I took a pair of WHEELS bikes out on the Santa Cruise at the weekend, myself on my Expert and the wife on my Pro. The Expert hadn't really done much work since I built it, and twice during the ride after a brief freewheeling interlude there was zero drive when I spun the pedals.... only for half a rotation or so, but it shat me right up both times as it was so unexpected.
Is the freewheel knackered or is something just sticking through a lack of use?