(I elected to make this a new post from my previous 6-speed posting) In my opinion my bike has excessive engine speed on the highway: 3500 RPM @ 75 MPH. This is due to only having a 5-speed plus the higher gearing of the MM injection. Later, when funds allow, I will do a 6-speed gear swap. First I would like to replace my 3.37 (24T/37T) primary gearing with a 3.15 (25T/36T) setup from a carb or Delphi King. This should drop the highway cruising speed down a couple-hundred RPM. My clutch and chain are likely getting worn by now anyway so consider this to be a maintenance item. On eBay I found a clutch assembly complete with chain and tensioner off of a 2004 Road King starting at $100. What years will be compatible with my 2001? Anything else I need to look out for?