2021 Yamaha Sidewinder B-TX LE 153

Comfort

• TAPERED TUNNEL DESIGN: The Sidewinder's light weight, two-piece, tapered Mountain tunnel enhances leg comfort and overall ride positioning during long hauls while the reinforced running boards are punched with aggressive boot hold serrations that offer excellent snow evacuation to keep your feet planted where you want them.
• MOUNTAIN SEAT: The lightweight B-TX mountain seat's tall and narrow profile eases rider transitions from side-to-side and improves stand-up ergonomics.
• HANDLEBAR-CONTROLLED DIGITAL GAUGE: Fully-featured and easy-to-read, the digital gauge displays critical information in a glance including speed, fuel level, trip mileage, tach, elevation, temperatures and more. Easily change functions with the switch controls on the left handle bar.
• PUSH BUTTON REVERSE: With just the push of your thumb, you can easily shift to and from reverse. A servo motor shifts the drivetrain into reverse simply and consistently while an audible warning beeper reminds you when the system is still in reverse.
• 20" TUNNEL BAG: The tunnel bag provides additional storage. With it's semi-rigid design, the bag is easy-to-access and water resistant while the quarter-turn, quick-release fasteners make for a quick removal.

Handling

• MOUNTAIN STEERING SYSTEM: A dedicated, tall-steering post delivers optimum ergonomics for stand-up riding. The 5.5" riser and the broad, molded, curved-end mountain bar and incorporated mountain strap deliver ample leverage for off-trail riding. The adjustable system dials you in during sweep and reach to keep you in the sweet spot.
• YSRC HIGH PERFORMANCE CLUTCH SYSTEM: The YSRC primary and roller secondary clutches are calibrated for durable, cool operation. They efficiently harness and transfer the massive torque produced by the Genesis Turbo to the track, all while minimizing drive belt wear. The primary shifts out aggressively to use all of the power while the roller secondary is quick to back-shift and provides additional ratio through its oversized sheaves for continuous acceleration.
• SRV-M FRONT SUSPENSION: The sleek SRV-M Front Suspension is ultra compact to reduce unwanted spindle and suspension drag when in deep snow. The narrow stance allows for extreme maneuverability and delivers aggressive lean angles for incredible side-hilling and powder-turn capabilities. The lightweight, forged aluminum spindles join the widely spaced upper and lower control arms which produces a large caster angle for tight side-hilling and ease of steering. The clean, narrow overall stance and elimination of the sway bar also greatly enhance deep snow agility.
• LIGHTWEIGHT SRV MOUNTAIN CHASSIS: The SRV M chassis combines a load-bearing triangulated structure with lightweight aluminum construction to create a neutrally balanced sled that's centered on the rider. The pyramidal upper frame builds chassis strength without excessive weight.

Performance

• DUAL-PISTON BRAKING: A dual-piston brake caliper applies braking forces directly to the drive shaft with a wave-style, lightweight drilled rotor. The LE-only rotor removes 1 lb. of rotating mass from the vehicles driveline which transfers all of the Sidewinder's available horsepower to the snow. The Stealth master cylinder and composite Stealth brake lever offer excellent modulation and ergonomically precise operation.
• HIGH TECH TURBO: Able to withstand highly elevated temperatures, the Nickel alloy turbine body is extremely strong and precise. Supported by premium ceramic ball bearings, the Inconel turbine blade assembly is very light and strong which yields a low moment of inertia for a lightning quick response to the exhaust gas input. Triple throttle bodies are used exclusively to further enhance the quick delivery of compressed air from the impeller to the intake valves.
• MITSUBISHI ELECTRONIC CONTROL UNIT: The Yamaha-developed Mitsubishi ECU uses a series of 9 sensors to gather running condition data to compute a predetermined memory map which will adjusts ignition timing, fuel delivery, manifold air-pressure and turbo boost pressure to produce maximum performance under any condition.
• TRIPLE THROTTLE BODY INDUCTION: The Yamaha Genesis turbo engine's intake system uses three separate throttle bodies that are positioned very close to the intake valves to create a quick engine response with little to no lag. This is something not see in any other production turbo on the planet.
• ELECTRONIC AIR BYPASS VALVE (ABV): Unlike conventional turbo 'blow-off' valves, the Yamaha ABV redirects air pressure back into the intake side of the compressor which prevents surge and maintains impeller speed.
• LIQUID COOLED TURBO BODY: When the engine shuts down, the convection energy produced by the super-heated coolant at the turbo head keeps circulating without the coolant pump in operation which eliminates the need for an engine cool down cycle, all while maintaining the turbo components' durability.

Top Features

• 998 GENESIS TURBO ENGINE: The 998 Genesis Turbo Engine is unmatched when it comes to delivering incredible power. Every engine component from intake to exhaust is dedicated to producing uncompromised performance, earning the respect and reputation as the industry's highest achiever.
• FOX® ZERO QS3 SHOCKS: The Limited B-TX receives a top shelf of Fox QS3 shock absorbers. The front suspension is equipped with twin, coil-over QS3 with remote reservoirs and three-way QS3 damping adjusters. The front skid frame arm is fitted with the QS3 1.5, and the rear arms have QS3 2.0 with remote reservoir and three-way damping adjuster to perfectly matched the front end. These shocks all include Fox FIST ice scraper technology, velocity sensitive damping and high quality hard chrome rods with T6 anodized bodies.
• 40" SKI STANCE: With quick transitions from side to side, the 40" ski stance hits the sweet spot between cornering on-trail and deep snow carving off-trail. The wide profile and single keel design of the Yamaha Mountain Skis compliment the narrower stance for off-trail agility and on-trail confidence.
• 153" X 2.25" POWER CLAW TRACK: Born in the Rockies, the 2.25" lugged Camso® track offers up the best traction for off trail play. The longer 153" length gives plenty of float and lift to keep you going and won't get you stuck in tight, challenging terrain.
• STEALTH CONTROL SYSTEM: The handlebar controls feature a left-sided switch cluster for “on-the-fly” access to the multi-step hand and thumb warm adjusters, the push button reverse gear shift and the multi-function gauge that can be easily select information with a convenient toggle. On the right side, a clean bar hosts an ergonomically-shaped throttle lever and a simple, stand-alone emergency stop switch. The Hayes 'Stealth' brake cylinder is equipped with a composite brake lever that, coupled with a lightweight caliper, offers better feel and powerful stopping performance.