Suzuki Zillion UX50 wont start

[choppedminx]

Hi

Hope someone can help. My sons Suzuki UX50 moped has no spark. There appears to be no power getting to any of the 4 connections on the coil unit (ignition on or off, or whilst cranking) - should there be?

I cant seem to find a workshop manual or a wiring diagram anywhere!

I have checked the igniting sensor (not sure if thats what its called!) with a continuity tester, when the rotor is turned the resistance changes and I get a beep from the tester, so presumably thats OK.

I am starting to pull my hair out, and I have a grumpy teenager giving me earache - help!!

[Guest]

you aren't getting power to the coil.. then go to the part before of the coil, work backwards.... eventually you find power in but not out, and that will tell you what isn't working...

you have checked the main fuse?

and the ignition is on?

and the kill switch is in the run position.?

sounds like Electrical brain / ECU

[choppedminx]

Checked main fuse - OK

Ignition is on

No kill switch

ecu/brain is built in to the coil unit

Am I correct in thinking there shoud be a live feed to the coil unit from the ignition switch when turned on?

[Guest]

would think it is a pulsed live to create the spark.. rather than perm live... would need to spin/fire the starter and check...

[choppedminx]

So, could it be the coil unit??

[Guest]

if its getting power to the coil, but not out, then suspect the coil...

[Gamer]

There is direct link of power from battery, but controlled by ignition switch - funny name is it not ?

Can that coil unit is not mounted correctly - metal to metal (- goes through a frame, + goes by cable)

so you have power - no spark on spark plug?

follow WalneyFrankie advice

check/change - spark plug

check/change - power cable from coil to plug (sometimes they brake inside)

check/change - coil unit

check/change - sometimes just old/rusted power cable connection - was the bike not used for longer?

[choppedminx]

Still having problems. Changed the plug cap and everything seemed OK for about a month.

Now have exactly the same problem, have changed the coil to plug lead, coil unit, and checked all wiring - HELP!!