[Closed] Chain suck after installing new KMC chain - help!

Yesterday I fitted a brand new KMC X9-L chain onto my drivetrain before going on a ride. While the chain ran incredibly quietly and shifted smoothly, around 5 miles into the ride I began experiencing problems with chain suck. This would always happen when in the small chainring and in one of the lower gears on the cassette (i.e. the larger sprockets). The problem was worst under heavy load on climbs. I thought that the problem may be associated with the very sticky nature of KMC factory lube, so I applied some Finish Line Wet lube over it during the ride. This made the problem much worse!!! I began experiencing chain such every 2-3 pedal strokes on climbs, forcing me to use my middle chainring. However, by the end of the ride (some 30 miles) the problem almost disappeared.

Here’s some additional info:

- I was using a brand new KMC-X9 silver chain, which I installed with only the factory lube applied. The chain suck did not occur on any one part of the chain in particular.
- The remainder of my drivetrain (cassette and chainrings) is almost brand new, with less than 200 miles on it. The KMC chain replaced a 9-speed XT chain I had on before (installed at the same time as cassette and chainrings), as it snapped 2-3 times on previous rides. I did not experience chain suck with the previous chain.
- The chain suck always occurred on the same part of the small chainring. The chainring is of the Shimano SLX 9-speed variety. There are no visible imperfections on any of the teeth.
- Not sure that it matters, but the bike is a 2008 Orange P7, size large.

Will degreasing and re-lubing the chain resolve the problem? Do KMC chains require a ‘wearing in’ period before they reach optimum performance (perhaps that’s why the problem almost went away towards the end of the ride)? Could it be a more deep-rooted problem?

Thanks!