I had the same problem with my 14sb. With the lower half of the clutch off, you'll wee a threaded opening in the top half of the clutch. Screw in a long 14mm bolt. It will push against the shaft and work the clutch off. After bending the clutch lever, I realized I had to loosen the engine first to allow the clutch lever to squeeze down through the deck opening.
Jay, July 2008