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  #21  
Old 01-06-13, 15:16
marques marques is offline
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Above o2 link is dead

Want to purchase the o2 mod. Could someone give a link to somewhere i can purchase it. Does it come with instructions.
  #22  
Old 01-06-13, 15:35
Pleiades Pleiades is offline
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Quote:
Originally Posted by marques View Post
Want to purchase the o2 mod. Could someone give a link to somewhere i can purchase it.
Send Kev a PM or buy on eBay...

http://www.ebay.com.au/itm/Yamaha-XT...item1e77c5c493

Quote:
Originally Posted by marques View Post
Does it come with instructions.
Yes
  #23  
Old 01-06-13, 22:06
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Kev Kev is offline
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I have a 6 X O2 controllers left as I have sold more than expected, with the OEM connectors on back order again so not sure when the next batch will be ready last time it was 2 months before I got the back order connectors.

Kev's mods

http://www.xt660.com/showthread.php?t=20592
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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

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  #24  
Old 05-06-13, 12:59
tacomodo tacomodo is offline
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So, let me see if I got this:

O2 eliminator required to fix closed loop so the jump in AF ratio between closed and open loop is not so big.
On that note closed/open loop refers to idle throttle/open throttle.. ?

Moving on - Kev's mod fixes the open loop AF ratio so that you can turn the knob to experiment and find where you feel the bike running better (as in stronger or smoother?)

And may I ask - where have you all fitted it? I've got the ABS version there is *no space* under the seat to speak of. Will I need to dismount half the bike to fit it?

Last edited by tacomodo; 05-06-13 at 13:20.
  #25  
Old 05-06-13, 13:25
Pleiades Pleiades is offline
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Quote:
Originally Posted by tacomodo View Post
So, let me see if I got this:

O2 eliminator required to fix closed loop so the jump in AF ratio between closed and open loop is not so big.
Yes. It fixes the AF ratio to 13.6:1 instead of 14.7:1

Quote:
Originally Posted by tacomodo View Post
On that note closed/open loop refers to idle throttle/open throttle.. ?
Sort of, but it's a bit more complex than that.

Closed loop is where the O2 sensor is feeding information back to the ECU about air/fuel ratio and fixing it to 14.7:1 - this happens at idle, small throttle openings and constant throttle when cruising below 3500(ish)rpm. It will be fixed at 14.7:1 regardless of what any fuelling device is set at.

In the open loop the information from the O2 sensor is not used to correct the air/fuel ratio (a fuelling devise will be able to control the air/fuel ratio in this state and get it down to 13.6:1) - the open loop operates at large throttle openings, high revs and while accellerating.

Quote:
Originally Posted by tacomodo View Post
Moving on - Kev's mod fixes the open loop AF ratio so that you can turn the knob to experiment and find where you feel the bike running better (as in stronger or smoother?)
Yes.

Quote:
Originally Posted by tacomodo View Post
And may I ask - where have you all fitted it? I've got the ABS version there is *no space* under the seat to speak of.
I fitted the O2 controller on the flat underside of the tank behind the left hand grey panel with a sticky pad. The Kev mod is quite small and I dare say could be sqeezed under the seat, but you can lengthen the two wires very easily and mount it practically anywhere. Some folk have mounted it by the dash so it can be adjusted on the move. You'll be able to get it in somewhere for sure.
  #26  
Old 05-06-13, 13:27
Gas_Up_Lets_Go Gas_Up_Lets_Go is offline
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Quote:
Originally Posted by tacomodo View Post
And may I ask - where have you all fitted it?
The break in point is just above the engine on the left side of the bike (as you sit on it) I have the O2 tuner cable tied to the long bolt that holds the tank on. The red light puts sort of a red glow all over the engine in the dark, looks weird!

It doesn't go under your seat, not sure the cables would reach. Takes about 5 minutes to fit from start to finish, and you can remove it just as quick if you want/need to.
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  #27  
Old 05-06-13, 13:39
Pleiades Pleiades is offline
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Quote:
Originally Posted by Gas_Up_Lets_Go View Post
The red light puts sort of a red glow all over the engine in the dark, looks weird!
Yeah, I first fired mine up (with the O2 controller fitted) at night and I thought something had caught fire under the tank!
  #28  
Old 05-06-13, 16:17
tacomodo tacomodo is offline
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Great explanation guys. I've been hanging around this forum for a couple of years now seeing "closed loop" this and "open loop" that but never really gotten a sense of what it is. Someone should sticky it
  #29  
Old 06-06-13, 04:24
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Kev Kev is offline
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The XT's fuel injection is explaned in detail in the ASK Kev section.

Some reading can be done in this thread, http://www.xt660.com/showthread.php?t=14746&page=19
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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


Last edited by Kev; 06-06-13 at 10:54.
  #30  
Old 06-06-13, 14:41
Pleiades Pleiades is offline
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Quote:
Originally Posted by Kev View Post
The XT's fuel injection is explained in detail in the ASK Kev section.
...never was there a better reason to join the XT Supporter's Scheme!
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