Author Topic: Air Box Boots/ we all hate them, but.....  (Read 6777 times)

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Offline pablo78cb550

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Air Box Boots/ we all hate them, but.....
« on: September 22, 2005, 02:58:34 PM »
to run a new 4 into 1 exhuast on my bike, i have to use the old air box.>:(
the boots from the air box to the carbs
1. old and cracked.
2. make removing the carb/air box a big problem.

I want to use new pod filters.
The instructions for the exhuast say if i use the pods i will have horsepower problems in the low and mid range. Even after tweaking the jets! does anyone have any thoughts? maybe a smaller a carb set with pods?
help! help!
« Last Edit: September 22, 2005, 03:03:21 PM by pablo78cb550 »
Bikes in hand:
1977 Yamaha XS650
1978 Yamaha SR500 #119!
1978 Yamaha XS400
1978 Honda CB550K
1965 Ducati Monza 250

Sold off:
1992 Yamaha FZR600
1978 Yamaha SR500- I miss it so much.
1981 Yamaha Seca 550

corbinsa

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Re: Air Box Boots/ we all hate them, but.....
« Reply #1 on: September 22, 2005, 03:13:17 PM »
i'm not sure on the SOHC 4's, because i've not got mine running yet, but i've got pods on my '03 yamaha v-star 1100, and it runs like a raped ape. my CB550 has pods though, and the guy i bought it from (friend and mechanic) said it ran great when he parked it. it also has 4-1's. the low end issue comes into play any time you have multiple carbs. it gives you more in the high end. you want more in the lower end, you need a manifold and single carb. there's a kit for the v-star and all the data from it supports this.

Steve

Offline pablo78cb550

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Re: Air Box Boots/ we all hate them, but.....
« Reply #2 on: September 23, 2005, 12:34:37 PM »
is there a better option then running a yamaha carb with a manafold i don't have.
Bikes in hand:
1977 Yamaha XS650
1978 Yamaha SR500 #119!
1978 Yamaha XS400
1978 Honda CB550K
1965 Ducati Monza 250

Sold off:
1992 Yamaha FZR600
1978 Yamaha SR500- I miss it so much.
1981 Yamaha Seca 550

Offline TwoTired

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Re: Air Box Boots/ we all hate them, but.....
« Reply #3 on: September 23, 2005, 02:16:58 PM »
We don't all hate the stock airbox.  Some of us prefer them.  For a street bike, they work better than pods.  Every bike I have gotten with pods, had jetting and other performance issues mostly solved with the return of the airbox and a Uni Foam filter element.

Rain ingestion, crosswind effects and where you put your legs near the outer carbs are some drawbacks of pods.

Futher, pod filters effect the slow jet/idle fuel metering system.  On your carbs, the adjustment range available for compensation is very limited.  The slow jets are pressed in and replacements (let alone other sizes) are made of unobtainium.  The carb bodies are machinable to accept screw in types, but skills to perform this have to be acquired or purchased.

It is much easier to learn how to fit the carbs and airbox properly.  If the rubber couplers are already buggered up, get new ones from Divid SIlver Spares, assemble and ride.  But, if you'd rather tinker with poor throttle response, and other carb tuning issues, go for the pods.  The year's education could be worth it in the long run.  But, if you can't solve the puzzle of installing and removing carbs with the stock airbox, the puzzle of correct carb rejetting is way beyond that simple endeavor.

If you think pods are an easy fix...  Just make a pedestal for it and put it in your living room as an art exhibit.  Or, prepare yourself for a long learning experience.  Pods can be made to run well on the track, with knowledge and tinkering, if that's what you want to do.

Dang, I think someone put bitter pills in with vitamins today...

Cheers,
Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

Offline Uncle Ernie

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Re: Air Box Boots/ we all hate them, but.....
« Reply #4 on: September 23, 2005, 03:49:20 PM »
TT, you've inspired me. I've been having troubles w my 400, too. I like the pods because they make the engine sound like a baby tiger growling. I keep rebuilding my carbs- maybe that's not the problem?!?! Just put an inquirey in to DSS...
Dude- your 8 layers are showing!

Offline pablo78cb550

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Re: Air Box Boots/ we all hate them, but.....
« Reply #5 on: September 23, 2005, 05:32:16 PM »
gee.
thanks twotired.
Bikes in hand:
1977 Yamaha XS650
1978 Yamaha SR500 #119!
1978 Yamaha XS400
1978 Honda CB550K
1965 Ducati Monza 250

Sold off:
1992 Yamaha FZR600
1978 Yamaha SR500- I miss it so much.
1981 Yamaha Seca 550

Offline Uncle Ernie

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Re: Air Box Boots/ we all hate them, but.....
« Reply #6 on: September 24, 2005, 05:36:37 AM »
Well, those boots/rubber couplers/whatever are a big problem-

and David Silver no longr has them or the airbox.   Anyone have an alternative?
Dude- your 8 layers are showing!

Offline hymodyne

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Re: Air Box Boots/ we all hate them, but.....
« Reply #7 on: September 24, 2005, 02:08:22 PM »
I started with the notion that pods were what I needed on my 500, but I have carb issues that have made me  revert to the stock box and a UNI foam replacement filter element. This has become a commuter bike in light of soaring gas prices, so I need it to run well in all weather conditions.

pods look cool, and if you're outfitted to go through many trial and error scenarios concerning mixture/jetting, go for it, but I enjoy my time on the bike these days, not scratching my head sitting next to it with the tank off...

hym

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Offline Uncle Ernie

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Re: Air Box Boots/ we all hate them, but.....
« Reply #8 on: September 24, 2005, 08:28:45 PM »
I'll bite- what's a Uni filter?  I have the stock airbox but those connectors are useless. A friend says I can boil them to get them pliable again but...
Dude- your 8 layers are showing!

Offline Bodi

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Re: Air Box Boots/ we all hate them, but.....
« Reply #9 on: September 24, 2005, 09:18:25 PM »
I've had some luck with a product called "MG-408 Rubber Renue".
It comes in a 3.5 oz bottle for about $6.00 and smells nasty. It makes the parts nice and black and restores some flexibility to old rubber.
Usually available at electronics suppliers, the same company (G-C Electronics?) makes all sorts of stuff like corona dope, printed circuit supplies, etc.

Offline 78 k550

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Re: Air Box Boots/ we all hate them, but.....
« Reply #10 on: September 24, 2005, 09:51:14 PM »
Man I just did this today. I didn't put the box in before I put the carbs on my 72 CB500. I didn't want to pull the carbs. so I took out the battery tray and slid it in that way.
Here is the UNI Filter I run in my 78 CB550.

Paul


Paul
Littleton, CO

76/77 CB 750F, 
75 GL1000, (AKA GL1-242 NGWClub),
76 GL1000 LTD
84 GL1200 Standard
6 Bultaco's= 42, 49, 121, 152, 167, 188

Offline seaweb11

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Re: Air Box Boots/ we all hate them, but.....
« Reply #11 on: September 24, 2005, 10:28:00 PM »
I have pods on my 78 750. Love them!
Had to do a little tweaking at 1st with the main jets but 5000 miles later still no issues with rain, my pant legs, wind or small squires...my learning experience lasted all of two-three days and 3 sizes of jet sizes before I found the sweet spot. I clean them every so often, but I used to clean my stock filter too.

I have the rubbers off of my 750 air filter and I will GIVE  them to you if every one here that can't stand to  watch myth busters will get off there horse and....

Come on guys...it really is possible to run these things with no ill effects with pods  as many many many  posts before have endeavored to educate.

Offline 74cb750

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Re: Air Box Boots/ we all hate them, but.....
« Reply #12 on: September 25, 2005, 06:38:19 AM »
seaweb,
really? I am still having problems with low end running (pods on 74 and 75 cb750's).
I also have cleaned the carbs more times than my wife washes her hair in a day  ;D .
Still, not run good, boo hoo. Like no power under 3K rpm

SO....you fou;nd the zone. What did you do? Care to share?
How much is this going to cost me?
Send bill to andynzl, he loves to spend $
michel
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Offline Uncle Ernie

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Re: Air Box Boots/ we all hate them, but.....
« Reply #14 on: September 25, 2005, 05:52:06 PM »
I didn't think any of these bikes got out of bed for anything under 3K.

So- why is the Uni filter better than the stock element?
Dude- your 8 layers are showing!

Offline 78 k550

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Re: Air Box Boots/ we all hate them, but.....
« Reply #15 on: September 25, 2005, 06:52:52 PM »
See how it is slid out. You can clean them and use them over and over for long time use. 25.00 at any parts place for motorcycles. They have a web site http://www.unifilter.com/

Paul
Paul
Littleton, CO

76/77 CB 750F, 
75 GL1000, (AKA GL1-242 NGWClub),
76 GL1000 LTD
84 GL1200 Standard
6 Bultaco's= 42, 49, 121, 152, 167, 188

Offline Gordon

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Re: Air Box Boots/ we all hate them, but.....
« Reply #16 on: September 25, 2005, 11:15:48 PM »
I didn't think any of these bikes got out of bed for anything under 3K.

So- why is the Uni filter better than the stock element?

I bought a UNI filter for my 550 project, but mainly because I'm in Denver and hoping to compensate for the thinner air by getting it a little more air flow without going to pods. 

Offline TwoTired

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Re: Air Box Boots/ we all hate them, but.....
« Reply #17 on: September 26, 2005, 12:16:16 AM »
So- why is the Uni filter better than the stock element?

I don't think they are better from the standpoint of trapping fine particles.  They probably don't filter as well as the stock Honda one.  And, if I operated the bike in dusty areas I would opt for the stock paper type.

However, the stock ones are about $40 a pop, and are supposed to be replaced every 12 mos or 6K miles.
In ten years that's $400 in filters.  The Uni can be cleaned, reoiled, and reused for an initial outlay of $40-$50 for the filter, cleaning spray, and oil spray cans.  This has lasted me far longer than 10 years.  And, it makes good sense for the way I operate my bikes.  Lastly, I have not found any need to change the jetting or adjustments from stock on the carbs for the CB550.  If anything, they gave me better mileage, too, I think.

For a brief time I had a CB400.  While I was restoring the machine, I had plans to graft the Uni screen and foam into a gutted stock filter frame.   I was going to epoxy or JB weld the cut down screen from the Uni in place to ensure the engine wouldn't suck in the foam.  However, I sold the bike while completing the retoration.   And, the new owner opted to go ahead and use a new stock type instead of waiting the extra day or two for a cleanable element conversion.  Pretty sure it would have worked just fine.  But, I can't say for sure.

Cheers,
Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.