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Old 03-03-09, 12:51
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Kev Kev is offline
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Join Date: May 2006
Location: Brisbane, Australia
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Quote:
Originally Posted by dan07 View Post
Hi Kev,

yes the sensor is in, I'd like to add that the bike needs to be warm before it performs well (no big deal in WA). I did follow your path of converting back to the 05 cable tree and ECU, guess it is the best option at this point to gain control over the fueling but I just wanted to see if the 09 would fix it... which on its own it didn't. I sent a letter to Yamaha Australia to "please explain" why they would release a bike with fueling issues in the first place - lets see if and what they have to say about this subject. I also did follow the European forums (german) but they seem to be at a dead end as well as far as this subject is concerned and are currently discussing your fixes ;-).

cheers, dan
I have been writing letters to Yamaha Australia for 4 years now, telling them what I thought about their XT's surging. I have had one on one armed combat with them, they know me well. They even bought a Kev Fuel mod to test, with no feed back from them.

There is more to the puzzle of these 07 to 09 fueling problems. I have recently found out that AIS is in the O2 Air/Fuel ratio equation. The ECU compensates it's readings when the AIS valve is open, so we will get a different A/F ration when the AIS valve is open to when it is closed, the ECU compensates it's reading when the AIS valve is told to open, this is more then likely why I have been having problems in getting the surge under raps.

We are still working on a solution.
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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


Last edited by Kev; 03-03-09 at 12:58.