This is weird, I had the same exact problem with a 696 and switched to motolectric cables and it’s been great since. I used to have to leave it on a tender if I left the bike even for 12 hours overnight between rides.
One thing to check, and I noticed it on my Install—there are two cables that attach to the engine bolt for ground (down near the charcoal canister). When I removed my original cables the system ground wire was under the ground coming directly from the battery. In other words, the battery ground was not the first cable against the engine.
When I installed my wiring, I used the scotch-brite pad that comes with the wiring kit and fully scrubbed that engine area and the new battery ground cable. Then added dielectric grease there and made sure the battery ground was a nice tight fit against the engine first, then I added the second cable on top (with a dab more dielectric grease). Tightened the bolt to the proper torque and buttoned everything up.
I now can start the bike no problem. Even a week off of the tender and it starts immediately. Maybe give that a look?
Well you saved me towing and a paying a mechanic. Embarrassingly I didn't notice the ground lead from the engine harness, all I noticed was the battery ground when I loosened the bolt. It's pretty tight in that area with all the cables and breather hose. Poor lighting doesn't help either. Bike fires up better than ever now. Before the major starting problem I always had the intermittent 0005 problem where it would take 3 times to start the bike that's prevalent with this generation monsters. Only time will tell if that issue will be resolved by the motoelectric cables.
Thank you all for the replies!!!