Air Filters....wtf

jthiessen · Mar 27, 2015

So get this:

I drove to work one day, everything was fine and dandy. I park my bike and see that I am missing my left Air Filter. Awesome. It separated between the rubber H-Pipe insert and the metal collar that grips into it. Called my wife, asked her to retrace my route. Thank Valhalla she actually found it. Duct-taped it on, rode home, siliconed it on - Job Done.

Yesterday I went for another ride. Got home, missing my RIGHT Air Filter... Here in lies the wtf. This time the filter fell apart between metal collar and filter material.

What the heck? They are the Pods from MikesXS that the PO had installed. The right filter had Electrical tape around the OD of the pod. What the?

I am frustrated because I need to ride this weekend for work but I won't be able to get any filters in time... And I assume that it isn't keen to ride without a filter.

What would cause the filters to fall apart and come off? :banghead:

jthiessen · Mar 27, 2015

Also, I measured the ID of the H-Pipe (SOHC) and got 44mm is that accurate? I thought I've read it was wider?

Sesty · Mar 27, 2015

jthiessen said:
What would cause the filters to fall apart and come off?

collars not tight enough, Vibrations, wind turbulence, etc...

screw them buggers on tight.. or buy some new uni filters and tape the ones on there until the new ones arrive...whats that saying...

if it moves and it shouldnt : Duct tape
If it doesnt move and it should: WD40

BBS360 · Mar 27, 2015

A bit of filter foam secured over the h-pipe inlet would at least keep debris out until you get a new filter on there.
I don't know if it's come up before. Are you in Victoria? I have a sheet of unused filter foam here.

xschris · Mar 27, 2015

Mikes xs pods are junk. Uni's or real K&N. OD should be 52mm or so. Put them on the pipes so the ribs can grab each other. No tape or glue needed.

xschris · Mar 27, 2015

If you can find them K&N use to make a set for the xs360/400 that fit like the stock ones do. Always use filters that are long and round as they will create less air turbulence than short tapered ones.

jthiessen · Mar 27, 2015

BBS360 said:
Are you in Victoria?

No, unfortunately I am in Kelowna.

xschris said:
OD should be 52mm or so.

Just went out to measure the OD of my Carbs and H-Pipe.
The Carb is 55mm OD
The H-Pipe seems to be 48mm OD
Would that make sense? I was hoping the Carb and H-Pipe would share the same OD so that I could maybe swap out the H-Pipe at some point, but I guess not...

xschris · Mar 27, 2015

Not sure why you get 48mm. I have three sets of these and all where about the same

jthiessen · Mar 27, 2015

ImageUploadedByTapatalk1427514463.667454.jpg

Okay so here is the just. I think my h-pipe has been shortened. I have never noticed that before.

ImageUploadedByTapatalk1427514562.284897.jpg

ImageUploadedByTapatalk1427514583.300216.jpg

So I guess the PO has trimmed it.
The filter that was in the bike:

ImageUploadedByTapatalk1427514905.461007.jpg

Also what is this white stuff where the crank case connects?

ImageUploadedByTapatalk1427514646.614616.jpg

jthiessen · Mar 27, 2015

Also, the trimmed end of the H-Pipe feels much more soft. Which makes me think that it would probably be a better seal to use a filter that fits inside the H-pipe rather than around it...

xschris · Mar 28, 2015

Your h-pipe is stock and don't look to be cut. The pic of the h-pipe with the k&n filters is off a xs360. It's not the same as the xs400 style. If you want the best performance out of an H-pipe and filters that stay on go over the pipe :wink2:

Just as I posted in the previous post. Also ditch those horrible pods you have.

jthiessen · Mar 28, 2015

xschris said:
Your h-pipe is stock and don't look to be cut. The pic of the h-pipe with the k&n filters is off a xs360. It's not the same as the xs400 style. If you want the best performance out of an H-pipe and filters that stay on go over the pipe Just as I posted in the previous post. Also ditch those horrible pods you have.

Okay so it is an unmodified xs400 style h-pipe (it measures 93mm / 3.6" front to back). Still a bit unusual that the OD measures 50mm - no?

I think I will order some Uni's with a 50mm ID. Think that should work.

iamunique127 · Mar 28, 2015

jthiessen said:
Also what is this white stuff where the crank case connects?
View attachment 17884

What have you been doing out there in the garage by yourself?

jthiessen · Mar 28, 2015

iamunique127 said:
What have you been doing out there in the garage by yourself?

Honestly, I dont even know anymore...

xschris · Mar 28, 2015

Looks to be some calcified moister.

jthiessen · Mar 28, 2015

So now I am looking to buy some new air filters. Can I buy 52mm ID Uni's and compress them enough to fit on my 50mm H-Pipe?

iamunique127 · Mar 28, 2015

jthiessen said:
So now I am looking to buy some new air filters. Can I buy 52mm ID Uni's and compress them enough to fit on my 50mm H-Pipe?

Try a bit of silicone spray or WD40 around the inside of the rubber h-pipe. I would think it should slip right on.

xschris · Mar 29, 2015

iamunique127 said:
Try a bit of silicone spray or WD40 around the inside of the rubber h-pipe. I would think it should slip right on.

The ones that I showed are 52mm. DON'T USE ANY WD40 OR SILICONE!!! You want a clean dry surface to mate the two rubber parts together. The ribbing will also hold them in place. I ran the bike like this for a year on NY's crappy tore up roads and never lost one.

kshansen · Mar 29, 2015

xschris said:
The ones that I showed are 52mm. DON'T USE ANY WD40 OR SILICONE!!! You want a clean dry surface to mate the two rubber parts together. The ribbing will also hold them in place. I ran the bike like this for a year on NY's crappy tore up roads and never lost one.

Just a suggestion. If you are trying to mate two rubber parts, or rubber to metal parts, and feel you need to lubricate them DO NOT use any oils or silicone as this will make them slide on easy and slide right off just as easy! Instead after they are nice and clean use a bit of isopropyl alcohol. This will help them slip together and quickly evaporate leaving them to stay in place.

Where can you find this isopropyl alcohol? Any auto parts store has it, look for "Gas line anti-freeze"

iamunique127 · Mar 29, 2015

Thanks for the clarification, guys. Sorry for posting bad info.

Air Filters....wtf

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