Author Topic: Air box internals (Read 4320 times)

txterror · « **on:** January 08, 2013, 02:06:50 PM »

Cant seem to find these parts anywhere. What do you guys recommend for replacements for #19 and #21. My air box i bought off flea-bay didnt have em.

Scott S · « **Reply #1 on:** January 08, 2013, 02:29:14 PM »

If that's anything like the 550, #19 is just a piece of foam and #21 is a mesh or wire grid. You could probably fab something up. Check out lawn mower filter elements.

txterror · « **Reply #2 on:** January 08, 2013, 02:46:00 PM »

Thanks for the suggestion, any others?

oldbob · « **Reply #3 on:** January 08, 2013, 02:59:42 PM »

I plan to cut a piece of ScotchBrite to fit in my 400's airbox. The screen is still there.

Bob

grouchy · « **Reply #4 on:** January 08, 2013, 08:35:09 PM »

don't use scotchbrite.

the abrasive used in scotchbrite is not firmly attatched, and the use of scotchbrite is not allowed when overhauling an engine as the residual abrasive is destructive. I wouldn't take the chance that some would get sucked into the intake.

70CB750 · « **Reply #5 on:** January 09, 2013, 03:09:41 AM »

Quote from: Scott S on January 08, 2013, 02:29:14 PM

If that's anything like the 550, #19 is just a piece of foam and #21 is a mesh or wire grid. You could probably fab something up. Check out lawn mower filter elements.

+1 maintenance section at Home Depot should provide something to work with.

txterror · « **Reply #6 on:** January 09, 2013, 06:24:47 AM »

Ill check it out, thanks

Blasbo · « **Reply #7 on:** January 09, 2013, 07:47:30 AM »

K&N makes one. http://store.knfilters.com/search/product.aspx?Prod=HA-0100
I don't have one yet, but it's on the list. I believe several forum members have used it with good results.

oldbob · « **Reply #8 on:** January 09, 2013, 08:01:29 AM »

Quote from: grouchy on January 08, 2013, 08:35:09 PM

don't use scotchbrite.

the abrasive used in scotchbrite is not firmly attatched, and the use of scotchbrite is not allowed when overhauling an engine as the residual abrasive is destructive. I wouldn't take the chance that some would get sucked into the intake.

I hadn't considered that. Thanks for the heads-up.

Bob

txterror · « **Reply #9 on:** January 09, 2013, 08:10:06 AM »

Blasbo, I dont think that will fit inside the bottom of the air box

txterror · « **Reply #10 on:** January 10, 2013, 08:17:56 AM »

Ok guys i need your help. Anyone who has part #21 can you please take pics of it and also pics of placement in airbox. I would also appreciate some dimensions if possible. I got a piece of sheet mental and im gona try to fab it. Please. Also if anyone has a piece of that foam thing. I would like a pic of that

oldbob · « **Reply #11 on:** January 10, 2013, 10:04:16 AM »

txterror · « **Reply #12 on:** January 10, 2013, 10:53:33 AM »

Your name should be CoolBob, because you are the COOLEST! thanks soooo much this will really help. Once completed i will share finished piece.

txterror · « **Reply #13 on:** January 10, 2013, 11:12:17 AM »

Does the plate dip into or raise over the tray in the air box. or, Basically in the pics is how it goes into the box, Correct? Hard to tell in last pic. Thanks again, exactly what i needed.

oldbob · « **Reply #14 on:** January 10, 2013, 11:27:52 AM »

The parts diagram in your first post shows the positioning pretty well. In my second photo (side view) the edge closest to my palm should hook over the forward edge of the "tub" that contains the filter.

CoolBob, huh? If only attractive young women had that thought.

txterror · « **Reply #15 on:** January 10, 2013, 11:49:08 AM »

oh duh, i should have looked at parts diagram. Thanks CoolBob

oldbob · « **Reply #16 on:** January 10, 2013, 12:04:00 PM »

I neglected to indicate that the screen is about 10mm high.

txterror · « **Reply #17 on:** January 10, 2013, 12:31:58 PM »

What are you gona do about the filter #19 (foam thingy). Does anyone have a photo of a stock one?

oldbob · « **Reply #18 on:** January 10, 2013, 01:15:56 PM »

I'm not sure how I'll solve that problem. The foam filter in my 400's airbox had dissolved long ago.

I *think* that the filter was there so that oil would have something on which to condense. It would not seem likely that crankcase vapors need to be filtered. If that analysis is correct, then two or three layers of metal window screen might do the job. (SohRon, please step in if I'm wrong.)

txterror · « **Reply #19 on:** January 10, 2013, 02:14:48 PM »

Another issue im having is trying to find a gasket for the lil breather box

Scott S · « **Reply #20 on:** January 10, 2013, 02:15:13 PM »

It's just foam. No more than a few bucks for a piece of lawnmower filter at Lowes or Sears and you'll have enough for extra, probably. It just acts a separator for the oil vapors.

txterror · « **Reply #21 on:** January 10, 2013, 02:25:05 PM »

The breather gasket is the last piece of the puzzle. If anyone know where i might find one please let me know. David Silver Spares sells em but is outa stock until Feb. And i wana ride so................

oldbob · « **Reply #22 on:** January 10, 2013, 04:18:25 PM »

I just pulled the gasket out of mine. It needs to be replaced. So, I found an old bicycle inner-tube, and traced the old gasket. Using a leather punch, I had a replacement in about two minutes. Because a motorcycle tube would be thicker and have less curvature, it would be a better material.

txterror · « **Reply #23 on:** January 10, 2013, 06:19:05 PM »

Mine looks identical to your used one, Ill give it a go. Thanks for the tip Coolbob, jus palyin ill stop calling you tat, OLDbob. You have been very helpful and i truly do appreciate it.

txterror · « **Reply #24 on:** January 11, 2013, 09:36:56 PM »

Well heres what i made outa sheet metal tonight. My first attempt at any type of metal work/fab work. Turned out ok.

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Author Topic: Air box internals (Read 4320 times)

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