I think all of the Italjet Betor forks used the white plastic bottom bits but the rest of the damper rods were the same as all the late Bultaco ones that I have seen. They all had the same size bolts in them as well. 8mm x 1.25 thread. Scot, those rubbers look like they should work fine. Might I enquire why you have two bolt holes in your petrol tank? Was the tank melting on the exhaust? Graham.