Airbox lid mod + PC5

[Old3]

I added a PC5 and proceeded to remove the lid from the air box cover. Damn, thats loud now.

So, figured i could snuff that intake while still giving it enough air and tried this. Works for me, bike still feels great and the nasty intake roar is gone.

i choped out the rear facing panel, leaving the screw arras intact. Then i glued a piece of closed cell foam on the top inner panel. Screwed it back together, bolted it in and happy with the results.

 

[Old3]

Oh yeah, not much time on it as it snowed again, but Chads tune feels great, beefed up the bottom, smoothed out the huge vibrations at wfo at low RPM.

 

[reenmachine]

That lid mod is probably actually a pretty good compromise! I'm interested to hear what Chad thinks.

 

[cjwell]

I think it's stellar. If it fits your needs/noise requirements then you have done well. I am always "looking" for power. Noise is at the bottom of the concern list, intake noise that is. Exhaust note is a different story. I know a lot of street guys that put more miles on one than I would am concerned and or irritated by it, I get it. 8 lap sprint race, you never notice it. My hearing is probably slightly more desensitized than general riders too from half a lifetime of exposure. I would be very interested to see that lid mod backed to backed with the open one, comparing the fueling. I would guess, but every time I do I'm proven wrong and baffled lol. The tune I sent you in the PCV might need to be touched up just a bit for that lid config. Or it might be spot on. Either way it would be best to check if you have a good dyno near by. If you're happy with it and nothing noticeable seat of pants fueling wise, RIDE ON.

 

[Old3]

Im happy with it but its just up and down the street so far on a 35f day. So, if you ever dyno one like this ill just pirate you new map, if it needs it.

My SE had Uni pods on 39mm FCRs but i usually only raced that when itd be wide open. Street riding i could keep the intake noise down. Did a n300 with pods and hated it. I ended up replacing the air box after awhile. Gret power, but deafening. .

 

[motoputz]

The Foam on the inside is a simple fix and a good idea. I removed the snorkel from my air box lid, opened the hole in the lid to about twice the original size, added a stainless steel mesh to keep birds out along with a reflective surface and put in a K&N filter. I normally ride with ear plugs so the increase in noise was not that noticeable until a took a short ride across town with out the ear plugs. The excess sound does not bother me but I have a track day coming up at Laguna Seca and am worried about being to loud in the sound check zone. I will take some foam with me in-case I get a black flag for noise. I think the limit is 90dB and I know twins and singles have more trouble with it because of their lower resonance tones.

 

[psych0hans]

Thanks for posting this, I've placed an order for a replacement airbox lid, as I don't want to cut up my original.

 

[RC390 Fan]

I like this mod idea because I'm not a big fan of the loud intake noise via lid removal. But are you sure that is "closed cell" foam? Looks open cell to me.

I added a PC5 and proceeded to remove the lid from the air box cover. Damn, thats loud now.

So, figured i could snuff that intake while still giving it enough air and tried this. Works for me, bike still feels great and the nasty intake roar is gone.

i choped out the rear facing panel, leaving the screw arras intact. Then i glued a piece of closed cell foam on the top inner panel. Screwed it back together, bolted it in and happy with the results.

 

[Old3]

What did i write? lol. Yes, open cell, simple packing foam i trimmed to fit.

 

[RC390 Fan]

Is the foam for sound dampening? And if so did you notice a diff with and without it in there?

 

[Old3]

Sound damping and i never tried it without. Not scientific and if it was easier to get it on and off id have done it. What a PITA.