So, my engine mods arrived in the post the other day from a special person in Australia and I set to work immediately installing them along with my DNA Stage 1 & 2 which have been sat on my shelf, ready for this moment...



Here goes!

O2 Mod first, so Left hand side panel off, reveals the underside of the tank, the radiator fan and 2 wiring looms.



The one on the left is the fan power, don't touch that.
The one on the right is the one we want, a thumbnail under the clip and a little tug separates the connector.

Plug in the O2 Mod, and find somewhere suitable to mount it. I simply unscrewed one of the fan mounts and screwed it back in with the O2 Mod in place. Then ziptied the top to the fan mounting.



That was easy! Side panel back on, let's go for a spin.

Straight away, I can feel the O2 Mod doing what it's supposed to do. Low power in gears 2, 3 & 4 doesn't seem to faze it.
Normally when it would slug its way through 2,000 - 3,000 RPM, chug chug chug... you don't get any of that.
Also, I used to ride the clutch all the way round a roundabout... Nope, not any more. Just drop it into third and round you go.

20 miles later...

Right! Kev Fuel Mod time.



The bit we're looking for is under the forward part of the snorkel, on the left hand side. Remove the snorkel, and you'll see the back of the probe in that hole.
Take your air filter cover off, and you'll see the probe staring you right in the face.



Just poke it through into the space between the engine and under seat.
You might find its wiring is wrapped round a mount for the tank, just untangle it (small fingers required) and you'll be able to pull it all the way out to where the air filter is.



Read your KevMod instructions carefully here, only snip the wire you're supposed to. I threw the connector block away and soldered the connections, heatshrinked and then retaped up the sheathing for the loom.


Done, just tidy up the wiring for the FuelMod unit, run it neatly and secure the FuelMod somewhere under the seat.



Now here, you can see I put the original snorkel back in.
Thought I'd do a little test first.

DNA air filter with stock cover (snorkel). KevMod set to about 2PM
Off we go

Well... not a great deal of difference here. I've got a bit more engine noise (from the filter) but not a lot else.
Let's tweak the FuelMod... 4PM

Woops, that made it worse. I lost a bit on the top end and everything feels a bit stifled.

Right, time to dispose of the stock snorkel and put the DNA Stage 2 cover and reducing gasket in.

After a lot of playing around... (Note to self, start at the bottom and work up!) I started at 4/5PM and went all the way up to 9PM ... I finally figured out that 3PM is about right for my bike.
AND WHAT A DIFFERENCE!

I have no need for first gear anymore, could probably put it on the back wheel in second! (I would have dared to if my tyres weren't shagged)

Every gear is just smooth, no chugging (OK well I did get it to chug once or twice but only because I was really trying... should have dropped down two gears at least!) Power delivery is excellent while climbing through 3,000 to 6,000. Can get to top speed quicker, a FANTASTIC roar from the engine now, fuel economy is definitely increased.

Cruising in town at 30mph in 4th gear, 30mph limit suddenly becomes a 60mph limit... just open it up and go. No need to change down.
I'm not on that clutch anymore round every corner and roundabout.
I'm not hopping between gears in town, trying to decide if I should be doing 4,000 RPM in 2nd or stuttering along at 1,800 in 3rd.


This is like a brand new bike. Except better than a brand new bike. This is like a brand new bike with 6,000 miles on the clock, but better.


Kev, you're a bloody genius.

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Bike: 2013 XT660Z, TKC70 tyres

Mods:
Barkbusters, Scottoiler, DIY Tail Mod, DNA Stage 3, Power Commander V & O2 Eliminator, Exan X-Black Stainless exhaust, Tool tube, Ohlins linear front fork springs, Nitron rear shock, JT front and Supersprox rear sprockets, D.I.D. VX 520 chain, Adventure Spec bashplate, DIY USB Outlet, DIY chain guide, Kev's Throttle mod

http://www.facebook.com/onemooseonemotorbike

Nice write up. Another bike transformed! Surprising what a difference the O2 controller makes on its own.

BTW you don't really need to fit the restrictor in the stage 2 cover. That's just recommended when no fuelling device is fitted. Take it out and go to 4/5 o'clock on the dial for more smiles!

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Nice write up. It still surprises me why the O2 Controller + fuel mod has not really taken off. As mentioned even with just the O2 controller your bike will be transformed.

By the way you made me laugh with your PM.

F'kn love you, man.

Got a little parcel all the way from Brissy.

It contained the best �120 I've ever spent.

I would happily let you marry my sister.

Cheers, mate

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Click here to join the XT Supporter's scheme

Mods that I have done to my XTX's

My 04 XTX
Stage 1 & 2 DNA filters / Kev fuel mod / snorkel mod / Drilled air box mod / Engine breather mod / Fork Spacer mod / 15w fork oil /
[
My 07 XTX
Raptor 700 cylinder 102mm / Modified Crank Case to take a 105mm Raptor Cylinder / 11:1 102mm JE Raptor piston / Stage 1 Raptor Hot Cam / Ported head / Colder Spark Plug / +2mm Throttle body / DNA stage 1 & 2 filters / Modified Air Box / Snorkel removed / Worry Brothers stage 2 filter cover / 6mm & 8mm Bolts Replaced with Titanium Bolts / Recovered seat in Black / O2 Eliminator /

My 09 XTX
59HP at the rear wheel / Stage 2 Raptor Hot Cam / DNA stage 3 Air Box / Carbon Can Exhausts / Modified Exhaust Link Pipes / PCIII With Custom Fuel Map / Wideband Commander O2 Data logger / LCD100 Dyno Jet display & fuel adjuster / 2500 OHM HT lead instead of a 10K OHM XT lead / Extra Coolant Cooler / Protaper Fat Bars / Tail Tidy With LED Tail Light / OKE Protection Knobs / LED indicators / AIS blocked / Modified rear sprocket rubbers / Rear Foot Pegs removed / 09 ECU With 02 Sensor Changed To A 06 ECU / Complete wiring harnes Changed from 09 to 04 / Home made LED resistor flasher / Hole drilled in the fuel tank filler neck to allow quicker filling / Modified Bar End Weights / Progressive front fork springs, 15W fork oil, forks lowered 25mm, used XTR rear links lowering the rear 20mm, rear spring one click stiffer / Changed front & rear guards from blue to black / 47T rear sprocket / Speedo Healer V4.0 / Kev throttle cam mod / Throttle grip mod / The new 2010 O2 sensor mod is out, works a treat, The new 2012 O2 Controller is out, PM me for details

Now ride a 2018 MT09SP ABS + TCS

My KTM 990 SMR Mod book. http://www.ktmsmt.com/viewtopic.php?f=13&t=4946

Is yer sister tasty????? Hehe. Great write up well done!!!!

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(Now sold on, sob) 2011 Blue XT660X with gold wheels, was 26,500 km.
Engine mods: K&N Stage 1 filter, DNA Stage 2 filter, snorkel removed, Kev fuel mod fitted.
Plus: smoked Puig screen, Yam aluminium sump guard, Yamaha / Acerbis handguards, Givi Trekker aluminium side cases, Leo Vince X3 cans plus Kev front fork mod and Fender Xtender. Just fitted Michelin Road Pilot 3 tyres.

SOLD the XTX for a Super Ten 1200. And just bought a Raptor 700 so staying on here for some tips....

Great explanation, thnx!