Battery acts low after riding ##Update##

[Hydrashok158]

Last year I posted about how my 2023RT would not start back up after a refuel or stop. The battery would seem to be low and unable to sping the motor fast enough to start. It would also throw up random errors on the dash. I would let it sit for a time and then it would fire up and run no issues.
It happened at the dealer when the service guy tried to start it to move it in the bay, so they were a witness. They replaced the battery under warranty. He wanted to go with a lithium battery but needed BMW to concur. Well, it is now spring and hotter in Florida, so it happened again. I have started carrying a jump box with me in case.

Well, the bike is in the shop for this issue. It seems to act as if the battery can't turn the motor after a stop in hot weather. Here is the latest on this issue. The bike will totally black out when hot. It runs fine, the voltages report 14.2 running and 12.2 sitting. If the engine temperature gets to 208F when idling and I turn off the bike, I then turn it on and the dash seems fine until I hit the start button and it just goes black and will stay "dead" until it cools down. It will not even jump start until it cools down.
At least I was able to get the bike to go into failure with the head mechanic standing there and it's under warranty.

[1gewehr]

It sounds like a charging issue. Have you had that checked out?

[Hydrashok158]

Yes, the dealer checked it before replacing the battery. It's an intermittent problem that seems to occur when the weather is warm and I try to restart after a lengthy ride.

[Glenn]

I've had the issue with 2 different R1250RT on the same Saturday a year apart, putting a battery with a higher CCA rating seems to solve it.

[Shdoug]

Last year I posted about how my 2023RT would not start back up after a refuel or stop. The battery would seem to be low and unable to sping the motor fast enough to start. It would also throw up random errors on the dash. I would let it sit for a time and then it would fire up and run no issues.
It happened at the dealer when the service guy tried to start it to move it in the bay, so they were a witness. They replaced the battery under warranty. He wanted to go with a lithium battery but needed BMW to concur. Well, it is now spring and hotter in Florida, so it happened again. I have started carrying a jump box with me in case.

Well, the bike is in the shop for this issue. It seems to act as if the battery can't turn the motor after a stop in hot weather. Here is the latest on this issue. The bike will totally black out when hot. It runs fine, the voltages report 14.2 running and 12.2 sitting. If the engine temperature gets to 208F when idling and I turn off the bike, I then turn it on and the dash seems fine until I hit the start button and it just goes black and will stay "dead" until it cools down. It will not even jump start until it cools down.
At least I was able to get the bike to go into failure with the head mechanic standing there and it's under warranty.

12.2 volts is too low. Should be 12.8 when the engine shuts off. Maybe 12.2 after sitting for a week or more.