For a "no spark" problem with a Hyosung RX125, check:
temporarily disconnect the battery. With the engine on at both the ignition switch and engine kill switch, verify that the green wire to the CDI does not measure 0 ohms to ground;
if it does, check the ignition switch and the engine kill switch;
it it measures anywhere between 50 ~ 500 ohms, then reconnect the battery and check that there is +12 on the orange wire going to the CDI with ignition switch on;
for a pulsating voltage (high ACV) at the white / blue wire coming from the CDI going to the ignition coil;
for a pulsating voltage (low ACV, 0.5VAC) at the green wire coming from the pulser coil going to the CDI; and
of course, check if the CDI (black / white) is connected to the ground.
Answers & Comments
Hi and welcome to FixYa,
For a "no spark" problem with a Hyosung RX125, check:
- temporarily disconnect the battery. With the engine on at both the ignition switch and engine kill switch, verify that the green wire to the CDI does not measure 0 ohms to ground;
- if it does, check the ignition switch and the engine kill switch;
- it it measures anywhere between 50 ~ 500 ohms, then reconnect the battery and check that there is +12 on the orange wire going to the CDI with ignition switch on;
- for a pulsating voltage (high ACV) at the white / blue wire coming from the CDI going to the ignition coil;
- for a pulsating voltage (low ACV, 0.5VAC) at the green wire coming from the pulser coil going to the CDI; and
- of course, check if the CDI (black / white) is connected to the ground.
Postback results of tests.Good luck and thank you for using FixYa.