Honda NU50 User Manual

TECHNICAL FEATURES
~HONDA
~ NU50· NU50M
IGNITION SWITCH
ON
ALTERNATOR
SPARK
PLUG
l
IGNITION COIL
seR
I
e I
C.D.I. UNIT
--,
I
o
GATE
CIRCUIT
I
Jf-'=
PRIMARY COIL SECONDARY COIL
OFrF_f--_
PULSE A
COIL
EXCITER COIL
,
,
OPERATION
•
A.C. voltage is induced when the rotor magnets pass the eKeiter coi1. The pmitive half of the A.C. wave passes through the C.,
uni' diode 0 to charge the condenser C.
The condenser cannot discharge through the magneto because the diode allows current to pass in one direction only.
Alternating current induced in the pulse coil is used to open and close the C.D.I, unit electronic switch {SeAl through the gage
circuit (the SeA and gate circuit are more complex than shown!. The magneto charges the condenser with the SeR open, The
condenser
is grounded through the SeR when the SeA closes, The condenser then discharges through the ignition coil primary
windings, causing a rapid mllgnetic field build up. High Voltage is then induced in the coil's secondary windings which flows
through the spark plug and jumps the
gap clIusing a spark.
14-2
154
Date of Issue: Nov., 1981
© HONDA MOTOA CO., lTD.

Honda NU50 Specifications

General

Model	NU50
Category	Scooter
Ignition	CDI
Transmission	Automatic
Final Drive	Belt
Front Brake	Drum
Rear Brake	Drum
Front Tire	2.50-10
Rear Tire	2.50-10
Starting System	Kick start
Rear Suspension	Unit swing
Fuel Capacity	4.5 L