Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
The tool for front and rear retainer are available off ebay for about £50 the pair. The actual retainers I belive are hard to get hold of, I just saw one on ebay at £25 plus postage and that is in usa. I am afraid I am none the wiser about actually removing the retainer as to date I have never had the bearings fail, despite the milages I covered with a sidecar on my 500/4. I did try when re lining my brake drum, but gave up when welding a 1" section 2 foot bit of scrap on there still didn't budge it, so I just dressed the welds back and left it. I dread having to do the bearings based on that but think I may treat myself to the tool that is on ebay once my finances recover from the pain of getting 2 cars taxed and tested sack bang in the middle of the christmas period, my stupid fault for going soft and deciding to stop using the bike in winter.