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Author Topic: cb750 air box  (Read 2772 times)

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Offline xfactor

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cb750 air box
« on: January 13, 2010, 05:59:36 PM »
Just pulled the air box off to get at the carbs, figured I may as well clean the air box as well. Any special suggestions or just plain ol soap and water?

Also anyone know where I can pick up the inner gasket for cheaper then 50 bucks?
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Offline ekpent

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Re: cb750 air box
« Reply #1 on: January 13, 2010, 06:09:47 PM »
What year and model?? Yes soap and water to wash,a few things to restore and somebody will have a suggestion for the gasket in the bottom of the top half I am sure.
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Offline xfactor

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Re: cb750 air box
« Reply #2 on: January 13, 2010, 06:30:33 PM »
Quote from: ekpent on January 13, 2010, 06:09:47 PM
What year and model?? Yes soap and water to wash,a few things to restore and somebody will have a suggestion for the gasket in the bottom of the top half I am sure.

1976 cb750f.

It seems who ever had the bike before me was not to fond on spending the 50 bucks for a new gasket so they tried to improvise one out of a much larger gasket, its in the trash now.
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cdwicks

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Re: cb750 air box
« Reply #3 on: January 13, 2010, 06:54:13 PM »
Hey man!  I have a 78 cb750k and have redone most things on it except for the engine which is in the works!  For my airbox, I used gasoline as well because there was some grime (probably mixture of dirt and oil mist) in mine that soapy water wasn't cutting.  However, the gasoline worked great and is cheap (comparably). ;)  As for the gasket, you could use the silicone gasket in a tube.  Be careful though!  Can be messy, so don't use too much.  The seal is pretty important but not that difficult to achieve.  Just be sure you aren't going to be taking it apart a whole lot so do things right the first time!  Hope this helped.

« Last Edit: January 13, 2010, 06:55:59 PM by cdwicks »
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Offline ekpent

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Re: cb750 air box
« Reply #4 on: January 13, 2010, 07:01:38 PM »
Keep the goop to a minimum. You need the gasket that runs on the bottom of the box correct.It has a flat side. I redid a bunch of screen windows this fall,I wonder if there is a rubber seal wide enough that wil fill the groove and give a good seal to the bottom. HMMM-Somebody out there knows the answer ;)
« Last Edit: January 13, 2010, 07:03:29 PM by ekpent »
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Offline BobbyR

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Re: cb750 air box
« Reply #5 on: January 13, 2010, 07:13:31 PM »
Good strong detergent or simple green and a brush should remove the gunk. Some car polishes like Nufinish can bring the shine back.
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Offline bucky katt

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Re: cb750 air box
« Reply #6 on: January 13, 2010, 07:23:13 PM »
i soaked the airbox on my k4 750 in peanut oil for a couple of days. after washing it in hot water and soap, the greasy film was gone, it's squeaky clean and it looks alot better. not new by any stretch of the imagination but alot better than it did.
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Offline Spanqboy

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Re: cb750 air box
« Reply #7 on: January 13, 2010, 07:26:51 PM »
+1 on using peanut oil.  I coated my 78 F2's and let it sit overnight and it looks great.  The grey discoloration is gone.

Quote from: bucky katt on January 13, 2010, 07:23:13 PM
i soaked the airbox on my k4 750 in peanut oil for a couple of days. after washing it in hot water and soap, the greasy film was gone, it's squeaky clean and it looks alot better. not new by any stretch of the imagination but alot better than it did.
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Offline ekpent

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Re: cb750 air box
« Reply #8 on: January 13, 2010, 08:38:55 PM »
Nut oil etc is all good on the outside but where does he get that gasket for less than a Grant-or a $50.00.
« Last Edit: January 13, 2010, 08:40:38 PM by ekpent »
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Offline xfactor

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Re: cb750 air box
« Reply #9 on: January 13, 2010, 08:40:36 PM »
Quote from: bucky katt on January 13, 2010, 07:23:13 PM
i soaked the airbox on my k4 750 in peanut oil for a couple of days. after washing it in hot water and soap, the greasy film was gone, it's squeaky clean and it looks alot better. not new by any stretch of the imagination but alot better than it did.

Does it have to be peanut oil or can I use veggie oil? Got plenty of that laying around, I have a Ford e350 club wagon that runs on used veggie oil.

Thanks everyone for the suggestions
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Offline 750goes

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Re: cb750 air box
« Reply #10 on: January 13, 2010, 08:42:26 PM »
Soapy steel wool pad and hot water - give it a real good going over,
dry it off, then use ARMOURALL - give it a good wash over with this a few times - will look like new

 :)
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