I agree with KLR, if your decision is based on price & you want a faster XT, the Stage 3 Air Box will out perform any after market exhaust on a XT660.

Add the stage 3 air box with after market Can's & definitely a Power Commander, you would make any XT owner smile.

Let us know how she goes Paul?

Have been for a bit of a ride and WOW it pulls alot better the bike is totally different and the induction roar sound great this is a must have mod

Sounds really exciting!
Couple of questions though. Would it be "safe" to install this mod on a bike with a engine that's done over 20k of (hard) miles? I'm a bit worried about spending much and having the engine go bang shortly after.
Also, how long approx would a competent mechanic in a shop need to fit one of these? There's no way I could fit one myself.

Answer 1: not a problem to fit to a 20k bike
Answer 2: Kev is only a phonecall away and he is willing to help any mechanic with fitting assistance and we have a full set up instruction from him already. A proper mechanic will do that in one hour flat.

Go for it mate

It will work no problems on your bike.

As Paul mentioned it changes the way the XT accelerates, my god does mine pull hard now from nothing all the way up the rpm range.

I finally got the stage 3 tested today with positive results. All tests carried out are on the same same dyno at different dates.

Today’s results, standard XT660X, Stage 3 Air Box, Power Commander, Carbon Can Exhausts with baffles in.

One thing to remember all Dyno's read differently that is why I always do a before run to compare the gains, the actual HP is not of any concern to me but the gains from a before & after run is what I am after.

Sheet 1 shows a 7.2HP, 6.13 FT/LBS gain over my standard XT660.
Sheet 2 shows the gains at 7200 RPM between a standard XT660 & the stage 3 air box.
Sheet 3 shows, green line stage 3 air box, blue line stage 1 & 2 DNA filters with snorkel removed, red line standard XT660.

http://i201.photobucket.com/albums/a...evxtx/1-38.jpg

Sheet 2 shows the gains at 7200 RPM between a standard XT660 & the stage 3 air box.

http://i201.photobucket.com/albums/a...evxtx/2-37.jpg

Sheet 3 shows, green line stage 3 air box, blue line stage 1 & 2 DNA filters with snorkel removed, red line standard XT660.


http://i201.photobucket.com/albums/a...evxtx/3-31.jpg

I would like to thank Dino from DNA for allowing me to independently test the stage 3 air box, as the dyno results show it is the best air intake filter mod we have for the XT660X/R.

For the new members to the forum, you might not be aware that Dino is offering these air boxes at a discounted price to forum members, if anyone wants to order one please contact myself or CaptMoto to get your discount.

Kev, what's the reason for the low intial power of the Red trace? Is the std configuration that bad or just how the dyno operator brought the engine on load?

You are correct, it is how the bike was loaded by the operator when he pushed the start button. The Red Dyno run was started at around 3600rpm the others were started from around 2900rpm. I would read the Dyno runs from around 3800rpm. The 3 Dyno runs were taken on different days using the same Dyno.

Great results Kev and Dino.

What size outlets did the exhaust system have? With more air going in, you might find that quite insert will rob some horsepower.

I happy with the results.

My CCC baffles are 32mm outlets, I did run tests 2 years ago & got a gain of 1.3hp at peak with the baffles out with the stage 1 & 2 filters, with a cleaned upped map to see what it made at peak HP, the only problem they are just to loud for me.

WHAT DID YOU SAY KEV.......TOOO WHAT.......MORE THROTTLE:107:

Hello
I have some question to SB
I but used DNA 3 air box but w/o maps to PC3
Who have and can send to my email adres this maps ?
My email adres aluminum@o2.pl

THX

Hmmmmm this is a tempting tempting upgrade.

Can i justify the cost.... Hmmmmmm.

Brilliant info lads... something for my to think about this morning.

Follow up Qn lads/Kev,

Lets assume we take a stock 660x,
a 660x with K&N1, DNA2, Cans, PC3 and map,
lastly, 660x with Stage 3, cans, PC3 and map.

What's the relative difference from stock to the other 2.

Where i'm going with this is, if i get 8bhp more from the Stage 3, but get 5 from the stage 2.... then i may or may not bother....

If the stage 3 is 5-6 more than the stage 2 setup, then i may bite the bullet.

stage 3 gives a wider range of increase....than stage 1+2

Understood... but .. by how much compared to a 1+2 on a bike with cans/pc3.

about 3 hp....

Thanks mate :)

choose your dyno centre carefully...my one was a bit of a kick-up!

I recommend the stage 3...once you can get the price round your head..about �360 delivered.

The HP gain might not be much but look at that Torque gain, Torque is what you feel when opening the throttle.

Stage 3 in RED
Stage 1+2 in BLUE
http://i201.photobucket.com/albums/a...iltersBLUE.jpg

Too late... i bought a stage 2 from here today :)

as you can see...it is a noticeable gain...

this is a nice thread.
just have to get this stage 3 DNA for my bike.

but how is it working with this open box in rain?
specially the crankcase breahter filter should be getting wet if you have the bike standing outside in rain, or?

Hi F... well our expert Kev has prepared a step by step guide on how to fit it and its available in this forum, also another keen member "richardracingmad" has also fitted this and knows how to do it, so if you decide to buy it rest assured you won't be left alone, we will do all we can to assist you. Don't ask me I am not the mechanic type, but if you want it and you want the discount then do ask me by pm, because these filters are exclusive to us :660: and you can only buy from me by pm as they are made to order.

Thanks

Thanks!
i will send you an PM but not right now because i just bought my bike and for now i�m looking for all parts i will change and count everything together.

i do not worry for the fitting as i use to do most mechanic work by myself and are used to that.

just the question with wather is bothering me. i do not wanna have some rain dropping into the crankcase or something like that.
i will use my bike for the fun and for getting to work.
i often work night shifts and the bike will stay outside at work, even if it rains :(

Well do buy it, is my advice..I know they are expensive, but you will forget about the cost once you have it fitted. It will breathe much more life into your engine, and it is a very noticeable improvement, plus they look very cool.

And, if you ever do any more modifications to improve performance, this will be a great starting point.....and it will really compliment other mods.

Water can get in, but it is not bad, and water does not go past the air filter. I don't have a problem with it......

If you like , you can fit a gauze on the side of the airbox, ( Kev has done this) , which will more or less eliminate the water ingress.

that sounds really nice :)

like i said, i�m just looking around right now.
just got my bike and right now i have -20degrees and a lot of snow here in sweden.
had some miles on it but not that many :(
i would like to ride the bike in the original mode a bit more before i do some changes

but the stage3 kit sounds like something wich will be on the bike soon

No worries we are here when you are ready.

Rain water will not enter the filters as long as they are oiled correctly, the filter oil repels the rain water, water will enter the filters if the air box goes under water IE riding through deep water.

I have had my stage 3 air box since 2009 & never had any water problems & I ride my bike most day rain or sun shine.

I added a stainless steal mesh to one side of my air box to hide the pod filters from the police, as in Australia you are not allow to modify a XT660 at all, because it is a learner legal motorcycle.

Tha stage 3 air box offers the most gain out of the filters & exhaust mods, it does cost a bit but it is well worth the money.

Kev, have you had a larger Throttle Body on the DNA Stage 3 Airbox?

The collar between the TB, and the rubber hose connecting the conical air filter will need boring methinks. But I may get a new one knocked up, if there isn't enough material left on the collar.

I have but not on the dyno, you have to get it machined out to match the bored throttle body.

DNA stage 3
 

The stage 3 is a nice item to have.
im selling my bike and everything is going alway so i have a DNA stage3 for sale. if someone here is interested please send me a mail.
thanks

I think your best bet is to post this up in the for sale section at the bottom of the forum