I've been trying to pinpoint the source of this noise which has been driving me nuts. Today, I absent mindedly applied slight pressure to the decomp lever while the engine was running and the noise stopped instantly. When I let it go the ticking/rattling started again. I wasn't engaging the lever, just pulling it in enough to start feeling the loosning and tightening of the cable as the valve bucket moved up and down. The valve are all within spec. So, what gives? Thanks.