Honda CBR125R Owner's Manual page 371

SERVICE INFORMATION
GENERAL
• The ECM may be damaged if dropped. Also if the connector is disconnected when current is flowing, the excessive volt-
age may damage the module. Always turn off the ignition switch before servicing.
• Use spark plug of the correct heat range. Using a spark plug with an incorrect heat range can damage the engine.
• When servicing the ignition system, always follow the steps in the troubleshooting table (page 17-4).
• The transistorized ignition system uses an electrically controlled ignition timing system. No adjustments can be made
to the ignition timing.
• Some electrical components may be damaged if terminals or connectors are connected or disconnected while the igni-
tion switch is ON position and current is present.
• A faulty ignition system is often related to poorly connected or corroded connections. Check those connections before
proceeding.
• The ECM varies ignition timing according to the engine speed. The TP sensor signals the ECM to compensate the igni-
tion timing according to the throttle opening.
• 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.
• For CKP sensor service (page 17-6).
• For ECM service (page 5-66).
• Refer to following components informations:
– Diode (page 18-15)
– Ignition switch (page 19-13)
– Engine stop switch (CM and U type) (page 19-14)
– Neutral switch (page 19-17)
– Sidestand switch (page 19-19)
– Clutch switch (page 19-20)
SPECIFICATIONS
Spark plug
Spark plug gap
Ignition coil peak voltage
CKP sensor peak voltage
Ignition timing ("F" mark)
TORQUE VALUE
Timing hole cap
TOOLS
Imrie diagnostic tester (model 625)
or Peak voltage adaptor
07HGJ-0020100
with commercially available digital
multimeter (impedance 10 MΩ/DCV
minimum)
ITEM
Standard
Optional
6.0 N·m (0.6 kgf·m, 4.4 lbf·ft)
Test prove
07ZAJ-RDJA110
IGNITION SYSTEM
SPECIFICATION
CR8E (NGK) or U24ESR-N (DENSO)
CR9E (NGK) or U27ESR-N (DENSO)
0.70 – 0.80 mm (0.028 – 0.031 in)
100 V minimum
0.7 V minimum
8° BTDC at idle
Timing hole wrench
07709-0010001
17-3