So yesterday afternoon I had to make a trip and I decided to to take the duke and not hit any highways.

So I'm riding down one of the more open roads in the middle of nowhere through a slight bend at about 80mph. The bike suddenly shut down, rear wheel locked for a split second (thankfully I wasn't in a tighter corner). I noticed the instrument cluster go through the start up sequence (tach sweep like when you first turn the key on) and then it was totally blank. So while rolling down the road with the clutch in I cycled the key a few times as well as the shut off switch with no luck.

So I pull over and notice that when I cycle the key I had relays clicking under the seat but no fuel pump prime and still no speedo.

I checked all the fuses under the seat and found nothing wrong. I unfortunately dropped fuse number 3 and just threw in a spare. Tried the key and the cluster now functions. The bike fired up and I claimed Success! I thought...

So now I notice that the turn signals and horn no longer function. The high/low beam switch works fine and so does the high beam flasher button thing.

I saw some posts about a diode behind the headlight mask for the turn signals so I will check that shortly.

Anyone have anything else to check with limited tools?

I have had very similar problems. With the issue also draining my battery, like a short or something.

I checked my battery connections and earth, rectifier, also got the bike serviced and locks replaced as my bike got nicked again. The shop could find no fault either, but my speedo/dials also began doing strange things; bike idling but clocks saying 6k revs, needle swinging but very laggy, etc.

I replaced my clocks (new type), second hand on ebay for 70 quid, bargain, and all seems well now.

I don't know if it was some electrical problems causing the clocks to malfunction, or the other way around. My old clocks were cracked so they accumulated a lot of moisture in them, which I think was at least a problem.

I had some of these same issues. Very frustrating. When I replaced the battery and regulator rectifier everything was good again.