With a 50" wheel base and proper trail angle of the head coupled with a Felt springer fork. Very comfortable at speed {35mph} and not wound out. The Brookes B190 saddle which went in and out of production is a huge asset to riding comfort.
Maintenance ? Modest I would say. Quality components lend them selves to trouble free riding. The SF80 engine mount allows for slack take up # 35 Diamond brand chain with minimal effort, and quality chain yields minimally. So goes for the #41 final drive chain.
Chain lube is experimental, but so far results a good. My Crock Pot chain treatment is,
https://moltenspeedwax.com/
Tom