The BMW K models have a single sided swing arm, with a wheel Bevel Box. The single arm also houses the prop shaft. A neater mechanical solution at the wheel, but then you have the issue of the prop shaft angles (or just ignore it and plough it through the seat).
The K Bevel Box did have a habit of stripping its teeth needing replacement (even big manufacturers get it wrong)
The Honda GL1800 also use a single sided swing arm and wheel bevel box (as Larsen uses) and these are much more reliable, but again have the prop shaft issue.
Yes I remember on the K1 I had years ago. On the negative side you have greater unsprung weight though and that weird rise 8n suspension when you accelerate, unless you have a floating BB with torque reaction back to frame.
Richard
2018 Roadster 3.7 1966 Land Rover S2a 88 2024 Royal Enfield Guerrilla 450 1945 Guzzi Airone