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  # 1  
Old 11-11-10, 10:55
richardsracingmad richardsracingmad is offline
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XT660 to XT734 Conversion

I am using Steve Ruth in Suffolk UK, to build the engine, and Cuervo Racing / High Desert Dyno in the USA for the parts and Cylinder Head porting.

My bike is a 2008 XTR, fitted with a DNA Stage 3 Airbox, a Power Commander, and Carbon Cans Exhaust.

I have already sourced a spare engine to use.

Specifications

+1 mm Valves
Uprated Springs
Cuervo Racing Ported/Flowed Cylinder Head
High Desert Dyno HDD5050 Camshaft
Bored out to 734cc with a CP 105.5mm 11:1 Piston
Bored out throttle body 2 or 3mm


To fit this piston, Steve is going the route of : boring out the existing Cylinder, and fitting a liner. This seems an easier option than fitting a Raptor Cylinder, and doesn't need Nikasil Plating either.

A more "lengthy" thread on this conversion is at
http://www.xt660.com/showthread.php?t=14763
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2008 XTR Mods : DNA Stage 3 Airbox, PC111, Carbon Cans Ovals, Steve Ruth built XTR734cc Big Bore with - High Desert Dyno (HDD)/ Cuervo Racing Gas Flowed / Ported Head fitted with +1mm Valves & uprated Springs, HDD 5050 Camshaft, HDD +3mm Throttle Body, CP 105.5mm 11:1 Piston, Custom Mapping, Piasini ECU, Renthal 613-01, Barkbusters VPS, Pivot Pegz, Touratech Bashplate, Foam Grips, Kev's O2 Sensor Mod, Kev's Extra Coolant Cooler, Wilbers Progressive Fork Springs and Rear Shock

Last edited by richardsracingmad; 11-11-10 at 11:34.
  # 2  
Old 15-11-10, 19:33
dl700 dl700 is offline
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Quote:
Originally Posted by richardsracingmad View Post
I am using Steve Ruth in Suffolk UK, to build the engine, and Cuervo Racing / High Desert Dyno in the USA for the parts and Cylinder Head porting.

My bike is a 2008 XTR, fitted with a DNA Stage 3 Airbox, a Power Commander, and Carbon Cans Exhaust.

I have already sourced a spare engine to use.

Specifications

+1 mm Valves
Uprated Springs
Cuervo Racing Ported/Flowed Cylinder Head
High Desert Dyno HDD5050 Camshaft
Bored out to 734cc with a CP 105.5mm 11:1 Piston
Bored out throttle body 2 or 3mm


To fit this piston, Steve is going the route of : boring out the existing Cylinder, and fitting a liner. This seems an easier option than fitting a Raptor Cylinder, and doesn't need Nikasil Plating either.

A more "lengthy" thread on this conversion is at
http://www.xt660.com/showthread.php?t=14763

Richard, your parts will be on their way shortly, this will be a great build but require some tuning at your end, we hope all goes well!
  # 3  
Old 15-11-10, 21:03
richardsracingmad richardsracingmad is offline
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thanks Dan...it will be fun!
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2008 XTR Mods : DNA Stage 3 Airbox, PC111, Carbon Cans Ovals, Steve Ruth built XTR734cc Big Bore with - High Desert Dyno (HDD)/ Cuervo Racing Gas Flowed / Ported Head fitted with +1mm Valves & uprated Springs, HDD 5050 Camshaft, HDD +3mm Throttle Body, CP 105.5mm 11:1 Piston, Custom Mapping, Piasini ECU, Renthal 613-01, Barkbusters VPS, Pivot Pegz, Touratech Bashplate, Foam Grips, Kev's O2 Sensor Mod, Kev's Extra Coolant Cooler, Wilbers Progressive Fork Springs and Rear Shock
  # 4  
Old 16-11-10, 10:51
A7 UFO A7 UFO is offline
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this I'll watch with interest
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  # 5  
Old 16-11-10, 11:03
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Kev Kev is offline
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Should fly.
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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

  # 6  
Old 16-11-10, 14:30
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cdo1uk cdo1uk is offline
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looking forward to the dyno prints :-)
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