Just fitted a MM 2 in 1 exhaust to my girlfriend's 07 xtr. Looks great and certainly is a practical improvement over the stock ones.

I have got one issue I'm struggling with at the moment. I bought the exhaust on ebay from someone selling their XT but their bike must have been a couple of years older as the older MM pipes don't have a place for the Lambda sensor which the stock ones on '07 bikes do.

My question, and one that my local Yamaha dealer and Paul from MM were unable to answer is what do i do with the Lambda sensor? Will the bike run with it like this or do i need to do something?

Your expertise and thoughts would be much appreciated...

Buy Kev's Fuel Mod for the 07> models. This includes the O2 sensor eliminator, and your bike will run better as well.

You have 2 choices.

You can weld a O2 sensor bung into the header & fit back the O2 sensor.

http://cgi.ebay.com/ebaymotors/OBX-BOSS-PLUG-NUT-OXYGEN-O2-SENSOR-BUNG-SS304-STAINLESS_W0QQcmdZViewItemQQ_trksidZp3286Q2ec0Q2em 14QQhashZitem5ad33ea1cdQQitemZ390091153869QQptZMot orsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

Unfortunetly my O2 eliminators are out of stock & won't be making any more O2 Eliminators at the moment & recommend you use this one, remove the O2 sensor & plug this in. We are using this O2 eliminator on all the XT's with a O2 sensor including the XTZ. Then fit a fuel mod to increase the fuel mixture to get a better A/F ratio with all your mods.

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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

Thanks for the quick reply guys, just thought i should follow up as I'm still not the most knowledgeable mechanic (am working on it though!!), and am discovering more as i work on and prep the bike, so forgive me if these questions are (really) stupid!

Which of those 2 options do you recommend? And could you explain exactly what i need to do with it? And a word on the required fuel mod would be very much appreciated!

I'm really sorry, but am new at this and am learning as I go!

thanks again!!

Bobduro,

I have a genuine 02 eliminator that i bought from Dyno-jet UK. Used one on my XT X 2007 model, seemed to work OK.

You can have it at the bargain of �15 incl postage.

Drop me a PM if you are interested matey

Cheers

WB

if bobduro doesnt have the eliminator, i will mate.
thanks.

Thanks Worry Brother,

have PM'd you