Hey guys! I have been working on the port work and some new cams that are geared toward smaller motors than we are used to seeing in the Raptor race world. The first test is a head change only from stock to a +1 valved CNC port. The blue line is a reference for a stock engine. The gold line shows the torque loss associated with a a Hotcam III, which will be important on the next test. And finally the red is a head change only. I am pretty happy with a near 7 hp improvement without torque loss down low.The first test is a head change only from stock to a +1 valved CNC port.

Kenny.

Are you talking about a Raptor 700 engine or a XT 660 ?

If it is a 700, will it fit a 660 and what will it cost ??

I note you are from Floyd, VA where they do not sell the XT.

OGR

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We are now retired....so....... lots of this and this and no more of this or this

This is a Raptor 700 (686cc). I wish I could buy the XT here. Yes it is the same head with the exception of the air tube pad not being drilled and tapped. Not a big deal at all. Right now the cost is $500 US for the CNC port + $140 set for the custom ferrea valves (required). Then of course aftermarket valve springs are gonna run about $200.
I am in the process of trying to reduce the cost of some of the components......

nice work Kenny, thanks a lot!
Glad to have you on the XT660.com

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Nice work Kenny, nice bottom end HP & Torque & a good flat spreed of HP across the top end.

Do the rocker arms need to be machined to clear the cam lobes with your cam?

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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

Hi Kenny.

Sorry, can I go back to the 1st dyno runs.

I am getting confused with the dyno runs. Can you explain to me what parts go where and which runs goes with what parts?

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

Here is a preliminary test of my new cam vs the HC III tested above. This cam has 20� less duration than the Hotcam. There are substantial design differences between these cams. You will notice the power flattening off above 6800 RPM on my cam.... This was due to valve float. We have since addressed the valvesprings with a much better design. I am also implementing some timing changes on this cam, such as advancing the cam intake centerline and reducing the lobe separation angle. Add those changes along with a more aggressive lobe and you are gonna see a big improvement across the entire range(especially at the bottom). The dyno chart doesn't tell the entire story here. With the lower duration numbers there is a HUGE improvement in response. Even with these less than expected results, when the cam is tested for HP vs time, my cam was 14hp up @ 1.5 seconds into the pull. I should be seeing some very nice improvements with the next grind.
Ideally I want to make way more power than the XT cam and kill the rev limiter. I already have valves and springs that are more reliable @9,000 RPM than the stockers are @ 7200. And of course the reliability of the rest of this engine is beyond reproach.