On my old Bonnie with kick start, I'd pull in the clutch and kick it through a couple of times, to "clear" the clutch plates, very similar to Tom's suggestion. It works....

'05 TBA, Freak/152.5 mains/48 pilots/Gutted Shotguns/AI/Custom rear hangers-Chain Guard/Sport signals/Ness Mirrors/Kury pegs/Driver's Backrest/LOTS OF CHROME!