Are the MC21 cassette gear boxes the same for all models, wet and dry clutch? I fully understand the differences in the cluches but was wondering about the shaft on which the clutch rides. Is this shaft different on wet and dry clutch models? The parts manual shows a difference from the 7L and 7N models but the difference isn't clear in the diagram.

I have a 1993 MC21SE NSR250R9L and want to build a complete spare engine. I have just about everything I need except the gearbox.

Thanks.