Just a thought; are you just doing a short press to switch the bike on. Just press and release - don't hold it down at all.
I keep the main key fob in an outer pocket and use it for the SatNav and cases. Saves having two keys. Plastic spare goes hidden about my person on longer trips.
I keep the main key fob in an outer pocket and use it for the SatNav and cases. Saves having two keys. Plastic spare goes hidden about my person on longer trips.

, cost me from memory about £20, this is a genuine bmw key, same key that's used for normal keyed ignition bikes I'm guessing, speak to nick at Cotswold, because from memory now I think about it, I'm sure he said something about bmw being a bit funny about releasing keys to start with, but after discussions with em they agreed to supply(Cotswold anyway) because of people wanting to avoid the above issues