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Have you been in a French city of late? I almost couldn't visit Tours-centre because of all the diesel smell a few years ago. It has improved slightly in the

• newnewpdro 7y ago
  When I visited Paris, around 7 years ago, it was by far 2-stroke exhaust that was the problem. My Parisian coworkers, who also rode motorbikes, explained it was because the licensing and vehicle taxes are tiered by displacement. So everyone gets a small displacement 2-stroke, since a 2-stroke makes power equal to a 4-stroke double the displacement. I haven't checked to see if this has changed since then.