Diagnosing Chain Slap

"Patrick" <[email hidden]> wrote in message
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Quoted message said:

I'm having a pretty bad chain slap problem on my MTB. I know some slap is normal on rough terrain,
but on my bike it's a lot more than normal (judging from the clinking noise I make riding next to
my buddies whose bikes are nearly silent in comparison). The chain is sized properly, so I know
that's not the cause. Could the derailleur be contributing? Perhaps the cage is too long? Or the
springs weak? I'm out of ideas, and patience! Suggestions?

The couple of times that happened to me were an indication that my freehub fixing bold had sheared
and things were being held together only with the skewer. When I was coasting, the cassette/hub
would rotate slightly, slacking the chain.

Quoted message said:

The couple of times that happened to me were an indication that my freehub fixing bold had sheared
and things were being held together only with the skewer. When I was coasting, the cassette/hub
would rotate slightly, slacking the chain.

Yes, that's probably a contributing factor - poor cassette movement. I posted a couple weeks ago
about the problem; I'm riding a pretty new set of King hubs, and they're subject to a rather long 60
hour break-in period during which the owner's manual advises there may be slight binding of the
cassette when coasting/backpedaling. The binding is much better than it was a few weeks ago thanks
to a few epic half-day rides upping the hours on the hubs, but the chain slap problem hasn't abated
noticeably.