All the supporter Power Commander maps are in this section:

http://www.xt660.com/showthread.php?t=2887

I would advise to try a few to see what your bike likes, you can convert PCIII to a PCV map, no problem to use the PCIII map from a none O2 sensor bike.

Kev's 2007 XTX 16.02.2008
O2 Eliminator fitted
Carbon Cans
Snorkel removed
DNA stage 1 & 2 filters
AIS blocked off
Mid set to + 4
51.8 HP @ 6200 rpm,
47ft-lbs torque @ 5200 rpm
95 RON Fuel

Kev's 2007 XTX 30.04.2008
Carbon Cans
DNA stage 1 & 2 filters
O2 Eliminator
Snorkel out
CO1 set to Zero
98 RON Fuel
AIS blocked

08 XT660X
WERX CANS
2010 Kev O2 eliminator
Stage 1 + 2 DNA filters
CO set to Zero

CCC Big Bore Stubby. Frans New Map
Yamaha XT660X ECU ending with 01
Carbon / Titanium Stubbies Carbon Can Co Cans with baffles in
K&N Filter + DNA Filter Stage 2
Modified Air Box with Air Snorkel removed
AIS disconnected
Fitted to Francesco Camardo 29/08/07

06_DNA2
freez
2004/5 XT. ECU ending with 00
Slip-on DNA 2 airbox mods Freez

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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 /
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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