Hi all, i have recently purchased a second hand xt660x.It has a few mods.( variable resistor in series with air temp sensor) it has arrow cans and a dna stage 2 air filter. What or where do I set the resistor to adjust the fuel ratio.
I dont to run lean and do damage.
Cheers.

Well er how long is a piece of string hehehehe. Most of us go the other way ie start with a standard bike and start making modifications, you are starting with a modified bike and you are not sure what you have!!! If I were you I would try the following steps:

1. Contact the previous owner and ask him/her for a list of all the mods made.
2. Also ask him if he has all of the standard parts like the air filter cover and the exhausts (for instance) and I would even offer to buy them from him. This way you could put the bike back to standard trim.
3. Start keeping notes of everything you do to the bike away from standard.
4. Check the mixture by removing the plug, the colour tells you if the mixture is ok or too lean or too rich.
5. Adjust the variable resistor to 6pm, dont forget that this resistor will richen the mixture and if removed (or at 12 oclock turned anticlockwise) simply puts the mixture back to standard, which suts the pertol and partial throttle.

Then you can gather loads of other info on your bike my reading this wonderful forum!! And if you like I can try and help you more if you tell us what else has been done to your bike ok????

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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....

Thread moved where it makes sense to have it, this is the new forum members Greeting Area.

What colour knob is on the mod & what position is it set to right now?

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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 /
[
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

You can easily check. Go to service setting on your dash. (push both button simultaneously and switch on igniton). Go to the diag menu and go to d05. This is the air temp sensor. Now adjust the meter on the wire attached to the sensor. You will see the temp change on the dash. The factory setting is the highest temp, as this device is a resistor and is used to fool the ECU, by reading cooler temp.

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