Dave's Speed Shop

Puke Tank

I needed a new puke tank setup for my crankcase vent. Space is
tight in my OEM frame, so it had to be pretty small. I had some
Delrin slugs in the bin, so I chucked one up in the lathe.

Shallow cuts in Delrin make quite the mess.

I bored out the center with my very crude hand-ground boring bar.

The top was turned with a .002" clearance to the main body and
grooves were cut into both to give the epoxy bond some teeth.

To get a smooth cleanable surface on the drain, I cut the threads
off a brass ball valve.

The top needed a flat for the "IN" port. It comes into a hard
90 degree corner to help separate the oil and air.

A flat bottomed hole and pipe threads finished the "IN" port.

The inside ports were located, drilled, and tapped.

6AN fittings were installed in both ports in the top.

Then a drop tube was installed to further help with oil separation.

To finish the construction, I used high-strength, slow-setting
epoxy to glue the top to the main body of the tank.

The tank mounts in indentations I cut into the swingarm.

A flexible line connects to the crankcase vent for vibration
isolation. And a hard line runs to the breather filter in the tail.

The drain is ready for use.