I have a Bandit with the lesser build, which I have been enjoying a bunch. But it seems to have developed a loud pop when applying some force to the crank. Especially when starting from a stop in a higher gear. I thought it was the cassette but seems to more in the area of the bottom bracket. Any suggestions?
Check the main pivot, well all the pivots. I have a buddy whose main pivot always loosens up.
Also - there is a top hat shaped piece of plastic in the GXP bottom bracket (driveside) that can be worn, or come out of place (especially if the crankset has been installed with spacers missing, or otherwise wrong). That would lead to a noticeable clunk in the cranks. Grab those and see if you can feel any slight movement.