Why does oil blow out the air cleaner on a 2007 harley Davidson electra glide?

Answer 1

Blow-by bad rings

Negative.

Twin cams tend to over pressurize the oil in the rocker boxes, which then vents out to two tubes behind your air cleaner (those two rubber tubes back k there? yup those... The theory is that the intake suction will pull that oil back into the motor and burn/push it through the exhaust... in reality, it leaks all through the air cleaner.

Solution--

Go to auto zone and buy some tubing to vent the excess oil from the heads to a catch can on the lower portion of the bike (you can dump it on the road, but it makes your back end really grimy...) Almost anything will work, but if you want pretty, Jegs makes some little alum or SS cans with breathers and you can use spiffy ss wrapped tubing, all up to you... good luck!!! (PS block off the holes in the back of the air cleaner too, so you wont suck in dirt)