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General => Technical | How To => Topic started by: monkeybongos on May 18, 2026, 01:58:33 PM

Title: Troubleshoot Me
Post by: monkeybongos on May 18, 2026, 01:58:33 PM

Scooter stalled during a ride, wouldn’t start back up.
Had been running great.

Two engine codes flashing:  ignition circuit abnormal (been flashing for a couple yrs, scoot running fine so I ignored it)
Oxygen sensor circuit abnormal (just started)

Replaced the o2 sensor about 8000 miles ago.  Time for a new one? First one lasted almost 30,000 miles, replacement was oem.

Search revealed CDI box, stator, or ignition coil could also be the issue.  How to find out which?

Can start by replacing o2 sensor, but at $130 it can be a pricey process of elimination

Title: Re: Troubleshoot Me
Post by: Iahawk on May 18, 2026, 05:06:45 PM

what bike is this happening on? That may help with the diagnosis.

Title: Re: Troubleshoot Me
Post by: Ruffus on May 18, 2026, 06:37:10 PM

MB, start with bread'n butter search

-spark there?
- new plug, cap, cable?
-killswitch?
-fuel comes?
-injection..etc
If this all is healthy then we go further.

Title: Re: Troubleshoot Me
Post by: monkeybongos on May 18, 2026, 08:11:46 PM

Cali Classic 200i, Hawk.

Ruled out of of those, Rufus

Cranks but doesn’t turn over, so no spark I guess