I have a 2016 Low Rider S, and it seems like every time I ride two-up, I get an issue with the speedometer cutting out, a bunch of error lights and then a speedo sweep. I've tried tightening the battery posts, and I know the battery is fine because it's brand new.

Is there a weight sensor or angle indicator that could be tripping causing the issues or what else could I be looking at?

 

What are the codes you're getting?

To me it sounds like a loose wire or something getting pulled or pushed enough to lose connection when the weight of a passenger is on your bike. Does the bike stay running like normal when it happens?

 

Yeah, it runs fine, and it's only the speedo, because all my ECU signals are good because everything works perfectly on my power vision.

 

When you tightened the battery posts did you also check the other ends of the cables?

 

Do you have a wire loom under rear fender that has scrubbed tire?

 

Just how heavy is your rider for you to ask that?. Better not let her see that text.

Make sure your speedometer plug is reset.

 

I would put money on something screwing up the CAN bus. You'll need to extract codes.. If on the speedo has issues, it's likely between the ECU / BCM and the Speedo.

Add:
Maybe a pinched wire under the seat?