Ignition Timing - Honda CBR650F Service Manual

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Turn the ignition switch OFF.
Disconnect the CKP sensor 2P (Black) connector [1].
Connect the peak voltage adaptor or Imrie tester
probes to the 2P (Black) connector terminals of the
CKP sensor side.
CONNECTION: Yellow (+) – White/yellow (–)
In the same manner as at the ECM 33P connectors,
measure the peak voltage and compare it to the voltage
measured at the ECM 33P connectors.
• If the peak voltage measured at the ECM is
abnormal and the one measured at the CKP sensor
is normal, the wire harness has an open or short
circuit or loose connection.
• If the peak voltage of the CKP sensor side is lower
than standard value, follow the checks described in
the troubleshooting table (page 5-3).
For CKP sensor replacement (page 5-8).
Install the removed parts in the reverse order of
removal.

IGNITION TIMING

• The ignition timing cannot be adjusted since the
ECM is factory preset.
Remove the following:
– Left middle cowl (page 2-10) (CBR650F/FA)
– Left tank shroud B (page 2-11) (CB650F/FA)
Start the engine, warm it up to normal operating
temperature and stop it.
Stop the engine and remove the timing hole cap.
Connect the timing light [1] to the No.1 spark plug wire.
Read the
instructions for
Start the engine and let it idle.
timing light
operation. IDLE SPEED: 1,250 ± 100 min
The ignition timing is correct if the "F" mark [1] on the
primary drive gear aligns with the index notch [2] in the
right crankcase cover.
Coat a new O-ring with engine oil and install it into the
groove in the timing hole cap.
Apply grease to the threads of the timing hole cap and
install it.
Tighten the timing hole cap to the specified torque.
TORQUE: 18 N·m (1.8 kgf·m, 13 lbf·ft)
Remove the timing light.
Install the removed parts in the reverse order of
removal.
[1]
[1]
-1
(rpm)
IGNITION SYSTEM
[1]
[2]
5-7