Hi,

I recently had an instance where my bike died on me while under power. I was gearing down to go around a corner and suddenly lost all power and the bike coasted to a halt. I switched it off and it fired right back up again. I thought it was weird but figured I might have knocked the sidestand with my heel and the switch triggered but now I'm thinking it could be something more sinister. The reason I say this is because a number of the local SA guys have had the same thing happen to them.

Have any of you guys experienced a similar problem?

Was reported similarly in German XT board. We encountered sudden engine off when rolling along slowly and gearing up from 1 to 2. It happened while passing over the neutral position, I guess. I experienced it once or twice within 5000km. Everybody was absolutely sure there was no user fault and no engine stall. We suspect some mistaken sensor (clutch/neutral?) switching off power. Engines were warm, no cold start issues, no potholes, no offroad, no vibration and nothing else one could think off. Appears to happen at gears 1 and 2 only. So, this sounds quite normal to me

I have 2005 XTX, now at 50,000km. This mysterious stall happens to me about every couple of months. The engine cut out is always when changing gear while moving. Very weird, and I can't replicate it on demand. No apparent problems with the bike and its happened since day one.

Mine does it every now & then, mainly when hot. Just make sure your idle speed is set between 1400/1500 RPM, this will help.

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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

I have recently completed Ruta 40 in Argentina (Northwards), crossed Bolivia and came South through Chile clocking 12,000 Kms in six weeks. My beloved XTZ developed a sudden dislike for power between 4800 and 5100 RPM losing all power until 4800 rpm was achieved by the unrequired "govenor" A few sphincter clenching drops in power while accelerating/overtaking made me visit the main dealer in Santiago. No fault could be found. I have recently experienced the loss of all electrics too from rainwater ingress. Not too worried about the latter but the former seems mysterious. I would appreciate any suggestions as Yamaha are not well represented on the Falkland Islands where I live.

Now I saw this twice, just after fitting the PowerCommander, always coming to a stop and pulling the clutch. I checked my throttle sensor and injector connections and it's not happened since. I put it down to an iffy connection (and it was well below 0c when I done the work).

It's not happened again, so I'm happy with the iffy connection prognosis.

I have in the past suffered this on older bikes and it's always been down to the sidestand switch, quick chop and it's sorted!

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Never underestimate the power of stupid people in large groups.

I agree with GULG - get rid of the side stand switch..