you have to take the engine off to get the clutch shaft off, there is no other way, there is about a 1 cm gap between the engine shaft and the clutch shaft, so there is no way that you can undo the clutch housing to remove it.
you also have to undo the small housing that attaches to the end of the cluctch shaft, the one that wont slide either way, as there is a bearing in there that is pretty much sealed to the shaft.
so undo the engine, and teh clutch housing and every thing will slide stright out no problems
