02 FXDWG. I have an intermittent problem with my bike stalling while riding. It's happened twice now. Riding at 60-70 MPH, bike just quits running. Plenty of gas. Seems to be an electrical issue because turning the ignition switch off and back on fixes it. Today I rode about 150 miles. It happened once at around 40 miles. I turned the ignition off and back on while I was still rolling, it fired back up and was fine the rest of the day. Similar situation the last time it happened.

Back around 2010, I had a similar issue caused by a bad ignition switch. In that case, there would be no power to the bike (i.e., dash & lights would shut down). In this case, I still have power to the bike, so I think it's not the switch. I also have had the stator go out (maybe around 2012), which had a similar symptom, but in that case the battery was going dead, obviously, since it wasn't charging. Not happening here now. Maybe related, or maybe not, sometimes when I start the bike, it does a single crank, pregnant pause, then cranks normal and starts... feels kind of like the motor catches on something, then gets over it.

Any guesses on what I should be looking at here? I plan to test the voltage regulator, stator, coil, check for broken or loose wires... what else?

 

 

CKP? Any codes?

 

Bank Angle sensor? If the motor quits, it will start back up as soon as the ignition is cycled.. IIRC there will be a code.. I would also check for loose battery terminals, both ends of the cables.

 

Hadn't thought of the CKP. No codes. No CEL.

 

My '00 WG had the same symptoms you describe but it threw a CKP code, which when replaced fixed the problem. If yours didn't code then you can probably eliminate that as a cause.

 

Not necessarily. I do diag and programming (on cars) all day. I've run into issues with the crank or cam sensors where, for whatever reason, it doesn't throw a code. Seems like especially when it's first starting to fail. Messed up enough to cause a brief problem, but not enough to throw a code.
I've been doing diag on the bike all day today and keep coming up with nothing. Crank sensor & voltage regulator are cheap enough that I'll just go ahead and throw new ones on. It's probably going to be an issue where I just have to ride it until the problem gets bad enough to throw a code or present itself to the point where it can be diaged.

 

Another thing to note is that the bike is carbed.. It may be something as simple as a plugged gas cap vent.. Generally that issue won't kill the motor quickly..

A 2002 probably won't throw a code crank sensor code. The reasons is that from 2001 up, the cam sensor was removed.. It's not needed. The ICM uses crank slowing to determine cam phasing.. If the CKP sensor fails the ICM simply thinks the motor has stalled.

 

Good info. Thanks.