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Discussion Starter · #1 ·
2007 DX

Ok, first of all I'm not looking for a couple more HP, I'm more concerned with sound and feel. Also I am looking for a way to get what I'm looking for without spending any real money.

So, with that said! I had the idea that if I installed a K&N Air Filter and went Topless but limited the air flow directly into the air box it may create a different type of sound while slightly improve performance yet not require a remap.

So, I removed the air filter top cover (topless) and installed the K&N filter. Then to limit the air flow I took a piece of neoprine (mouse pad) and cut it to fit in between the battery and the air filter (just slides in the space between the battery and the plastic housing) to semi block the air intake from the front of the box where the snorkle use to be. This way the battery stays cool but the air is somewhat restricted to the air box from the front opening.

My theory is that there is all sorts of air passage openings around the airbox shell. So when the motor wants to pull in the air it gets all it needs from the perimiter of the airbox shell.

So again in theory even though you are limiting the air flow into the front of the airbox, the high air flow filter is still sucking in more air than stock, yet not as much to require a map change.

The result has been awsome!

Because you restrict the sound from escaping the airbox through the large front opening created when you go topless, the sound stays in the air box creating a deep roar upon exceleration. Insted of hearing the annoying sucking sound that people complain about the sound reverbs off of the inside of the air box like a megaphone and upon exceleration sounds as mean and deep as hell.

The only way I can describe it is insted of just hearing loud pipes (upon exceleration) this application sounds more like a race motor, similar to what a high performance racing Porche or Farrari motor would sound like. After all isn't this what that bike was built to sound like.

Now with that said I think if I drill out the stock pipes (v-mod style) I can get enough additional pipe sound from the rear of the bike which when combined with the intake sound will just ozz speed and power as oppossed to just thumping loud pipe noise. (I have no desire to imitate an air cooled old school cruiser sound. I want to sound new tech, high performance pure motor power "REVOLUTION NOT EVOLUTION")

I have riddin the bike for 100 miles since my mod and have not felt any loss of power, nor have I seen any smoke from the pipes or felt any dead spots. The bike is running at the same temp and so far its all good.

All this cost was the K&N filter price and 10 minutes of my time. I'm real happy with the results so far. Now I have to drill the pipes next. Feel free to let me know what you think, a lot of you are a lot smarter than me so I'm all ears.
 

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Discussion Starter · #6 ·
slamaral said:
spanman
i would love to here it in person. what part of mass are u from. maybe we could meet up sometime to ride
Seekonk - just off of Rt. 6 on the Swansea side, bring some of the girls that are on your My Space page.
 

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i bet mine has a deeper roar with out that piece.. just go topless, if you really want to git all tecnical, do what im doing, im in the middlle of making a few tubes :kinda like dryer hose: that go from the lil steel mesh sides, and goes into the air box. but thats been put a side to save for the turbo, so i wont need that after all lol
 

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Discussion Starter · #8 ·
nightrod81 said:
i bet mine has a deeper roar with out that piece.. just go topless, if you really want to git all tecnical, do what im doing, im in the middlle of making a few tubes :kinda like dryer hose: that go from the lil steel mesh sides, and goes into the air box. but thats been put a side to save for the turbo, so i wont need that after all lol
Yeah but the key here is I am able to get the sound and it seems like more performance "without a race tuner". Its all about limiting the additional air intake almost like a manual race tuner if you will.

Hey maybe I'm out of my mind, I don't know, but I'm going to run with it for a while and keep a close eye on performance and temps.
 

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spanman said:
Yeah but the key here is I am able to get the sound and it seems like more performance "without a race tuner". Its all about limiting the additional air intake almost like a manual race tuner if you will.

Hey maybe I'm out of my mind, I don't know, but I'm going to run with it for a while and keep a close eye on performance and temps.

keep me posted on temps would ya?
 

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I don't think it's limiting the air flow at all, just deflecting the sound, "baffeling" it a bit. There's still way more open area around the airbox cover. I think it would make it sound a bit better though. I may steal...I mean "borrow" your idea.
 

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Discussion Starter · #12 ·
nightrod81 said:
keep me posted on temps would ya?
I run an oil temp gage and so far nothing out of the ordinary and my cooling fan isn't running any more than usual. I swear I am feeling more top-end power. Low-end is probably the same but due to the new sound I feel faster. So now I find myself gunning it off every light to get another blast....man, I am one sick dude.
 
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