Out for a run today on my XT660R 2006. After about half an hour, she has a couple of little coughs and then cuts out.
The bike has a PCIII , DNA stage 1 and 2 and MTC cans. She has been dyno'd and the A/F is set as good as it going to be.
She starts again and idles for about 20 seconds and then cuts out again.
I have had the tank off and emptied the fuel and will put fresh in tomorrow.
I can hear the fuel pump working ok.
Is there anything else I should be looking for?

Cheers

Mike

Look for the trottle body on the left side of the engine, above your gear lever, on the side of the throttle body there is a screw with a spring, give it half a turn and if the bike still cuts out screw it in a little bit more.

That's about it.

Changed the fuel, no joy runs for 20 to 30 seconds and cuts out. Adjusted the screw as Capt described, still the same.
Any other ideas?

Cheers

Mike

Tried it with the petrol cap off ???

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Pipeworx cans, r1 led back light, under tray removed, small indicators, handguards, cnc short levers,

Tried it with the cap off, still the same.
Had enough for today.
Will look again tomorrow

Ok, this might be a long shot, and I will point Kev to this thread to shed some possible light, but I have a suspicion that if you have carried out all those steps and the bike it's still not idleing then the culprit may well be the TPS (Throttle Position Sensor) which it might either need adjusting or, if your bike its a 2005-2006 it may well be that it might have skipped the TPS recall that Yamaha issued at the time, replacing them all free of charge to all owners.

Now Kev will ask you to remove the TPS and read him the serial number once hew knows that he will tell you if your TPS falls under the recall range or not and he might have to give you further suggestions.

good luck and don't worry one way or another we'll get to the bottom of this.

A quick test of the TPS, can you go into the PCIII software & read off the throttle position while turning the throttle, does it go from Zero to 100% uniformly?

Have you blocked off your AIS pipe?

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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

Also please be reminded that Kev can only give you a few tips unless you join the XT Supporter scheme he can't go into full details

http://www.xt660.com/showthread.php?t=1475

Kev
I will have a look at the throttle response tonight and come back to you. The AIS is blocked.

Capt

Will get myself signed up tonight

Cheers

Mike

The reason why I asked about blocking the AIS is I had a forum member block the wrong pipe before. Are you sure you blocked the AIS pipe & not the idle control valve pipe, they sit side by side?

__________________
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