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Motocross Racing presented a whole new challenge for Trinity engineers. They had to find a way to produce Stage IV power and still get a quick response, with neck-snapping low-end torque for quick turns and triple jumps. Trinity spent months in the Dyno room, tweaking the port profiles to do what nobody thought was possible with a 2-stroke motor, and waxed the competition the first year out, winning the Championship. How Did Trinity do it? It's all about stretching the powerband envelope. With the Stage IV PRO You get all the Low end Performance increases of the Stage II, with the revolutionary Pro porting and cylinder head modification, that gives you 95% of the Stage IV power on the top end. The Stage IV Pro comes race ready with Stage IV pipes & silencers, 35mm carb kit with diffuser channel manifolds, reed cage mod, precision Bore, and power hone on your cylinders, Trinity's exclusive Superlite piston kit, Race wrist pin bearings, top end gasket kit, and the Stage IV timing plate. After installing the Stage IV Pro kit, the only room for improvement is in the ignition department. Trinity recommends you add the Plug-and-Play Dyna FS Computer to take full advantage of the increased airflow with its selection of 3 high performance advance curves.
