Quick question about air filter...

[msb3671]

Hey all. Good Day.

When I replace my stock airbox with a UNI filter, what do I do with the vacuum hose that was going to the airbox?

Thanks!

[Fox]

Are you talking about the tube that comes off the valve cover?

If so, that's the main crankcase vent. It relieves the pressure that builds up inside the engine. You can let it dangle out the bottom (not recommended), you can run it to a catch can to catch the oily water vapor that comes out of there or you can get 4 feet of fuel line, a small hose clamp to hold it on the valve cover tight, a few zip ties and run it up the frame and out the back of the scooter so it vents into the atmosphere. I prefer the last option but a catch can will work too. This guy used a soda can:

[msb3671]

Yep, that's the one. I like the catch can, but not sure which opt I will go with.

Thanks for the info and the great pic. Fox rocks!

Note: Pics are really great for Noobs like myself. I read what you gurus write, but I can't always envision them. Awesome; main reason why this site is soooo cool is all the pics & vids to go with the info.

Rock on, roll on. ;D

Matty

[Fox]

Thanks for the compliment! Glad to help.

The reason you don't want to let it dangle is because it spews out oily water and it'll make the bottom of the engine and the back wheel filthy dirty in no time. Running the tube uphill makes for less spew.

Here's another catch can option:
scootdawg.proboards.com/index.cgi?board=helpfulhowtodoittips&action=display&thread=21954

[90GTVert]

Here's yet another option...

49ccscoot.proboards.com/index.cgi?board=4ttech&action=display&thread=997

[msb3671]

Sweet! Thanks guys! :clap: :rockon: :thumb:

[cyberbeer65]

I used an old pill bottle with the cap drilled.