hey fellas... about 2 weeks ago , when just gettin out for a ride, when i downshifted, i heard a moaning sound i could feel . it happened 3 times and i never heard it again. been couple hundred miles since. last night same thing. as i down shifted , i haD same noise moaning sound and could feel it . happened twice .rode 40 miles or so and nothin else happened. any ideas? hate to be so vague, but best i can describe. my suspicions have me wanting to pull primary cover ....

