I have a '86 Sporty with a single S&S Super E carb, that once jetted right, is bulletproof. It also has chain drive, so I can do a roadside repair, unlike belt drives that require removal of many more parts to service.

Beemers, with dual Bing carbs, need a deft touch and much love in order to keep running right. I should know, I also have a mid '60s R50/2. Right now I am thinking about doing a oil slinger service. Which is really a lower end rebuild. That's what happens when BMW makes a bike without a oil filter.

The Sporty always starts, and runs great, more than I can say for the Beemer, that only has 21 thousand documented miles.