Honda CRF50F 2004-2015 Service Manual page 194

IGNITION SYSTEM INSPECTION
• If there is no spark at plug, check all connections
for loese o r poor contact before measu r ing each
peak voltage.
• Use recommended digital multi meter o r com-
mercially available digital multimeter with an
impedance of 10 MruDCV minimum.
• The display value differs depending upon the
internal impedance of the m u lti met er.
• If using peak voltage tester (U.S.A. only), follow
the manufacturer's operating instructions.
IGNITION SYSTEM
DIGITA L MULT1METER
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Connect the peak vol t age adaptor to the digital
multimeter, o r use the peak volta g e tester (U.S.A.
only).
PEAK VOLTAGE ADAPTOR
TOOLS:
Peak volta ge tester
Peak voltage adaptor
MTP07-0286
(U.S.A . only) or
07HGJ-0020100
(Not available in
U.S.A .)
with commercia lly available digital multimeter
(impedance 10 MQ/DCV minimum)
IGNITION COIL PRIMARY PEAK VOLTAGE
• Check all system connections before inspection.
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If the system is disconnected, incorrect peak volt-
age might be measured.
• Check cylinder compression and check that the
spark plug i s installed correctly.
Disconnect the spark plug cap from the spa rk plug.
Connect a known good spark plug to the spark plug
cap and ground the spark plug to the cylinder head
as done in a spark test.
With the ignition coil primary wire connected, con-
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nect the peak voltage adaptor or peak voltage tester If
to probes to the ignition coil primary wire terminal
[QJ
and ground.
CONNECTION:
Black/ yellow tenninal (-) - Body ground (+)
Turn the ignition switch ON and engine stop switch
to "RUN".
Shift the transmission into neutral.
Crank the engine with kickstarter and read ignition
coil primary peak voltage.
PEAK VOLTAGE: 100 V minimum
If the peak vol tage is abnormal, follow the checks
described in the t roubleshooting chart (page 14-4).
••
1+)
14-5