- Top Performance 4-cylinder Genesis 4-Stroke engine
The Top Performance 4-cylinder Genesis engine remains the best combination of pure power and rock-solid reliability. Throw in excellent fuel efficiency, low emissions, and no need for pre-mix oil and it’s easy to see why the Yamaha 4-cylinder Genesis is the most complete engine on snow.
The intake tract on the Apex is 11mm long which maximizes air intake and betters performance. The engine utilizes the pressure waves in the intake tubes as well as the airbox to boost airflow and maximize high RPM performance.
The distance between the throttle valve and intake valve is designed to optimum fuel delivery. The 4-hole injector on the throttle body creates a spray of finely atomized fuel, with droplets of just tenths of a micron in size. The spray is aimed directly at the intake valve skirt for maximum efficiency and performance. The result? Unmatched throttle response and power.
- EXUP and exhaust pipe
Yamaha-exclusive EXUP valve technology controls the exhaust pressure waves for optimum intake and exhaust efficiency, delivering unmatched overall performance with more midrange torque. Additionally, the exhaust pipes have been enlarged to 38mm from 35mm for added exhaust pressure wave efficiency.
- 15 x 128 x 1.25-inch Ripsaw™ track
The Rip Saw™ track design has been widely acclaimed in the industry as the best all-around OEM track for acceleration, cornering bite and everyday trail usage. The Rip Saw™ track development is the result of a collaborative effort between Yamaha and Camoplast®.
- Engine Braking Reduction System
The Top Performance Genesis 4-Stroke engine features the unique Engine Braking Reduction System. The system allows a small amount of air to pass through the fuel injection system when the throttle is released, giving riders more of a "coast" feeling.
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