For those who are looking to run custom carbs or air filters on your four strokes, you may not know what to do with the breather hose that comes out of your motor and was plumbed into your air box. While you could drill a hole in your air filter and run it into there, that is not what I do.
I made a oil catch can for my motor, and all it is is a small container. I used a Jagermeister shorty bottle, and you drill two holes in the cap. One larger hole for the breather hose to plumb into, and a smaller hole to act as a vent hole.
How does a catch can work?
A catch can works by taking the extra gases and oil mist that get blown out of your breather, and condensing the oil mist in a container, then allowing the extra gases to escape out of the breather hole. There are actually two ways to run a catch can. The way I did mine is I vented it to the atmosphere. The second way is to run a second line from the cap of the catch can and run that into your intake some where. This is how you see catch cans set up on cars most of the time. The vacuum from the intake helps pull the extra gases from your crank case, while the catch can filters out the oil mist.
Why run a catch can?
Running a catch can removes the oil mist that your motor would other wise be ingesting. Ingesting oil mist can lead to excess carbon build up. It can also lead to knocking and pinging in a turbo motor or high compression motor, but that's not a problem with the HS and Preddy motors that most of us use.
While it is your choice how you run your breather, i thought i would show you guys a second option you may or may not have known about.
I made a oil catch can for my motor, and all it is is a small container. I used a Jagermeister shorty bottle, and you drill two holes in the cap. One larger hole for the breather hose to plumb into, and a smaller hole to act as a vent hole.
How does a catch can work?
A catch can works by taking the extra gases and oil mist that get blown out of your breather, and condensing the oil mist in a container, then allowing the extra gases to escape out of the breather hole. There are actually two ways to run a catch can. The way I did mine is I vented it to the atmosphere. The second way is to run a second line from the cap of the catch can and run that into your intake some where. This is how you see catch cans set up on cars most of the time. The vacuum from the intake helps pull the extra gases from your crank case, while the catch can filters out the oil mist.
Why run a catch can?
Running a catch can removes the oil mist that your motor would other wise be ingesting. Ingesting oil mist can lead to excess carbon build up. It can also lead to knocking and pinging in a turbo motor or high compression motor, but that's not a problem with the HS and Preddy motors that most of us use.
While it is your choice how you run your breather, i thought i would show you guys a second option you may or may not have known about.
