The only reason I had a garage to do the 18k service was not having to invest in the required equipment to vacuum fill the system. I have done around 500 miles since the service and there are no signs of overheating
I like to carry out my own sevicing and over the last weekend I have changed the final drive oil seal and greased up the splines. The cooling system on the K1300, I feel, is barely adequate with a small low slung radiator and only a 2 litre capacity. The bike was designed to warm up quickly, which it does, but the radiator fins are far too fine and prone to corrosion. As mentioned in a previous post, I had an early K1600 that was cursed with overheating.
Unfortunately, one of the things that you have to accept when owning a K.