OK.
I have not tried this but I have looked into it in some detail. I can confirm the spline on the belt drive front pulley and the front chain sprockets are the same. The rear pulley will fit to a chain drive sprocket hub. I do believe the rear hubs are interchangeable.
My main reason for not being 100% sure is that the final drive shafts for the B and K models have different part numbers. I don’t know why this is but can’t see why that would cause a problem.
