spent a lifetime machining up the 2 main pulleys, crappy phone pics coz my camera got wet on a run last weekend sorry
blank pulleys from the bearing shop with just a pilot hole. machined the teeth off a couple of sprockets so i could keep the taper part [steel was hard as hell, my little lathe was only just up to it - the neighbors loved me doing that job...]. then a fit into the back of the pulleys for them, large main bore for nut, then the other end for a bearing and milled out for puller bolt clearance
