gday Kev and all I need a little help my 99 xtz 660 tenere cuts out after 10 mins and will not start till its cool again ive replaced the battery and fuel It just starts and runs fine and then coughs and splatters and stops it got me stumped all help would be apreaiced.I would all so like to know who in Brisbane works on older Yamaha xtzs .peace

Don't know of anyone who will work on your bike, have you tried replacing the spark plugs, cleaning out the carbs, is the air filter blocked.

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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

Old ignition coils can be prone to breakdown or open circuit when they get hot. Had this problem a few times, once on my old 3YF, but particularly on British bikes and I've found Rover V8s are prone to it too.

Check the spark cold, and after it has cut out, on a hot engine and compare. Better still check the resistance on a cold and hot coil, or find another to substitute. In fact check all the HT side of the ignition while you're at it.

Also, another thing is I just remembered, I had an NX650 that showed similar issues, and that turned out to be the crankshaft pulse generator failing as the engine got hot. Heat can do funny things to electrics, especially cause increased resistance.

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