I'm a new member and a new XT660R 2004 model owner . Cant get rid of the "surging" from the feul injection. I've adjusted the CO and tested it from 15 up to 20, it is much better , but its still there. Even when bike is idling , you can hear the revs dropping for a moment. Snorkel is removed and KN filter is fitted. The so called "surging" is really anoying on constant speeds. Need to sort this out. Otherwise a really nice bike. Any Suggestions?

sergeing/jerkyness..
welcome to the wonders of XT ownership..
90% can be eliminated.. Check the cush drive
rubbers ,, you want NO play in the sprocket..
Simple to sort with a old tube..(How to is posted on the site)
The rubbers were responsable for most of
the serge/jerking on my XTR...

pete

As petenz says as the XT 660 is a big single it gives its chain/sprockets and cush drive rubbers (rubbers in side the rear sprocket carrier) all a hard time.

First check if your cush drive rubbers are ok and the rear sprocket doesnt have too much rotational play, if it does you can either buy new cush drive rubbers, or pack the old ones out with old inner tubing.

Second make sure the chain slackness is set correctly as with a slightly slack chain makes the feeling of this surging very much more noticable than if the chain slackness is seet correctly.

If you still find the surging annoying you now need to start modding the fuel in/out of the bike. Youve already taken the snorkel out and changed the filter so it would be advicable to get a kev fuel mod which allows you to trick the ECU into adjust the fuelling for a better burn/feel. Or you could get a PC111 or similar but they cost ��� and require dyno time to setup properly

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Plough on

Well I have increased the CO by 10 points on my 2011 XTX and it was like getting a new bike!!! I have the same set up ie K&N filter plus snorkel removed. Try increasing another 5 on the CO?? I have just ordered a set of Leo Vince pipes plus a Kev Fuel Mod. Will let you know my progress!!

A bit more info for you guys, not all year XT660X/R's are equal.

http://www.xt660.com/showthread.php?t=8546

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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

I have the same issue with my 2004 xtx driving me mad...its either idle or high reving will look at what ECU I have as well

Alex

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I paid for 2 01 ECU's when my bikes were under warranty, as the surging drove me around the bend.

I still have a very good 06 XTX/R complete wiring loom if anyone wants to convert their 07> back to a 06 XTX/R ECU with no O2 sensor.

__________________
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

Kev would your fuel mod work on a 2004 xtx or is more for lambda sensors bikes? I've now found it stops surging when pulling clutch half way

Alex

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It will help but with a 2004 00 ECU it's the advanced ignition timing that is partly responsible for the surging at small throttle openings, so you can add fuel & it will only help 50% to reduce the surging on the 00 ECU.

With a 01 ECU + fuel mod it will reduce the surging by 95%, the other 5% is it's a big single cylinder bike.

__________________
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

Got a feeling mine is 00 ECU need to have a look, but can i adjust the timing in anyway Or can it be done by a power commander?

Alex


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