Replace 449/511 airbox with K&N RU-0990

http://www.supermotojunkie.com/showthread.php?137504-How-To-Install-K-amp-N-RU-0990-449-511

And looks like the dud is building a dual exhaust as well!

http://www.supermotojunkie.com/showthread.php?137493-That-restrictive-airbox

A while back I started looking into doing this exact thing. Nice post !

That would be me. I am fabricating the dual pipes this weekend. Should have it welded during the week (is the plan).

Thankyou for your r&d work ! I would be happy to pay you $40 on top of what the parts are + shipping to fix me up with your k&n setup ... Pm me if interested .

Also read on smj you only had 40 miles on your bike . You have not dropped any oil on your valve cover yet from your breather ? I see a-lot of extra room for a breather box to mount in the airbox area with this intake mod... Also should gain a couple horsepower . Mine does 47 rwhp with no airfilter, 44 with.

Rearwheelin,

If you want to send me something, then I will not complain ;-), but it is not necessary. You could however buy my dual exhaust after I am done lol. I posted the parts in the link, but here they are again. I do not stock these, so it only wastes money for me to order then ship to you. However, if you need for me to drill the hole for the Air Intake Temp sensor and shave down your sensor, I could do that for the the $40 and send it to you. If that is the case, check your PM for my contact info.

http://www.siliconeintakes.com/prod...d=360&osCsid=28ed6e60e35375693764ddd140e07968
http://www.siliconeintakes.com/prod...d=111&osCsid=28ed6e60e35375693764ddd140e07968
http://www.amazon.com/RU-0990-Unive...id=1360381918&sr=1-1-catcorr&keywords=ru-0990

Thanks man, I will just order the stuff. You saved me and others $100 bucks doing this mod right the first time

I only wasted $30 figuring this out.

That looks .... heroic! Wish someone clever could do the same for the 630.

Looks awesome mate! Id love to open my airbox up like that! My 11te511 was tuned to a healthy 53.6rwhp! With Full akro, PCV and Unopened airbox.

Do you reckon the K&N would fit in the airbox? For when i chuck dirt trim back on?

Keep up the good work matey.

Actually I bet it would. You may have to open the inlet hole on the airbox is all. This bike should never see dirt, so I am not concerned about that. I also have a stock 510 tank arriving soon. I am going to attempt to cut the tank in half and "stretch over the 511 frame, fiberglass it and make a mold, so I can build a 510 tank onto my 511 and have almost 6 gallons of fuel. About another 15 pounds of weight, but I am mainly street riding on this thing, so not a big deal. I have the OEM airbox, I will put a mic on the OD of the silicon and the ID of the inlet and let you know.

Sweet mate.

Yeh Trails for winter, Tard for summer
Just worried about the crank case breather, as i thought that worked for the crankcase vaccum?

Yes, as far as I know, You most definitely do not want mud on that one.

That K&N is too small. I posted a link in another thread using a vortex, but it will require hot air shielding.

Disagree, show me your math and I will show you mine?

According to the K&N spec sheet, the RU-0990 flows 318 CFM @ 1.5” of H₂O

I calculate that our engine consume 73CFM @ 8,400 RPM @ 100% VE.

And what does "I posted a link in another thread" do to help this discussion :-P. At least URL it up man lol. I should be writing code and not perusing the forums as it is -- definitely no time for searching threads during the day.

Sorry, I'm mobile and do not have time to help you with your project. I have enough of my own projects like keeping our engines from blowing up. Good luck.

Just out of curiosity, how did you calculate it?

Correct, divide by two. I did 489CC though, so my number was a bit higher (wishful thinking). I personally spoke with a tech at K&N about the flows of their filters. Their filters support air flow, period. I had an air filter roughly 4 times larger than this supporting 600rwhp on my 1994 Toyot Supra running 22 pounds of boost on a T64 turbo...and the limiting factor on that was injector size. I could not supply enough fuel to go over 22 pounds.

I am still really hoping to get 60+ rwhp out of this motor, but may be disappointed. I did look at the Aprilia SXV5.5 for the beast it is. But things worked out that I have the 511 (and decently happy with it after putting only 35 miles on it -- before I took it apart -- and drove my wife crazy because there are two new bikes under the knife in the garage).