Just FYI, the models with the carbon swing arms especially. There is a constant squeaking that occurs with compression of the rear suspension. No matter how much you tighten the bolts, pivots, etc, it never goes away.
I tracked my squeak down to the FIRST disc brake hose guide on the carbon arm. My straight six was new and squeaked all the time. I put a self adhesive piece of fuzzy velcro on the guide before zip tying the hose back down and the squeak went away.
I don't have my straight six anymore but figured this might help some.
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Thread: 4 banger or straight 6 owners