Seems it is always something new. Had the trike out today, and warmer out than it has been. Stopped at a stop light, in first gear, running normally. But, several times, I heard a clunk-clunk while just sitting there. Drove until the next stop light, and it did it again. 2012 with about 8200 miles. I've never had it do this before. Does anyone know what this noise might be, and should I have it looked at? Thanks for any help you can provide. ---Tim---