft) Apply locking agent to the threads
TOOLS
IgnitionMate peak voltage tester
MTP07-0286 (U.S.A. only)
Peak voltage adaptor
07HGJ-0020100
(not available in U.S.A.) with com-
mercially available digital
multimeter (impedance 10 MO/DCV
minimum)
22-3