I'm putting this one up for information. I have replaced the head bearings with taper rollers. I have been getting my bearings from Marksman Industrial from as long as I can remember and more recently they are doing these as a kit where in the old days you would have to know the size or number you can now find them by motorcycle categories.. £36 gets you these wee beauties below including two rubber sealed dirt covers. Sizes OD 55mm ID 35mm H14mm (Photo shows 14.5 but that is on the cage)
