I worked for Suzuki & Yamaha for more than a decade running busy motorcycle workshops, as a responsible repairer you would look at the warranty claim & WORK OUT WHAT FAILED & WHY, these guys saying you have no warranty because you have fitted an after market parts are just trying scare tactics.

I bet you my full months wage that the dealers show room is full of after market parts including aftermarket filters, power commanders, exhausts ETC, as mentioned the problem of not been a warranty job would need to be determined to what actually failed if the aftermarket part caused the failure then I agree not under warranty. Any good dealer will do his best for the customer that is what I do for my 100 od customers a day I have running through my service department.

Over the past 7 years that I have been selling my mods around the world I have not had one single claim rejected by Yamaha with my mods installed on a bike.

A Yamaha dealer here in Australia sell my O2 controller & fuel mods in their show room + KTM dealers also promote my O2 controllers, from yesterdays ebay sale.
http://www.ebay.com.au/itm/130983267373?ssPageName=STRK:MESELX:IT&_trksid=p39 84.m1555.l2649

Q: hey mate I have a 2013 690 smcr, I sorted out the surging by installing an EVO1 breather kit but my bike keeps stalling at low revs. would the o2 controller help with this problem? the boys at KTM team moto Virginia have said they highly recommend your product for the surging but unsure on stalling out at low revs. cheers mate. 07-Sep-13 A:

The O2 controller will correct the closed loop A/F ratio no matter what map or mod is fitted, the O2 controller has sorted a 2013 SD from stalling after fitting a EVO breather kit & free flow pipe. KTM run the closed loop mapping at idle as well so yours would be lean & might be the reason that it is stalling, if it is lean & that is the cause the controller should correct the lean idle A/F ratio. You are welcome to pop over to my house tomorrow to buy one & it if does not fix the stalling or you are not happy with the O2 controller mod I will give you your money back. Cheers Kev

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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