Oil from head to air collector in 4age when drifting left.

[jondee86]

Discharging oil into the intake requires two things... sustained high
rpm to pump a lot of oil up into the cam covers, and a long, high speed
left turn. This "centrifuges" the excess oil over to the right of the head
where the crankcase vent is located. It is then blown out the vent tube,
and finds its way into the air intake.

Usually only a problem with the TVIS bigport motors, as smallport and
later motors had better oil drains from the head.

The tube that you see entering the side of the plenum is channeled
internally up a duct that vents into the intake just in front of the throttle
butterfly. Some will get sucked into the engine to make smoke Some
will drain down to the filter.

Google "Cusco" or "Greddy" and "catch can" to see two examples of a
universal sealed can. There are other cheaper ones around, available
from auto parts supermarkets.

Cheers... jondee86