Modifications - Performance Discuss aftermarket and DIY performance modifications

airbox problems

Old 05-26-2011, 06:52 PM
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airbox problems

So opened the airbox for the first time and what do i find a plastic tray with a what looks like is a small k&n air filter glued in to where a stock filler mite have gone so i was thinking of removing the airbox completly and just running cone filters on each carb so wat i would like to know is if this would work good or hurt the bike ????
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Old 05-26-2011, 07:08 PM
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Anything can work but it isn't worth the time or effort.
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Old 05-26-2011, 07:24 PM
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Stock air filter. Do it and love it. You will need to make sure that you have the air foil in the lid.
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Old 05-26-2011, 08:12 PM
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Airfoil? Im getting carb farts sence i opened it up and i also have exshaust leak where the headers split out for the pipes i neeed did i say neeeeed a new set of headers or at least just the part that the slip on conect to
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Old 05-26-2011, 08:40 PM
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Fiche Parts

Look at it, item #9
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Old 05-26-2011, 08:44 PM
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Dont have that in there and that flat wall looking thing is cut off that right behind it
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Old 05-26-2011, 09:04 PM
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Yeah, it comes on the new filter. Order that air foil and all is good.
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Old 05-26-2011, 09:10 PM
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I think the air inlet is also cut
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Old 05-26-2011, 09:12 PM
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eek, can you put up some pictures?
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Old 05-26-2011, 09:35 PM
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If you need one, I have a complete box...top, bottom, velocity stacks, air filter (I forgot what it looks like. I will check tomorrow). Figure $35 shipped, as long as you are in the US.
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Old 05-27-2011, 04:29 AM
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You wouldnt happen to have a stock header to would youor know of one i can get at least just the pipes that are after where the front and back meet
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Old 05-27-2011, 05:49 AM
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Originally Posted by Superhawk11610 View Post
You wouldnt happen to have a stock header to would youor know of one i can get at least just the pipes that are after where the front and back meet
There may be something in the classifieds. This guy maybe...

https://www.superhawkforum.com/forum...perhawk-25639/
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Old 05-27-2011, 11:27 AM
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Originally Posted by Superhawk11610 View Post
You wouldnt happen to have a stock header to would youor know of one i can get at least just the pipes that are after where the front and back meet
Sorry, Really just the airbox and electrical stuff is left.
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Old 05-27-2011, 12:16 PM
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Originally Posted by superh1998 View Post
If you need one, I have a complete box...top, bottom, velocity stacks, air filter (I forgot what it looks like. I will check tomorrow). Figure $35 shipped, as long as you are in the US.

That's a great offer. My airbox snorkel was butchered by the P.O. so I paid $20+ shipping just for a lid. Anyone with an airbox AFU should jump on this.
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Old 05-27-2011, 01:55 PM
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No airbox and putting filters on the carbs is a headache
You get wind between the carbs

Same applies to only removing the nozzle form the box.
This causes turbulence in the box and it makes big dip 3-5k.

Taking of the top is possible, but extensive dyno needed.

Best leave box stock, with K&N filter + strip.
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Old 05-27-2011, 07:55 PM
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Superh i will take you up on that airbox offer pm so we can work out the details and thank you for the help
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Old 05-27-2011, 10:12 PM
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pm'd
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Old 05-28-2011, 06:55 AM
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OK,
I took a look at the filter this morning, and I am not sure what type it is.
It is definitely not a K&N (those have separate block offs for the small filters). I don't think it's a BMC filter, but it does have the built in block offs like the BMC.
The only numbers/letters on the filter are "H61 HM-MBB".
I do not have the small foam filters that go in the airbox, since this filter obviously blocked them off.
Maybe someone else can help identify this filter?
Let me know if you still want the airbox/velocity stacks/air filter.
Thanks,
Mike
airbox problems-2011-05-28-08.44.15.jpg

airbox problems-2011-05-28-08.44.30.jpg
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Old 05-28-2011, 12:14 PM
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MBB in the part number..... Factory Honda part.
You better pick up the small foam filters and install them unless you want to buy a new set of carbs sometime soon..... yes they are that important.
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Old 05-28-2011, 02:10 PM
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Agreed Hawk,
They damp the slide movement and not having them leads to premature...needle jet wear. I had to buy a set of carbs due to this (didnt know they deteriorated and disappeared).
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Old 05-28-2011, 03:03 PM
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Thanks guys..I had no idea what it was..this is from a parts bike that I picked up a while ago.
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Old 05-28-2011, 04:03 PM
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Originally Posted by superh1998 View Post
I do not have the small foam filters that go in the airbox, since this filter obviously blocked them off.
No, this does not "block off" the small foam filters... They are still needed...

When people are talking about the K&N having separate "block-offs" or the stock filter having them integrated, they are just confusing themselfes and others... Those chambers are not blocking anything...

The airbox have an inlet in the bottom, at each corresponding part... The air passes in there, through the foam filter that sites between the airbox chambers, and these chambers, making a loop in the chambers, down into the hose connected just half an inch beside the inlet... These small chambers keep the airbox and the carb vents separate, making for separate pressure... No separation means a bad running bike, and no filter on here means the carbs will literally self destruct...

Just hoping to clear up the confusion for some people...
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Old 05-28-2011, 08:41 PM
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Lesson Learned...Thanks Tweet.
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Old 05-29-2011, 03:52 PM
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So those plastic blocks inside the airbox come with the K&N filter? The previous owner of my bike installed one and I'm thinking about going back to OEM. What parts would I have to order? Looking at a parts blow up, I definitely do not have Numbers 9, 17, or 10 anymore.

http://oem.thumpertalk.com/images/Ho...%20CLEANER.gif

Thanks for any insight.
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Old 05-29-2011, 10:57 PM
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Originally Posted by K30 View Post
So those plastic blocks inside the airbox come with the K&N filter? The previous owner of my bike installed one and I'm thinking about going back to OEM. What parts would I have to order? Looking at a parts blow up, I definitely do not have Numbers 9, 17, or 10 anymore.

http://oem.thumpertalk.com/images/Ho...%20CLEANER.gif

Thanks for any insight.
9 & 17 should like the picture be mounted to the lid of the airbox... It's fairly popular to remove them...

#10, you should have 2 of this, on the carb vents... No matter what airfilter you have, you really need them...
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