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Author Topic: PPI for UNI foam - 74 CB360 stock air boxes  (Read 211 times)

Offline huck_finn

  • Posts: 67
PPI for UNI foam - 74 CB360 stock air boxes
« on: Jul 17, 2017, 18:50:59 »
I finally found a pair of stock air boxes (with filters) for my 74 cb360. The paper is shot, so I was planning on cutting/fitting some UNI foam to them. Does anybody know of a particular PPI that works well?

And if anybody knows a good way to seal the connection between the air box and battery box, I would love to know how you did it.

Offline runmikeyrun

  • Posts: 386
PPI for UNI foam - 74 CB360 stock air boxes
« Reply #1 on: Jul 31, 2017, 03:10:21 »
I ordered a sheet of uni foam filter media, removed the paper element, then cut the foam into a long strip that fits in place of the paper.  I cut it a touch wide and long so it's a bit of a squeeze to get it in there; that way I don't have to worry about it shifting or sliding out, or any air gaps along the edges where dirt can sneak past.

I have not actually used my filters yet, I'm still in the process of building the bike.  However I have used the foam in another bike to replace a bad paper element.  Wrapped it around the metal screen and voila.  Has worked fine for a couple thousand miles now.  Just don't forget to oil the foam first!


Here's where I list all my bikes:
'71 Kaw 250 Bison
'81 KZ750 cafe
'94 XR250L
2014 Yamaha Bolt

In progress: '68 CL350
END OF LINE.

Live to ride, Ride or die.

Past:
Rupp Minibike
Benelli Minibike
Tomos Moped (lol)
74 RD250
81 XT125
76 KH400
79 YZ250
77 RD400

Present:
14 Yamaha Bolt
81 KZ750E
94 XR250L
68 CL350 (in process)

Yeah, it's dangerous.  That's why I like it.

Offline huck_finn

  • Posts: 67
Re: PPI for UNI foam - 74 CB360 stock air boxes
« Reply #2 on: Jul 31, 2017, 15:59:09 »
I ordered some that is rated at 65 PPI - I will see how it goes. I am hoping that I don't have to re-jet or adjust the floats.