I’m new to these forums but really hoping someone has an idea about this confussing issue.

03 E-Ton YXL 150 with spark issues.

Sometimes it will start and sometimes it won’t. When it starts, it runs great and does not cut off. Once I cut the atv off, the spark becomes very intermediate and sometimes there no spark at all.

- I have a neutral light
- Brake light switch is bypassed and wires are permanently connected
- resistance is within spec on ignition coil and pick up coil
- i’ve tried another ignition coil and it does the same thing

Whats confussing me:
- when I unplug the stator and pickup coil wire, it still has spark for the first 1-2 seconds of turning over the engine (does the same thing whether the stater wire is connected or not)
- the cdi box is humming or buzzing while Key is on
- when I continuously turn over the engine and rapidly turn Kill switch on/off, the spark intermediately returns.
- seems like it only consistently has spark for the first one or two seconds of turning on the ignition system. After that the spark is intermediate and sporadic. Sometimes there’s no spark at all

any help would be greatly appreciated. I’m leaning towards a CDI problem but I’m not aware of how to diagnose the CDi on an eton with 100% certainty. It looks like the cheapest CDI box I can find is $120. I really don’t want to order just guessing

Thanks for the reply. I wish I could find one of those $20 CDIs. Cheapest one I can find is 130 on eBay . Here’s a picture of the type I have. It has two ground wires coming out of it. If you know of a cheaper one that would work, I love the link. I had a couple cheap Chinese CDI’s laying around and tried them but they don’t work on this bike.