About to look at a low mileage 2011 660r with view to buy. Does anyone know if the problematic XT surging issues have been sorted out by this year please?

I believe so, but no direct experience. For what it's worth, my 2006 is far better than the 2004 I used to have, to the point where I don't see any need to modify it. It's a little chunky off idle, but nothing you can't ride around and call it character. I think Yamaha improved the ECU over time, and I'm told that by 07 they had it sorted on the R, so I would reckon a 2011 would be fine. At least, that's how I would be approaching a possible purchase, i.e. not worried in the slightest

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XT660R (2006)
XT600E (1994)
Triumph Trident 750 (1992)
My blog: http://goingfastgettingnowhere.blogspot.com/

I recently bought a low mileage 2009 XTR, and the surging doesn't bother me. Coming from an inline four, I DO notice something odd holding constant speed in 2nd or 3rd around 30mph, but nothing that I would have commented on if it weren't for a million forum threads alerting me to a "problem". As Black Dog says, it's character!

I think it's easy to read about things like surging, buy a bike and then go looking for a problem. In reality, it's a thumper - it is what it is. Get it and enjoy it!

From what I understand, 2009 onwards has an "improved" ECU. My 2008 rode nicely, without significant issue when I test rode it. Then I changed the exhaust system which pronounced the issue to a state that made the bike less than enjoyable to live with.

However, should you find yourself in this position, there is a help available from the resident guru (Kev) on this forum. My bike is now (again) very enjoyable to ride, with the new exhaust.

Good luck!

The 11's still have a small amount of surging, you can always fit one of my 2012 O2 controllers which will stop 99% of the surging

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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

What's that then Kev? So much info to wade through, but couldn't find what you meant. Is it a difficult thing for someone with very basic mechanic skills to fit? Cheers.

Hi there. Kev will probably answer shortly to you (he is in Brisbane, Oz) but I will butt in in the meantime with a little bit of info for you.

Kev has designed these 2 mods to be near enough plug and play with minimal knowledge required, in fact he will also send you very concise fitting instructions, with pictures of step by step procedures. You can ask around in the forum, anyone who has received these has managed to fit the two mods in under 15 minutes without problems.

Thanks Captmoto, all the details are here for the O2 controller.

http://www.ebay.com.au/itm/Yamaha-XT660X-XT660R-XT660Z-XTX-XTR-XTZ-O2-Controller-/130872062544?pt=AU_Motorcycle_Parts_Accessories&ha sh=item1e78953250

My fuel mods can be bought from this link.

http://www.xt660.com/site/node/136

I can combine mods & reduce the postage cost for XT660.com forum members. PM me for full details, payment via PayPal.

You need both mods to correct the A/F ratio for all XT660 models from 2007 onwards.

__________________
Click here to join the XT Supporter's scheme

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