Bonneville America Forums Forums Technical Forums Performance Mods HELP! question about air filter mods?

Ok so i ordered the uni pods and jets...but what do i do about the hose that ran from the bottom of the airbox to transmission? whats it for?

It's the crankcase ventilation. There are little filters you can put on it. Look in the lower left of this pic:



I don't know who sells these separately. someone will chime in!

I had bought one for my car from Advanced Auto. It was an off namebrand but they should have something, just ask for a crankcase breather filter.

Just route the hose and cut it and zip tie it so it breathes onto the chain somewhere. Free chain oiler. No need for the little filter thingies other then EPA regs. Me, I'm doing my small part to support global warming - I want winter to go away forever.

Emgo makes the chrome ones but they tend to fall apart you can get the plain black ones in most auto stores and maybe even Small Fart (Wally World)

cool thanks guys! so its not bad if i leave it open to oil my chain? couldnt dirt come back up the hose, no?

You can do that. Old Triumphs used to do that right from the factory. I would take a piece of that super course stainless steel wool pot scrubber stuff and put some in the end of the hose with a cotter pin above and below it through the hose

>Emgo makes the chrome ones but they tend to fall apart

This is 'cause they come out with the allen screws that hold them together finger tight.
Add loctite & tighten 'em up & they're ok.
They're available from Belacorse, JCW, & others.

thanks guys...just waiting for my jets and pods to come in. I got the uni pods. 155 mains. 45 pilots. and some shims just in case. thanks Dog.

Keep in mind like I told you before, Jetting greatly depends on your elevation. Like I said those are the jets I am running at 1,800' above sea level. Your altitude may mean different jets. Plus like I said the 155 will probably be a little rich for you I run K&N pods , no air box.

I did the jetting calulator...came out about right...and they said the K&N are the same air flow as the uni pods...with no air box... I got open pipes too soo...shoiuld be close enough, right?

yes but be sure to check your plugs for color and adjust accordingly. I said that because I forgot you were using pods when I saw uni I thought stock air box.

yea i hear u...Uni just started recently making pods.