Hi Stuart, welcome to Outdoorking. Deejay is the man for this project, but he is not present right now. To get the show on the road, could you post pictures of your machine please, including its model identification plate, plus pictures of its clutch, and a description of what is wrong with it. It may be fixable with less radical surgery than a new clutch, but this depends on what it is doing, and exactly which SB45 variant it is.
Deejay will probably commence his involvement by splitting your project off as a separate thread, but I'll leave him to make that decision.
