Hi Guys,

I'm happy to found this forum! First of all I want to introduce myself. My name is Martin, I'm 36 years old and since two weeks I'm the proud owner of a 2005 XTX.
I live in Germany - so sorry for my poor english skills ;-).
I bough my bike from a dealer and was suprised that there was a PC V onboard. Reading a lot across I now understand what the benefit of the PC is. The only thing I'm wondering is, that the Co setting on the dash was 26, which from my point of view is quite high in the combination with the PC.
Now I want to go back to the manufacturer setting of the Co value as my bike still has some minor problems with surging.
Does anybody now, how to get the standard Co setting?

Thanks and best regards.

Martin

Firstly Martin, welcome to XT660.com

The factory settings for CO were/are all different, unless you know what it was originally, then you will have to guess. If it has been raised, then it was probably by 15, so taking it down to 11 would be a starting point. Most riders seem to say 25-30 works best though. There is no harm in trying different settings. I'd start by going down in steps of 5 and see how it feels (you can always go back to 26). Just make a note of what you do/set each time you make a change.

You bought a bike with a PC fitted. Do you know what map is loaded? Is there any map loaded at all? Is it the right map? Does the map match the setup of your bike? That's probably something I would investigate too.

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Pleiades,

Thanks for your answer. To be honest with you I have not checked the map on the PC V yet. I would say that the standard map is loaded, as there is no other modification done on the bike (even the snorkel is in place) :-). So I have lowered Co to 10 in first stage and will check the map on the PC.
BTW. Would it makes sense to have a KEv Mode in combination with a PC. I understand that both are riching the A/F ratio but I have the feeling that the machine runs smoother when the oudside temp. is lower.

Martin

You only need the PCV on your 2005 model you can't run both fuel mod together.

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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

That ^ would indeed tend to suggest it's running rich. You might find that it has a map loaded for an aftermarket exhaust and air filter, which we're removed and sold before you got the bike, which in turn might mean it is running a richer AF ratio? (Quite why they wouldn't sell the PCV as well would be slightly odd though.)

What you're probably best doing (after checking the map that's installed) is getting it on a dyno and having a custom map built. Even with a bog standard stock bike, you'd be surprised what can be corrected/achieved with a custom map. All depends whether you have the spare time/money though...

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So I will check the map and the spark at the weekend and will come back to you guys.

Thanks,

Martin