Quote:
Originally Posted by Sdmfjon
Will have to check out that tube.
Today I ran it about 10 miles until I hit 100 MI on the odometer. Changed the oil for the third time and put in a new spark plug.
It's definitely some low frequency rattle. It Happens at certain throttle position. I checked the intake and vacuum lines, no appearance of a leak. Checked the exhaust header, no air pushing out or exhaust leak sounds. The exhaust coming out of the muffler is very strong and consistent. The exhaust doesn't smell rich or lean. (unburned fuel smell or the sulfur smell)
I also thought that maybe im over thinking.
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It does sound like the drop tube in the tank that you are describing. It only hits at certain RPMs.
The drop tube is just too close to the edge of the tank and when it vibrates it starts buzzing and making a sound.