R&D CLAMSHELL EVC KTM SX 65
R&D EXHAUST VALVE CLAMSHELL KTM SX 65 2009/2010
CLAMSHELL
The stock KTM65 valve housing is not design to be accessed, user friendly it is not. Continual maintenance is required for top performance. Oil accumulation in the valve housing is a constant issue that need to be addressed. Clamshell EVC Valve housing provides a EZ drain screw for oil accumulation and a detachable/hinged top with a single screw on the left side for quick inspection and maintenance.
EVC
KTM's single rate power valve spring is replaced with the "EVC" (EXHAUST VELOCITY CONTROLLER) a progressive rate spring specifically design to optimize the power across the full RPM range, providing a .4hp gain from 8000 RPM to 12000 RPM, a 1hp boost at peak and .4hp after the peak, a real serious improvement not to mention increasing the fun factor!
ALMOST AWESOME
The 2009 KTM65 has a great engine, the heart of this new engine is the nematic (air pressure) activated power valve. This little device when working properly will help to create an amazing power band, however the factory completely missed the mark, the stock setting does not even come close to optimizing the full potential. Non linear pressure pulses in the exhaust pipe will not allow the (stock KTM) linear power valve spring to give optimum performance. The objective with any power valve is to maintain a specific back pressure, not too much and not too little. Our EVC (EXHAUST VELOCITY CONTOL) spring is engineered to do just that, much improvedthrottle response has been achieved along with a meatier midrange, Once the power valve is operating correctly, it's time to tune the porting and crank case volume to get the perfect balance of port timing and pressure pulses, creating an awesome little power plant.
THE TRUTH DETECTOR!!
Mammoth Mountain was the first major competition for our new Dominator Kit, at an altitude of over 8000 feet, this was to be a real test of engine efficiency, with 40 riders on the line and one nasty uphill to determine who's who in the power department, The R&D Dominator Kit did not disappoint, pulling both hole shots tell the story.
*KIT INCLUDES
*Billet Clamshell Housing
*Progressive EVC Spring
Also find the R&D Power Bowl KTM SX 65 on the news section or http://www.split-stream.com/news/general/rd-power-bowl-ktm-sx-65
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