Author Topic: CB350F Airbox  (Read 3161 times)

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Offline snarferer

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CB350F Airbox
« on: May 07, 2008, 03:39:22 PM »
I'm restoring my '73 CB350F and the airbox keeps slipping off the carbs (particularly number 2 and 3)  I fix it up, get all the clamps as tight as they'll go, and then as soon as i even move the bike, they pop right off.  Any tips on fixing this?

Offline keiths

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Re: CB350F Airbox
« Reply #1 on: May 07, 2008, 05:28:17 PM »
I've always had the opposite problem.
Have you tried loosening the screw that holds the air box to the filter housing? You will need a long Phillips to get at it. Maybe someone pushed it back and never moved it forward again.

Offline 333

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Re: CB350F Airbox
« Reply #2 on: May 07, 2008, 05:31:47 PM »
Is the other end of the tube all the way into the airbox?  If not, it will pull off the carbs easily.
Go metric, every inch of the way!

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Offline snarferer

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Re: CB350F Airbox
« Reply #3 on: May 07, 2008, 05:50:14 PM »
I had this problem with the tank off as well.  The airbox is all the way into the filter, and there's nothing other than a sliding tube holding the airbox to the filter box.

Also adding air filters right on the carbs would fix the situation, but would it cause others?
as from another post?  (I realize its from a 550, just asking if it can be done with a 350/what are the potential problems)
« Last Edit: May 07, 2008, 05:57:12 PM by snarferer »

Offline heffay

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Re: CB350F Airbox
« Reply #4 on: May 07, 2008, 08:12:27 PM »
I had this problem with the tank off as well.  The airbox is all the way into the filter, and there's nothing other than a sliding tube holding the airbox to the filter box.

Also adding air filters right on the carbs would fix the situation, but would it cause others?
as from another post?  (I realize its from a 550, just asking if it can be done with a 350/what are the potential problems)

jetting nightmares... or, as i like to think of them, all night PBR binges.   ;D
Today: '73 cb350f, '96 Ducati 900 Supersport
Past Rides: '72 tc125, '94 cbr600f2, '76 rd400, '89 ex500, '93 KTM-125exc, '92 zx7r, '93 Banshee, '83 ATC250R, 77/75 cb400f

Offline mattcb350f

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Re: CB350F Airbox
« Reply #5 on: May 08, 2008, 12:06:01 PM »
The four rubber pipes attached to the plastic airbox have a slight bend to them. If they are twisted upside down than they might be hard to keep on. There is a little rubber "nub" on these rubbers which should line up with a dot on the plastic box which indicates up. I don't have a pic, but if you look you'll see what I mean.

 Matt.
1974 CB350F,  1980 CB125S,  1981 XL80S
Non Honda's: 86 & 87 Husqvarna 400wr's

My CB350F resto: http://forums.sohc4.net/index.php?topic=30467.0
Gallery at:
http://gallery.sohc4.net/main.php?g2_itemId=298318

Offline snarferer

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Re: CB350F Airbox
« Reply #6 on: May 11, 2008, 02:42:17 PM »
Matt, I was totally perplexed by the rubber nubs, i couldn't find them!  Then, when I took the airbox off, they stared me right in the face.


Guess I need a shop light  :P 

Thanks for the help!