The "war stories" in here about signals cancelling too soon or not soon enough matched my experience with an 08 Road King. I disconnected a wire from the TSM and made the signals 100% manual. My 23 King seems to more closely match my use of turn signals and I haven't felt the need to convert to manual....yet. The OP seems to have what should be a warranty adjustment item when he can stop at a dealer, though he hasn't mentioned if he has counted the flashes yet.

 

It flashes seven or eight times before zotzing out.

 

Should have been caught on a pre-delivery check ride. Sounds like no pre-delivery check, but I bet you paid for one. I would have been back the next day and told them they could fix it or keep it.

 

So, I had a chance to check this out on my '24 SG and it works the same as on my '07. The timer does not start until you release the turn signal switch. If you want extra time, just press and hold.