Good Morning from the USA.  My arthritis has become so painful that i sold my K1600.  (pics can be sent upon request) I have a Wheel Balance for sale if anyone is interested.  $150 plus you pay the shipping fee from SW USA.  I also have a complete K1600 Clutch assembly that I purchased from a wrecked 2019 with 7000 usa miles on it but never needed it.  Fits all years BMW k1600 $350  BRAND NEW unopened Battery is a YUASA AGM YT19BL-BS with separate acid to add anytime you are ready to activate the battery. They last about 5-7 years. $120 on Amazon. $100 OBO. THIS BATTERY FITS MANY BIKES INCLUDING harley, yamaha, suziki, honda.  I enjoyed my K1600GTL for over 10 years.  Had lots of fun together.  I kept my GS911 for my new BMW C650 scooter.