I had the pleasure to test another XT700 today.

This one is running a stock XT660 sleeve, but it was bored out to a 102mm bore and re- nikasiled. I believe it has a 11:1 Wiseco piston in it, with a stage 1 raptor cam and the head was gasflow/ported.

Unfortunately it was running a dynatek fuel injection controller, instead of the powercommander I normally use, so the midrange fueling is bad and resulted in a bit of power loss.

BUT, none the less, this little sucker is STRONG!!!

It clocked in on my dyno at 56.1HP. Yes, similar to what Kev got in his build, but keep in mind my dyno reads lower than Kev's by around 10 to 12%. That 56.1HP on my dyno would give around 62 to 64HP on the same dyno Kev used.

I posted the dyno run of the 56HP xt700X (686cc) in RED and the blue and green lines are from a stock XT660X (blue) and the green is the same XT660X but with DNA stg2, powercommander and Leo Vince pipes. 47HP form a DNA stg2, PCIII, slip-on bike would give around 52 to 53HP on Kev�s dyno.

As you can see, the XT700 destroy the xt660. I am sure with the installation of a powercommander and correct fueling, we can sort out that midrange drop the XT700 has over the XT660 at around 4000 RPM and make it either very similar and slightly better in power.

Wish Yamaha built the XT's like this from the factory.

Attached Images

xt700.jpg (123.1 KB, 165 views)

__________________


Disclaimer: any mod undertaken, are carried out at owners risk

Nice results, 62hp at the rear wheel, for sure KTM 690 will eat dirt.Thats nice ...XT 700 definitely release the power and wrinkle the asphalt....

how come the two dynos read so differently? are the diff makes or is one not accurate?

Very nice results, at least we now know we can get some more HP from the head being ported.

I would not worry to much on how much HP the bike makes, but what was the gain in doing the mods with a before & after dyno run. As every Dyno would give a difference in HP & torque, the gain is what I always look at.

13.9HP @ 5000Ft + 10% Freez Dyno= Estimated value 15.29HP @ sea level the gain is a good result, mine gained 13.51 HP @ sea level over my standard XT660. I have compared these results from the standard XT660 dyno runs to the fully moded XT700 dyno runs. So we are looking at around 2 to 3 HP gain for the ported head, as the only difference between the bikes is the ported head.

How does this compare to the Raptor HP output with the same mods Freez on your dyno?

As I have said before I love my big bore XT, it really pulls well all the way to the rev limiter. Hopefully with a few people now doing this mod we will improve in HP & torque as the mod results come out.

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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 would agree with you Kev, that the porting will add about 2 to 3 HP.

The 700R raptors with similar setup to this XT700, except for stage 2 hotcams also make around the 56HP mark on my dyno, but you have to keep in mind that the quads pull a lot of extra weight from 2 rear wheels, with steel rims and a very heavy axle.

The stage 2 cam setup would add another 1 to 2 HP at the peak by my estimations, but the torque will not be as good as with the stage 1 cam.

I will soon be upgrading the 56HP raptor to a bigger valve configuration and also we will be changing the Hotcams stage 2 for a megacycle X2 cam.

Indications are that we will pick up 2 to 4 HP with that, maybe more.

the stock bore and stroke 686cc raptor with megacycle X2, bigger valves and around 14:1 compression run around the 75HP mark, but the downside is you need very high octane fuel to run this setup.


Lastly, my dyno reads lower than Kev's because I am at around 5000ft above sea level and they don't compensate correctly for the altitude changes.

__________________


Disclaimer: any mod undertaken, are carried out at owners risk

The Raptor boys love the megacycle X2 cam, but they do not post torque values between the Stage 2 Hot Cam & the megacycle X2 cam.

I will be interesting to see the HP & Torque valves of the mod.

When you are moding a motor for more HP it is hard to keep the torque low down. The min you give the cam more lobe center angle you start to loose torque but gain HP up top. I think I would like a cam ground with the same lift as the XT with the same juration & lobe centers as the Stage 1 Hot Cam. I think that would be a nice cam for the XT.

__________________
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