Hello, I recently bought a R 100 R (built in 1992) and there are of course a few small things to do. Basically I know the technology of motorcycles very well and I also passionately like to screw on motorcycles (where I put a lot of value on a clean work) – however this is my first BMW (but was always enthusiastic about the old BMW technology). Since the shock rod seals on the engine block lose oil, I want this erledi I have already read some comments on the internet (it seems to be relatively easy to walk), but I could not find one so far – if I leave the piston with the rings in the cylinder and have to remove the piston bolt to change the O-ring at the cylinder foot – how tight is it normally. Can it be pushed out easily by heating, for example, or a piston bolt printer is required (I don’t want to crook afterwards either). Since I don’t own this imprint (it always worked like that), I would buy it before the repair starts – but of course only if the bolts are normally fixed. I have already looked on the internet and there are hardly any offers. If I need the bolt puller – someone has a tip here, where you can get it cost-effectively (but should already be a little good). Furthermore, I would be interested in where I have the safety rings for the Kolbe nbolzen can buy separately (would not like to use the old fuses). Can you buy these individually? Would be great if you could give me a tip here. MfG Harald