Ignition System; Spark Plug - Sym ATTILA RS-21 EFi 150 Service Manual

2. Maintenance Information

Ignition System

Ignition Timing
Caution
C.D.I ignition system is set by manufacturer
so it can not be adjusted.
Ignition timing check procedure is for
checking whether CDI function is in normal or
Remove right side cover.
Remove ignition timing hole cap located on the
cooling fan cap.
Connect tachometer and ignition lamp.
Start engine and set engine idle speed in 1600
rpm, and if the mark aligns with the "F", then it
means that ignition timing is correct.
Increase engine speed to 8000 rpm to check
ignition timing advance. If the detent aligns with
advance mark "‫ ,"װ‬then it means ignition timing
advance is in functional.
If not, check CDI set, pulse flywheel, and pulse
generator. Replace these components if
malfunction of these parts are found.

Spark Plug

Appointed spark plug¡ G CR8E (NGK)
Remove trunk.
Remove central cover.
Remove spark plug cap.
Clean dirt around the spark plug hole.
Remove spark plug.
Measure spark plug gap.
Spark plug gap: 0.8 mm
Carefully bend ground electrode of the plug to
adjust the gap if necessary.
Hold spark plug washer and install the spark plug
by screwing it. Tighten the plug by turning 1/2
turn more with plug socket after installed.
Torque value: 1.0~1.2 kgf-m
Connect spark plug cap.
2-8
This chapter Contents
Ignition
lamp
Spark plug
Side electrode
Central electrode
0.8mm
F mark