Just got my spare throttle body bored out +2mm from 44mm to 46mm.

It was sent to the USA to KDS racing, where Kenny bored it out for me. Kenny specilizes in the Raptor motors. It was bored +2mm with a new throttle plate which is thinner & the spindal was machined thinner as well. Flow testing on other +2mm throttle bodies showed (flow bench tested 270.1cfm stock- 294cfm modified) so more air should = more HP. I will have to reset the PCIII to get the Air/Fuel ratio right.

The detail can be read here. http://www.bluetraxx.com/reviews/kds_throttlebody.htm

Kenny's web page. http://www.kdsracing.com/ Kenny provides fantastic service, with only a few days turn around & posts to anywhere in the world.

I will get my bike on the dyno in a few weeks time with a before & after dyno run.

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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

Looks like a SU I guess the theory is the same. If so another mod that was done on the SU was to thin the leading edge of the butterfly? and to locktite small countersunk screws to hold the butterfly in place providing a flatter surface.

What is beyond the butterfly??

Look forward to seeing your dyno results.

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Colin
09 XTZ in Blue and its nearly Stanard.
My Mods - Peatbog rear rack

Some more photo's

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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

Grande Kev

If anyone else wants to buy another throttle body to send to this american company where Kev sent his to be modded I have a spare one for sale, having 2 will give you the possibility to swap them in case you want to change it back to normal one day.

PM me for price and details it includes a TPS and all fittings.

Please also note I still have 2 engines one full, one in bits minus the barrel and valve head, so if anyone needs another top end to be sent away for modding to 700 you can buy the whole spare set from me.

pm sent

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XT Modifications - XT Supporter's scheme

So you can fit a 700 barrel to the XT, is a 700 Raptor engine a straight bolt in replacement, because damn you can get some good stuff for them.

Well it's not as straightforward as one might think.

If you read the 700cc conversion thread that Kev did to his bike, you will see why, follow this link, please: http://www.xt660.com/showthread.php?t=5895

Whilst the Raptor part will slot in, there are some modifications that need to be carried out because some of the routings don't match, and if you don't have access to routers and accurate instruments in order for you to be able to tap holes and redrill others then your best bet is to get an XT top end and have it rebored.

Yes, have seen that. What I was getting at is, can we do a straight bolt in replacement with a whole Raptor engine and box.

Oh I see what you mean now, we need to ask 2 people, one is of course Kev and the other is Freez, who actually mods Raptors for races, I am not sure if the engine mountings *(frame mountings that is) will match as the raptor frame is obviously different from the xt.