10.19
ELECTRICAL
10
IGNITION SYSTEM
Flywheel Identification
The flywheel can be identified by the stamp mark in location A. Refer to I.D." location in chart below. Do not use the cast mark
to determine flywheel application.
EFI - DC/CDI Ignition Overview
The Sportsman EFI system has incorporated into it's design a DC/ CDI ignition system.
The DC/CDI system relies on battery power for ignition. Instead of generating DC voltage via magnetic induction, a 12 Vdc current
is supplied directly to the ECU from the battery. 12 volt DC current charges an internal capacitor to build up the initial ignition charge.
An A/C signal from the Crank Shaft Position Sensor is processed by the ECU, which determines ignition timing by calculating from
a point pre-determined in the crankshaft rotation. This signal releases the electrical charge which saturates the coil for ignition. DC/
CDI systems have the ability to ignite with as little as 6 volts of power.
Some of the advantages of DC ignition are:
• Stronger, more consistent spark at low rpm for better performance
• Easier starts
• Simpler component design for ease trouble shooting and maintenance
NOTE: DC/CDI systems and components are not interchangeable with any other system.
Engine Application Cast Comment
Kokusan Flywheel 4010912 500 W
Kokusan Flywheel
Timing
Marks
Part Number
Production Date
A
Typical Timing Curve Display
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