I have a '14 Terra with just a few K of relatively easy (no off-road) miles on the clock, and just recently noticed a knock in the front end. I don't hear or feel it while riding, but when moving the non-running bike, there is now a distinct knock when the fork begins its rebound travel. Doesn't matter how much or how little I first compress the fork; in fact it even emits the knock if I just tug up on the handlebars from an at-rest position. I considered maybe loose steering head bearings, but that doesn't seem right to me; I'd think I'd feel some notchy binding or whatever when riding, and I notice nothing when tugging back and forth on the forks down near the axle. I'm wondering if something is coming loose inside one of the forks; anyone have any experience with this?