My exercise bike has a one-way clutch that resembles a roller bearing. The problem is that sometimes when the clutch engages it makes a loud pop as it slips a bit. What is the proper way to clean and lube? the rollers? There is a oily/greasy looking substance on the rollers and clutch surface (hardened steel).
When the pedal crank is turned, the clutch engages to turn the resistance flywheel. Uneven pedalling causes the clutch to engage/disengage repeatedly, sometimes with a loud pop. When it engages and then pedal pressure is increased, it may slip a tiny bit, causing the pop as it re-engages. When you stop turning the pedal crank, the flywheel coasts to a stop. There are no other unusual noises (grinding, scraping, etc.)
The clutch surface is smooth and shiny. What I can see of the rollers looks good as well.