BMW has long been a source for exceptionally clean burning vehicles. They make some smaller bikes that are embraced by motorcycle commuters. The F650GS (had one) is one such example. I bought that yeller bike shown above new and have been very pleased. Every BMW motorcycle I've owned came equipped with a robust catalytic converter installed, as well as a nice flat repair kit and detachable touring bags.
Here's the
NA SITE for those interested.
Tailwinds,
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Ron - Tucson, AZ