Ignition System Service Information; Ignition System Tools - Honda 2003 NPS50 Ruckus Service Manual

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SERVICE INFORMATION
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GENERAL
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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.
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When servicing the ignition system, always follow the steps in the troubleshooting sequence on (page 17-4).
The ignition timing cannot be adjusted since the Engine Control Module (ECM) is factory preset.
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The ECM may be damaged if dropped. Also, if the connector is disconnected when current is flowing, the excessive
voltage may damage the ECM. Always turn the ignition switch to OFF before servicing.
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A faulty ignition system is often related to poorly connected or corroded connectors. Check those connections before
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proceeding.
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Although the engine control module is controlling ignition timing according to engine speed, ignition timing is assisted
also with the signal from the throttle position sensor and ECT sensor.
Use a spark plug of the correct heat range. Using a spark plug with an incorrect heat range can damage the engine.
For i g n ition switch and ECT sensor inspection, refer to page 1 9-20 and page 19-15.
For ignition pulse generator (alternator stator) removal/installation, refer to page 1 2-4.
SPECIFICATION
Spark plug Standard
('03 - '05
For cold climate (below 5 'C/41 'F)
model)
For extended high speed riding
Spark plug Standard
(After '05
For cold climate (below 5 'C/41 'F)
model)
For extended high speed riding
Spark plug gap
Ignition coil peak voltage
Ignition pulse generator peak voltage
Ignition timing ("F" mark)
Throttle position sensor
TOOLS
Peak voltage adaptor
07HGJ-0020100
with commercially available digital
multimeter (impedance 10 MQ/DCV
minimum)
ITEM
Resistance (20 'C/68 'F)
Input voltage
Ignition Mate peak voltage tester
(U.S.A. only)
IGNITION SYSTEM
SPECIFICATIONS
CR8EH-9 ( N G K), U24FER9 (DENSO)
CR7EH-9 ( N G K), U22FER9 (DENSO)
CR9EH-9 (NGK), U27FER9 (DENSO)
CR8EH-9 (NGK)
CR7EH-9 ( N G K)
CR9EH-9 (NGK)
0.80 - 0.90 m m (0.031 - 0.035 in)
80 V minimum
v
0.7 V minimum
10'BTDC at 2,000 rpm
4 - 6kQ
4.7 5.3
1 7-3