I like to take old used components and tear them down to mix and match parts to get the best looking component possible. In tearing down a few rear deraillers and sorting through my spare parts to mix and match I found one spring bolt that would not fit with the usual plastic bushing. This is Camy p/n 811/A which they call the "gear spring bolt" and is used p/n 810/1A "lower body bushing".These are the parts that assemble to hold the jockey pulley cage to the parallelogram. This odd bolt seems to fit OK and works fine without the bushing. All the other bolts I have require the bushing. Does anyone know if this is in fact a NR bolt and when it was produced. The markings on all the bolts are identical.
Also is there a preferred position for reassembling the spring? There are two holes to choose from and I assume one position provides more tension than the other. What are the circumstances where the higher tension is prferred?