Breather Tube Foam? - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 14 Old 10-13-2016, 09:17 PM Thread Starter
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Breather Tube Foam?

Anyone have any idea where to find a suitable replacement for the foam in the air box? I'm performing a TPS adjustment and TB sync, and when I took this foam out, it was disintegrating in my hands... Can't be good to have that stuff fall into the crank case or into the air box.

I've tried ACE Hardware and Home Depot, but they don't have anything close.

Don't worry... I'm replacing the air filter, too. Got that on Amazon lol.
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post #2 of 14 Old 10-14-2016, 06:39 AM
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That should do and will last a while
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post #3 of 14 Old 10-14-2016, 11:12 AM
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I don't think I'd use metal brillo pads. A piece of that breaks off and gets into the cylinder could cause cylinder-wall scoring or wedge an oil ring.

I replaced the breather-oil foam when I had my bike down last Winter. The part is still available from Suzuki and I don't think it was wildly expensive around $10. Its a rectangular piece of foam wedged into a non-rectangular breather compartment. See my Airbox Mods post for details. Be sure to trim it to fit and seal the corners and you might reduce oil burning at freeway speeds. I have a theory that just cramming that sponge into the oddly-shaped compartment could leave gaps in the corners that cause oil burning. Since the fit would be random (some better than others) it would explain why some bikes burn more and some burn less oil at speed. When I had my airbox off I could see evidence of oil streaks running UP the compartment in the corner and into the intakes. Sadly, a few weeks ago I threw away my old sponge (which was still serviceable) thinking no one would ever want it!

Alternatively, Home Depot has gutter foam that looks the same and might work if you can buy one piece instead of a whole pack. They are triangular shape so you'd have to cut two pieces to fit. I'd soak it in oil to be sure its compatible but it might be easier to just get one from Suzuki.
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post #4 of 14 Old 10-14-2016, 12:12 PM
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Some lawnmower air filter foam might work and last longer. They are meant to be lightly oiled.

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post #5 of 14 Old 10-16-2016, 05:35 PM Thread Starter
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Quote:
Originally Posted by dmfdmf View Post
I don't think I'd use metal brillo pads. A piece of that breaks off and gets into the cylinder could cause cylinder-wall scoring or wedge an oil ring.

I replaced the breather-oil foam when I had my bike down last Winter. The part is still available from Suzuki and I don't think it was wildly expensive around $10. Its a rectangular piece of foam wedged into a non-rectangular breather compartment. See my Airbox Mods post for details. Be sure to trim it to fit and seal the corners and you might reduce oil burning at freeway speeds. I have a theory that just cramming that sponge into the oddly-shaped compartment could leave gaps in the corners that cause oil burning. Since the fit would be random (some better than others) it would explain why some bikes burn more and some burn less oil at speed. When I had my airbox off I could see evidence of oil streaks running UP the compartment in the corner and into the intakes. Sadly, a few weeks ago I threw away my old sponge (which was still serviceable) thinking no one would ever want it!

Alternatively, Home Depot has gutter foam that looks the same and might work if you can buy one piece instead of a whole pack. They are triangular shape so you'd have to cut two pieces to fit. I'd soak it in oil to be sure its compatible but it might be easier to just get one from Suzuki.

Great post on your air box mods. Actually my foam was cut to fit perfectly inside the housing. I've looked at getting an OEM replacement. They run about $8 then $10 for shipping. $18 for a block of foam? Get outta town...

The gutter filter material sounds like a good idea. I might give that a go.

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post #6 of 14 Old 10-16-2016, 05:57 PM
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Whadabout those plastic shower scrubs? i got one in Black at Wally Mart once. The original is pretty coarse so the scrub may work.
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post #7 of 14 Old 10-16-2016, 06:39 PM
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I was suprised to find my V2 had no foam in it whatsoever?

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post #8 of 14 Old 10-16-2016, 08:52 PM
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Quote:
Originally Posted by Kelevra View Post
Great post on your air box mods.
Thanks. I am actually gearing up for some Winter mods. I'm going to add a check valve to the bottom of the catch-can and dump the captured oil onto the chain using a Scott Oiler tube and injector. An automatic chain oiler!

Quote:
Actually my foam was cut to fit perfectly inside the housing.
I'm guessing the previous owner must have done this? Suzuki just wedges a round peg in that square hole, so to speak. If the PO did this it would explain why your foam disintegrated over time. Who knows what material they used and probably picked something not compatible with oil. My foam was fine after 80K miles (I just wanted a better fit) so it surprised me when you said it was deteriorating.

Quote:
I've looked at getting an OEM replacement. They run about $8 then $10 for shipping. $18 for a block of foam? Get outta town...
Yeah, a bit ridiculous for sure. My order was part of a much bigger order (for my Winter project) so it had no impact on the shipping costs. You could post to the WTB forum and piggy-back on someone's bigger order for you and mail it to you for a couple of bucks.

Quote:
The gutter filter material sounds like a good idea. I might give that a go.
I found that when investigating replacement for my bike. Almost went with it but a stick of it was like $7-$8 (more than enough) so I just went with OEM since shipping was a non-issue. I like Cry-O-Man's suggestion of lawn mower air filter. Back in the day, when I had a mini-bike with a Briggs & Stratten lawn mower engine I remembered those filters. They are about the same size and it would probably work fine and is definitely oil compatible foam as he says. A local small engine repair shop probably has it in stock and its probably costs less than the OEM filter. Good luck, let us know how you resolve it.

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post #9 of 14 Old 10-17-2016, 10:21 AM
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Those lawn mower filters go bad after time too.
I think the mesh is there just to give the oil vapor somewhere to collect. Not so much as a filtering effect.
It's when we dump the bikes on the side that a measurable amount collects in the air box.
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post #10 of 14 Old 10-23-2016, 10:33 AM
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Hanging on the wall at any auto parts shoppe will be a selection of breather filters. One of these will be a chunk of the appropriate foam you can cut into the approximate shape you need.

No idea what car it's supposed to fit.

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