Author Topic: Help picking out OEM air box for '74 CB550K  (Read 497 times)

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Offline uncle_fester

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Help picking out OEM air box for '74 CB550K
« on: May 09, 2019, 10:56:34 am »
My bike came with pods. I messed around with various jets, but it's still not perfect. I'm looking to install and OEM air box and be done with it.

Looking around on eBay, some of the air boxes that say they work for a '74 look completely different. I don't know which one is correct.

I assume this is a good option. Does this look right for a '74 CB550?

https://www.ebay.com/itm/71-76-Honda-CB-500-550-Air-Box-with-K-N-Filter-CB500-CB550-F-K-1974-1975/333179220228?epid=1273940064&hash=item4d93077104:g:9qMAAOSwx5JcykfI

What else would I need to purchase other than the air box? I am planning on getting new boots and a new filter. Anything else?

Offline uncle_fester

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« Last Edit: May 09, 2019, 11:26:32 am by uncle_fester »

Offline Scott S

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Re: Help picking out OEM air box for '74 CB550K
« Reply #2 on: May 09, 2019, 12:01:29 pm »
 The first one is the plenum section with a K&N filter adapter where the stock filter housing goes. I've had one before and it worked great. That filter can be cleaned and re-oiled.
 The second one is just the housing for the stock filter. It attaches where the K&N is attached on the first one.
 If I were you,  I'd get the first one.
'73 CB500/550
'71 CT70
'14 Triumph Scrambler

 and too many projects...

Offline uncle_fester

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Re: Help picking out OEM air box for '74 CB550K
« Reply #3 on: May 09, 2019, 12:47:55 pm »
The first one is the plenum section with a K&N filter adapter where the stock filter housing goes. I've had one before and it worked great. That filter can be cleaned and re-oiled.
 The second one is just the housing for the stock filter. It attaches where the K&N is attached on the first one.
 If I were you,  I'd get the first one.

Thank you, Scott.

Offline Scott S

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Re: Help picking out OEM air box for '74 CB550K
« Reply #4 on: May 09, 2019, 02:11:19 pm »
 New rubber boots are available to replace the split one. Do a search here. Can't remember the name of the guy who makes them.
'73 CB500/550
'71 CT70
'14 Triumph Scrambler

 and too many projects...

Offline Scott S

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Re: Help picking out OEM air box for '74 CB550K
« Reply #5 on: May 09, 2019, 02:50:58 pm »
Email Paul Gabor for air box boots.

mybluebike2004@yahoo.com
'73 CB500/550
'71 CT70
'14 Triumph Scrambler

 and too many projects...

Offline uncle_fester

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Re: Help picking out OEM air box for '74 CB550K
« Reply #6 on: May 10, 2019, 08:55:16 am »
Email Paul Gabor for air box boots.

mybluebike2004@yahoo.com

I wish I would've found this before. I order some on 4into1 that shipped already. Expensive things. Hopefully, the quality is okay.

Offline Kelly E

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Re: Help picking out OEM air box for '74 CB550K
« Reply #7 on: May 10, 2019, 06:43:14 pm »
This one is markedly different. Are they different parts? Confused....

https://www.ebay.com/itm/1974-1976-Honda-CB550K-Air-filter-cartrige-chamber-air-box-76-housing-intake/283469611282?hash=item42001b0112:g:WG0AAOSwoB5cybjW

 I found and ordered one of those plenums with the K&N fliter also. It seems like a good solution without tuning issues and should make carb installation a bit easier.
Never Give Up - Never Surrender

1974 Honda CB550 K0
1984 Honda VF700S Sabre
1994 Kawasaki Concours ZG1000A9

Offline Scott S

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Re: Help picking out OEM air box for '74 CB550K
« Reply #8 on: May 11, 2019, 02:55:57 am »
 I would be cool if one of you could get with a member who has fab skills or 3D printing ability and let them scan/take some measurements of that filter holder. They're NLA from K&N and only occasionally pop up on eBay.
 It would be great if someone could have that on file and be able to print out new copies on a 3D printer.
'73 CB500/550
'71 CT70
'14 Triumph Scrambler

 and too many projects...

Offline Kelly E

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Re: Help picking out OEM air box for '74 CB550K
« Reply #9 on: May 11, 2019, 08:24:49 am »
I would be cool if one of you could get with a member who has fab skills or 3D printing ability and let them scan/take some measurements of that filter holder. They're NLA from K&N and only occasionally pop up on eBay.
 It would be great if someone could have that on file and be able to print out new copies on a 3D printer.

I don't have any problem letting somebody use mine for a scan. My bike is completely disassembled at the moment so I don't need the plenum immediately but I plan on riding it this summer. It should be here next week.
Never Give Up - Never Surrender

1974 Honda CB550 K0
1984 Honda VF700S Sabre
1994 Kawasaki Concours ZG1000A9

Offline flatlander

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Re: Help picking out OEM air box for '74 CB550K
« Reply #10 on: May 12, 2019, 04:00:22 am »
i have this K&N R-0830 which has never been installed.
if needed i can take some measurements of the holder before it goes in.


Offline Gurp

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Re: Help picking out OEM air box for '74 CB550K
« Reply #11 on: May 12, 2019, 02:56:51 pm »
If we get a 3D printing setup going i would def be interested in one! I have a plenum of a 74cb550 on the shelf.
Mankinds Greatest enemy has and always be itself.


slow Progress 74 cb550.

Poor boy chop 73 CB500 chop

Offline Scott S

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Re: Help picking out OEM air box for '74 CB550K
« Reply #12 on: May 13, 2019, 07:42:36 am »
 I actually have this saved on my phone but I can't remember who did it.
'73 CB500/550
'71 CT70
'14 Triumph Scrambler

 and too many projects...

Offline flatlander

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Re: Help picking out OEM air box for '74 CB550K
« Reply #13 on: May 13, 2019, 01:42:10 pm »
the bottom one looks like the original k&n bracket.
the other pics seem like a valid repro, without the port for the breather tube which i find a bit of a cheap trick, anyway.

Offline Scott S

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Re: Help picking out OEM air box for '74 CB550K
« Reply #14 on: May 14, 2019, 03:16:04 am »
 Yes, the bottom is the K&N version.

 It would be nice to have the breather tube inlet.
'73 CB500/550
'71 CT70
'14 Triumph Scrambler

 and too many projects...

Offline flatlander

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Re: Help picking out OEM air box for '74 CB550K
« Reply #15 on: May 14, 2019, 11:11:56 pm »
it's nice but if you attach the tube directly it will be puking breather gunk onto the valves. i'm not sure i like the idea of that. maybe routing it through a filter, like the original does, would help?

Offline Shtonecb500

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73' CB500 FOUR/550 conversion restored - "Rattle-Can"
74' CB550 FOUR/Boss Maroon MetalliC - project cafe build in progress
78' CB750 - Restomod -sold
74' 750 chopper hardtail
74' CB750 - resto mod - in progress

Offline CBGhia

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Re: Help picking out OEM air box for '74 CB550K
« Reply #17 on: May 15, 2019, 10:37:12 am »
If you know someone with a 3d printer, there is a free file for this.
 https://www.thingiverse.com/thing:2723368
CB550 Cafe, GL1000
if you dont trial spin the camshaft in the head and cover you are a novice,with no natural mechanical appitude,destined for destruction.
"The cleaner the dipstick, the closer to God." -Rev. Horton Heat
“Faster, Faster, until the thrill of speed overcomes the fear of death.”  - Hunter S. Thompson

Offline Gurp

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Re: Help picking out OEM air box for '74 CB550K
« Reply #18 on: May 15, 2019, 11:13:17 am »
Im sure someone with a 3d printer could make a run of there cheaper than 60 a pop and still profit from it.
Mankinds Greatest enemy has and always be itself.


slow Progress 74 cb550.

Poor boy chop 73 CB500 chop

Offline CBGhia

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Re: Help picking out OEM air box for '74 CB550K
« Reply #19 on: May 16, 2019, 06:55:29 am »
I might print up one or 2 with some bronze filament to see how it comes out.  I already have one of the OG K&Ns so I don't really need it.
CB550 Cafe, GL1000
if you dont trial spin the camshaft in the head and cover you are a novice,with no natural mechanical appitude,destined for destruction.
"The cleaner the dipstick, the closer to God." -Rev. Horton Heat
“Faster, Faster, until the thrill of speed overcomes the fear of death.”  - Hunter S. Thompson

Offline Gurp

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Re: Help picking out OEM air box for '74 CB550K
« Reply #20 on: May 17, 2019, 03:38:52 am »
I might print up one or 2 with some bronze filament to see how it comes out.  I already have one of the OG K&Ns so I don't really need it.
When you do let me know!
Mankinds Greatest enemy has and always be itself.


slow Progress 74 cb550.

Poor boy chop 73 CB500 chop

Offline CBGhia

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Re: Help picking out OEM air box for '74 CB550K
« Reply #21 on: May 25, 2019, 05:24:31 am »
Just finished my first one. Looks pretty good and sturdy. I don't have my filter at the house to test fit it.
The filter opening is 2.5" so should be easy to find a fitting filter.
CB550 Cafe, GL1000
if you dont trial spin the camshaft in the head and cover you are a novice,with no natural mechanical appitude,destined for destruction.
"The cleaner the dipstick, the closer to God." -Rev. Horton Heat
“Faster, Faster, until the thrill of speed overcomes the fear of death.”  - Hunter S. Thompson

Offline Kelly E

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Re: Help picking out OEM air box for '74 CB550K
« Reply #22 on: May 25, 2019, 07:57:00 am »
Just finished my first one. Looks pretty good and sturdy. I don't have my filter at the house to test fit it.
The filter opening is 2.5" so should be easy to find a fitting filter.

That looks pretty good. The one I ordered is lost somewhere in shipping hell. Now they say it will be here on the 30th, not bad only a month from order to delivery from NY. ::)
Never Give Up - Never Surrender

1974 Honda CB550 K0
1984 Honda VF700S Sabre
1994 Kawasaki Concours ZG1000A9

Offline wolf550

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Re: Help picking out OEM air box for '74 CB550K
« Reply #23 on: May 25, 2019, 10:27:44 am »
that piece looks awesome
the quotes ive been getting out here in cali to make it are around the same as the shapeways price
74' CB550
71' CB500/550

Offline CBGhia

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Re: Help picking out OEM air box for '74 CB550K
« Reply #24 on: May 26, 2019, 03:45:48 pm »
I might see about modifying it some.  There are some differences.  First, the inlet for the filter is larger than the original. 2 1/4 vs 2 1/2.
Also, the top bolt needs a spacer or I need to make it longer.

Now, the original filter isn't available anymore. Most new filters will be round. The original is oval, and it really needs to be if you want it to fit in the stock location, without moving the battery or electronics.
Basically, it needs to be no wider than the stock air box. Might be hard to find with a 2.5" opening
« Last Edit: May 26, 2019, 03:56:00 pm by CBGhia »
CB550 Cafe, GL1000
if you dont trial spin the camshaft in the head and cover you are a novice,with no natural mechanical appitude,destined for destruction.
"The cleaner the dipstick, the closer to God." -Rev. Horton Heat
“Faster, Faster, until the thrill of speed overcomes the fear of death.”  - Hunter S. Thompson

 

;
Honda