Hey people.

recently ditched my boring CBF and onto a much more exciting XT660X.

it is however a snatchy juddery ******, and i'm interested in the fuel/air mods that are being discussed on the site to smooth it out but i'm a technological moron, and would love to meet up with some other bikers to get some tips and advice!

any regular meetups around London?

Thanks

DS

and to

if you go to Ace Cafe on weekends you are bound to find a few XT's there.

However it is not difficult to follow our "fuelling fix" instructions, just click on the link below and follow the step by step guide, then when you are more savvy, and you become an XT Supporter you can even ask Kev for a one to one session by pm and he will get your bike flying with full colours!

http://www.xt660.com/showthread.php?...=Co+adjustment

Thats great, my co2 number was at 8 so ive increased it to 15 but it hasnt seemed to have made a huge ammount of difference. When driving <30mph and come off the throttle there is a big jerk when rolling the power back on.
There is no slack in the chain, it is seriously annoying when filtering!

Its an 04 plate. Could the ecu have anything to do with it?

Cheers!

Dave

Welcome aboard Dave

See if you can find anything useful in these threads:

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

http://www.xt660.com/showthread.php?t=519

http://www.xt660.com/showthread.php?t=948

http://www.xt660.com/showthread.php?t=56

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hi!

i'll look those over - thanks.

and will pop up to the Ace on the weekend, say hi if you see me, grey bike, white helmet, confused look on my face!

D

The ECU in the 04 bikes was indeed one of the "troublesome" ones. As well as the TPS was recalled in all the bikes from 2004 to 2005 included.

My friend you need to get on to Kev (obviously after you've joined the XT Supporters) because his help is much needed in this case, the 2004 bikes were a bit of a dark horse, and you need Kev's help to get your bike to work fine, but in the meantime I suggest you increase the tickover (idleing speed) to at least 1450-1500rpm to ensure that on close throttle the bike doesn't starve of fuel and cut out.

Ahoy there Capt'n!

checked with a YAM dealer and the TPS was changed in '06.

having ridden it a bit more since the o2 change it does seem to be reacting a bit better but still hit and miss when rolling power back on into a corner, as to whether or not i'll end up in a hedge...

the bike hasn't had a problem with cutting out but i assume because the TPS has been fixed.

cheers for the tips. off to sign up to supporters!

cheers!

Seems all has been covered in the referring links, I would add one to it & that is your rear sprocket holder dampening rubbers, grab the rear sprocket & see if you can move it back & forwards, there should be no free play in the rubbers, if it has free play it will make the bike have a delay or jolt when coming off & on the throttle.

If there is free play renew the rubbers or carry out our rear sprocket rubber mod.

8/ Free play in sprocket holder mod.
http://www.xt660.com/showpost.php?p=113529&postcount=1
http://www.wemoto.com/bikes/Yamaha/X..._Rubber_-_Set/

The 04's were the hardest 660's to get smooth with the 00 ECU's, I would also do this mod for better throttle control.

13/ Twitchy Throttle, good mod to do.
http://www.xt660.com/showthread.php?p=154983#post154983

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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 /
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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