there is a check valve in the oil system that is stuck open over filling the oil tank will cause the dipstick to blow out of oiltank
Turn it to the left and unscrew it the pull.
the trans fluid plug is a screw in plug near the oil dipstick. Remove that plug and it will have a dipstick made into it. That is the transmission fluid reservoir.
Auction Kings - 2010 Blow Gun Wooden Harley 2-19 was released on: USA: 25 October 2011
The dipstick on a Harley-Davidson Sportster motorcycle is read by noting the position of the oil in relation to the markings. The oil should be between the full and add marks.
It could be a clogged PVC valve.
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If you mean trans fluid, you pour it in the trans dipstick hole.
On a stock Deluxe the dipstick is part of the oil filler cap.
Engine oil dipstick? Could be the PCV system is inoperative or the engine has excessive blow-by.
I'm not a mechanic / technician but I believe that a plugged PCV valve or hose will cause oil to blow through the engine oil dipstick
Park it on the kick stand engine off, of course. Check the level by removing the dipstick and wiping it clean. Fully reinstall the dipstick and then remove it. The bottom mark is full cold. The top mark is full hot. Do not overfill.