Finished install of Ohlins shock on my Classic, a huge improvement and highly recommended. A couple of things to look for. First when comparing the Ohlins with the OEM shock, the upper rod U-fitting that the mounting bolt goes through, is wider. The OEM bolt is too short to engage the full OEM nut depth / threads. You might consider using a M10x1.5m thread x 50mm long button head bolt. Second the lower shock mounting fitting is larger than the OEM (see picture). This causes the fitting to bind on the cast swing arm in several places (see pictures). I used a Dremel to clearance ever so slightly (go slow) so the shock is free to move without binding on the swing arm. The OEM lower mounting bolt works, but you cannot get the OEM washer / spacer in as the Ohlins bushing is slightly thicker than OEM. You don’t need the washer / spacer. Cheers!