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Air Filters

Fuel System: Gas (Petrol) tanks, Carburators
Vince Lupo
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Posts: 1371
Joined: Wed May 04, 2005 7:17 am

Air Filters

Post by Vince Lupo » Fri Feb 17, 2006 3:09 am

I'm submitting this question under 'Carburation' because it's somewhat connected - you know, the whole air/fuel thing. Has anyone had any experience with retrofitting the OEM air filters with K&N material or the like? I'm trying to avoid utilising the cone-type filters, partially due to the fact that I'd like the filters to remain hidden behind the side covers, and also because the metal frames of the OEM filters offer structural stability to that end of the carbs (being that they're bolted to the frame and all). The carbs that are now on the bike are 26mm Mikuni's and I have the Emgo Dunstall Decibel mufflers, so I figure that a lilttle more free-flowing air would be a good way to round things out in that department. Thanks!

howardj27
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Posts: 3
Joined: Tue Oct 28, 2003 11:49 am

CB77 air filters

Post by howardj27 » Thu Apr 20, 2006 11:01 am

Hello Vince,

Did you ever get any feedback on the air filter question? I have a 64 CB77 that has the original air filter frames but no filter material... Not sure where to go from here... but I am sure I would like my engine to be breathing filtered air, so any input would be appreciated!
Howard Johnston
San Jose CA

Vince Lupo
honda305.com Member
Posts: 1371
Joined: Wed May 04, 2005 7:17 am

CB77 Air Filters...

Post by Vince Lupo » Thu Apr 20, 2006 12:43 pm

Hi Howard -- Actually I didn't get any kind of response to this query. I mentioned it to my mechanic, Bob Wolf of Wolf Cycles in Arbutus, Maryland and actually discussed it with Brian Crichton, who is an editor at Classic Bike in the UK, and they both thought that nothing would be gained necessarily by doing this (by 'this' I mean adding K&N filters or the like). The stock air filters actually have pretty good flow, and the addition of K&N's would then require possible adjustment of the carbs, then do you need a freer flowing pipe, blah blah blah. If you really wanted to go down this road, you could either wrap the metal mesh portion of the filter frame with foam (like a Unifilter), or cut the mesh off and braze a metal hose onto one of the brackets that would allow you to clamp a cone filter onto it -- doing this would give you the K&N filter and would also hide it behind the side covers. You'd still need to use the rubber intake hoses, and just use that one portion of the metal frame that goes into the hoses....does this make sense???? Failing all of that, Nick Fetzer at Ohio Cycle sells stock air filters for $ 50.00 each.
/Misc. Photos/SuperHawk66.jpg

Vince Lupo
honda305.com Member
Posts: 1371
Joined: Wed May 04, 2005 7:17 am

CB77 Air Filters...

Post by Vince Lupo » Thu Apr 20, 2006 12:44 pm

Hi Howard -- Actually I didn't get any kind of response to this query. I mentioned it to my mechanic, Bob Wolf of Wolf Cycles in Arbutus, Maryland and actually discussed it with Brian Crichton, who is an editor at Classic Bike in the UK, and they both thought that nothing would be gained necessarily by doing this (by 'this' I mean adding K&N filters or the like). The stock air filters actually have pretty good flow, and the addition of K&N's would then require possible adjustment of the carbs, then do you need a freer flowing pipe, blah blah blah. If you really wanted to go down this road, you could either wrap the metal mesh portion of the filter frame with foam (like a Unifilter), or cut the mesh off and braze a metal hose onto one of the brackets that would allow you to clamp a cone filter onto it -- doing this would give you the K&N filter and would also hide it behind the side covers. You'd still need to use the rubber intake hoses, and just use that one portion of the metal frame that goes into the hoses....does this make sense???? Failing all of that, Nick Fetzer at Ohio Cycle sells stock air filters for $ 50.00 each.

dppeter
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Posts: 48
Joined: Tue May 30, 2006 4:19 pm
Location: iowa

Re: CB77 air filters

Post by dppeter » Wed May 31, 2006 7:06 am

howardj27 wrote:Hello Vince,

Did you ever get any feedback on the air filter question? I have a 64 CB77 that has the original air filter frames but no filter material... Not sure where to go from here... but I am sure I would like my engine to be breathing filtered air, so any input would be appreciated!
Howard Johnston
San Jose CA
One option is to gut out your old stock filter frames and retrofit them with new filter material. Just go to any auto parts store where you can browse the air filter section. Pick out one of the proper width. Take it home, cut off the ends, and trim it to fit your old metal frames. Silicone sealant will put everything together. It's a little work but - it works!

3030vision
honda305.com Member
Posts: 61
Joined: Fri Sep 10, 2004 2:42 pm
Location: Atlanta, GA

Post by 3030vision » Sat Jun 24, 2006 3:06 am

Hello all,
I finally gave my bike to a mechanic to get up-and-running so I can finally get my bike on the road ASAP. My air filters are shot so I'm asking the same questions about what to do from here. My mechanic asked if he should order some foam and redo the casings. Sounds like opinions may vary a bit, but perhaps filters in the original style are a better option?

I see these on eBay from Apex Cycle ($89/pair):
http://tinyurl.com/g4y6m

That seems a little pricey, but does that sound way out of line? I'm willing to spend the money if it's a significantly better option in the long run.

Thanks!

(Note: Edited to replace that ridiculously long eBay URL that was messing up the page layout.)
Last edited by 3030vision on Mon Jun 26, 2006 10:55 am, edited 1 time in total.

LOUD MOUSE
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Posts: 7817
Joined: Mon Aug 15, 2005 8:23 am
Location: KERRVILLE, TEXAS

Post by LOUD MOUSE » Mon Jun 26, 2006 8:34 am

These nice folks sell the set for $60.00 and I have a set of them and they are really good. ........lm <http://www.olypen.com/retro/>
3030vision wrote:Hello all,
I finally gave my bike to a mechanic to get up-and-running so I can finally get my bike on the road ASAP. My air filters are shot so I'm asking the same questions about what to do from here. My mechanic asked if he should order some foam and redo the casings. Sounds like opinions may vary a bit, but perhaps filters in the original style are a better option?

I see these on eBay from Apex Cycle ($89/pair):
http://cgi.ebay.com/ebaymotors/Honda-CB ... enameZWDVW

That seems a little pricey, but does that sound way out of line? I'm willing to spend the money if it's a significantly better option in the long run.

Thanks!

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