Author Topic: Air filter hose leak  (Read 566 times)

SupersonicSymba

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Air filter hose leak
« on: June 01, 2021, 07:43:33 PM »
Hi
I had a number of air leaks on the hose between the air filter box & carb on my Symba. I know I'm not alone with this as I remember reading posts here before from others having the same issue.
Over time I've been adding sealant but thought I'd try & do something more permanent. I couldn't buy the hose alone. I could only buy the complete air box for $125 so decided to buy a 35mm filter from eBay for $13 & adapt it to fit. I removed the filter by cutting through the steel part to avoid reducing the length of the hose itself as that would make it too short.
I had to file the housing to increase the hole size a little after removing the old hose.
The biggest issue with fitting the new hose is the difficulty of fitting it to the carb as the rubber is a lot harder than the original one. It has to be fitted separately (the original is glued to the lower half or the air box). As there isn't much space & a lot of pressure & twisting is needed it can't be fitted if it is joined to the lower housing. After mounting the hose I then mounted the lower half of the air box to the upper half & added RTV silicone sealer to the hose to housing join. I drilled a hole into the hose so a connector could be inserted for the breather pipe. RTV sealant holds it in place. When it is time to service the air filter I'll have to separate it at the join to remove the lower air box part & reapply silicone again. I can't see any other way.
Have added a 90 degree joiner to the breather tube so that there is less pressure applied to the connector.
Anyway, so far so good. Hope it lasts a while.


« Last Edit: June 02, 2021, 07:40:44 PM by SupersonicSymba »

SupersonicSymba

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Re: Air filter hose leak
« Reply #1 on: June 02, 2021, 01:51:57 AM »
Here is an eBay link to show the item.
https://www.ebay.com.au/itm/153413590439
« Last Edit: June 02, 2021, 07:41:17 PM by SupersonicSymba »


Syd

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Re: Air filter hose leak
« Reply #3 on: June 03, 2021, 10:00:21 PM »
Well done. Hope it's not too loud.

LisaRae

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Re: Air filter hose leak
« Reply #4 on: June 21, 2021, 05:07:01 PM »
How about getting rid of the air box, and instead use a high-performance, after-market filter (one with a washable element) that attaches directly to the mouth of the carburetor?

That's what I'll be aiming for, when the time comes...

LisaRae

SupersonicSymba

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Re: Air filter hose leak
« Reply #5 on: June 22, 2021, 07:45:09 PM »
I thought about fitting a different air filter but decided to stick with the standard air box as with this one there is no way for water to get onto the filter as it draws in air upwards through the frame of the bike & is well sealed. Also, with its washable piece of foam it's easy to maintain. I know some of the aftermarket ones also have washable filters & waterproof covers but I figured that I may as well stick with what I already have.
I don't think by fitting a high performance filter without engine, carb & exhaust mods will have any performance benefit over using the standard filter. Also, another benefit of keeping with this air box is that on  the bottom half of it on the left hand side there is a connector for the engine hose.
« Last Edit: June 22, 2021, 08:01:21 PM by SupersonicSymba »

SupersonicSymba

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Re: Air filter hose leak
« Reply #6 on: August 10, 2021, 04:40:01 AM »
An update:
Today I thought I'd see how difficult it would be to remove the bottom half of the air filter box as it would normally be done to clean the filter as the silicone has well & truly cured by now. Thought I'd try to see how hard it would be for doing future air filter cleaning.
Before, when fitting the new hose to the carb it was difficult as the new hose was a lot less flexible than the original but now, as its been sitting in place for a while on the carb it is a lot easier to remove & refit. It came off the carb together with the housing so removing & reapplying silicone wasn't necessary. It wasn't as easy as when the original softer hose was fitted but wasn't too much of a struggle.
« Last Edit: August 10, 2021, 04:47:47 AM by SupersonicSymba »

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