I bought a used 26 inch Hatchet which seemed to be in very good shape. However, I noticed something odd on the right side where I could feel and hear a thunk (how to describe it?) every few hundred yards when applying hard pedal pressure. Possibly pedal or the crank interface? I decided to check all the bolts (should have done this before riding) and found that the bearing caps were very, very loose. I tightened those up a bit and the problem seems to be gone.
But that I decided to take off the crank to see if there were any other issues. This was the first time I’ve ever taken off a crank arm where it just slid right off after taking out the bolt. The extractor was only needed to get it started. I thought that perhaps the spacer was too big, so I tried a slightly smaller spacer. But when I put the crank back on, I could not tighten the bolt any further than it was originally and this left a gap to the spacer. I put the original spacer and bolt back in.
Is there a problem with this crank interface? Maybe it’s fine, I just wonder about it since it seems different than all my other unicycles. Should I do anything about it?