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YAMAHA

2024 Yamaha Sidewinder S-TX GT EPS With Two-Up Engine Power

2024 Yamaha Sidewinder S-TX GT EPS

The S-TX GT EPS sidewinder delivers the most power on a Yamaha two-up engine. With unmatched performance, it blurs the line between a sporty trail tour package and an all-out lake racer.

Powered by the mighty Yamaha Genesis 998 turbo, this full-featured flagship cruiser stands above all other passenger-capable snowmobiles.

2024 Yamaha Sidewinder S-TX GT EPS

2024 Yamaha Sidewinder S-TX GT EPS
2024 Yamaha Sidewinder S-TX GT EPS

The addition of Yamaha Electric Power Steering (EPS) reduces rider fatigue. Along with its dual tanks providing a more comprehensive fuel range, storage capacity for two, plus all the comfort and warmth one would expect from a luxury sled, there is nothing else like it on the snow.

Yamaha introduced EPS for snowmobiles in 2011, pioneering innovative technologies that reduce steering power and improve steering precision.

The latest generation has reduced weight by more than three pounds and uses ‘brushless’ DC motors.

No worn brushes mean better reliability and thermal performance or the ability to maintain full output power for extended periods.

Variable assist EPS uses magnetic torque sensors to measure steering inputs based on the steering pole’s torque or ‘twist’ resulting from the handlebar inputs combined with ski resistance.

The contactless magnetic torque sensor supplies this data to an integrated control module which, in turn, signals the brushless servo motor to assist steering through the robust worm gear drive assembly.

The system also provides engine RPM and vehicle speed data to a control module that calibrates for increased assistance at lower speeds and decreases as the vehicle accelerates, providing a more balanced and natural feel or ‘connection’ to the terrain.

When the ski encounters sudden forces acting against the steering input, the torque sensor tells the control module to provide additional assistance to counteract or ‘hold’ the negative information.

This effectively reduces the steering effort required while increasing predictability for greater rider confidence and less fatigue.

When the ski encounters sudden forces acting against the steering input, the torque sensor tells the control module to provide additional assistance to counteract or ‘hold’ the negative information.

This effectively reduces the steering effort required while increasing predictability for greater rider confidence and less fatigue.

Sidewinder S-TX GT front sports adjustable fox QS3 shocks at the front and high-pressure gas (HPG) shock aluminum bodies at the rear, offering fade-free performance to handle all the challenges a trail can pose.

Sidewinder S-TX GT EPS Comfort

The driver and passengers are provided with a convenient RCA DC plug for heated helmet glass and an outlet-type socket on the console to power other 12V accessories.

Both the driver and passengers keep warm with independently controlled hand warmers. Passengers also get a functional wind deflector added to the padded rear grip bar to help keep elements out of their hands.

The medium smoke polycarbonate windshield is designed to protect high-mileage riders from the coldest days.

The windshield incorporates a small lip at the top to deflect wind and snow up and down the Rider at high speed, while the widened edges provide additional protection and warmth for the Rider’s hands.

The GT windshield is also designed to accommodate optional rearview mirrors. The windscreen is thicker than the standard windshield to reduce mirror vibration at speed, and pre-marked indentation features for easy installation of accessory mirrors.

The handlebar controls feature a left switch cluster that allows ‘on-the-fly’ access to the multi-step hand and thumb warmer adjuster.

The information on the multi-function gauge can be easily selected with a convenient toggle switch and an electric start button.

The reverse gear switch is also located on the left-hand cluster. The right side of the bar is clean, with an ergonomically shaped throttle lever and a simple stand-alone emergency stop switch.

The Hayes ‘Stealth’ brake cylinders are equipped with composite brake levers that provide excellent modulation for a better feel and powerful braking performance.

2024 Yamaha Sidewinder S-TX GT EPS Features
2024 Yamaha Sidewinder S-TX GT EPS Features

Sidewinder S-TX GT EPS Performance

The nickel alloy turbine body is solid and precise, able to withstand very high temperatures. Powered by premium ceramic ball bearings, Inconel’s turbine blade assembly is exceptionally light and robust.

This results in a moment of low inertia for lightning’s rapid response to exhaust gas inputs. The triple throttle body is used exclusively to enhance further the immediate delivery of compressed air from the impeller to the intake valve.

The Mitsubishi ECU developed by Yamaha uses nine sensors to collect running condition data calculated using a predefined memory ‘map.’

It then adjusts ignition time, fuel delivery, manifold air pressure, and turbo boost pressure to deliver maximum performance under any conditions—reliably.

The YSRC primary clutch and secondary rollers are calibrated for long-lasting and cold operation. They utilize and efficiently transfer the ample torque generated by the Genesis Turbo to the track while minimizing drive belt wear.

The primary shifts out aggressively to use all the power on the beat. The secondary roller quickly reverses and provides an additional ratio through its large pulley to continue accelerating long after the other has stopped.

The SRV chassis combines a load-bearing triangulation structure with a lightweight aluminum construction to create a rider-centric neutral-balance sled. The pyramidal upper frame creates the strength of the chassis without excessive weight.

Sidewinder S-TX GT EPS Handling

The braking effect of a four-stroke engine when the throttle valve is closed significantly impacts the handling and ride character.

Yamaha developed a unique system that uses the Idle Speed Control Circuit (ISC) and ECU maps using throttle valve movement and RPM information to reduce negative intake pressure during deceleration.

Considered the best high-performance terrain track available, the RipSaw I’s 146-inch x 1.25-inch lug design provides the outstanding acceleration, braking control, and handling in various conditions.

The Fox QS3’s adjustable front S-TX GT SPORTS SHOCK sidewinder at the front and Body High-Pressure Gas (HPG) aluminum shock at the rear offer fade-free performance to handle all the challenges that a trail can pose.

Yamaha-designed single-keel skis strike an elusive balance between light steering effort and precision handling in various snow conditions.

Special staggered carbides further enhance the steering response. The unique EPS shim pad assembly works with a rubber saddle block to adjust the pressure point of the carbide.

The overall ski attitude can also be changed by moving the thick spacers on each ski shaft to the opposite side.

2024 Yamaha Sidewinder S-TX GT EPS Price Starting at $19,999.

2024 Yamaha Sidewinder S-TX GT EPS Specs

2024 Yamaha Sidewinder S-TX GT EPS Specs
2024 Yamaha Sidewinder S-TX GT EPS Specs
ENGINE
Engine TypeTurbo 4-stroke / 998 cc
Engine ClassUltra Performance
Clutch / TransmissionYSRC
Fuel DeliveryElectronic Fuel Injection
Fuel Capacity13 gal. (50 L) combined
CHASSIS
Front SuspensionIndependent Double Wishbone
Front ShocksFox Zero QS3 1.5
Front Travel10" (254 mm)
Ski TypeYamaha Stryke Single Keel
Rear SuspensionDual Load 146
Center ShockMonotube Alum-HP Gas 1.5
Rear Shock(s)Monotube Alum-HP Gas 1.5
Rear Travel14.5" (368 mm)
DIMENSIONS
Track / WxLxH15" x 146" x 1.25"
Track TypeCamso Ripsaw I
Ski Stance (ctr to ctr)42" (1,067 mm) adjustable
FEATURES
Electric StartStandard
ReverseStandard
HeadlightLED
DC OutputAutomotive & RCA
Heaterd SeatStandard
20" Tunnel BagN/A
Electric Power SteeringStandard
ColorsMatte Titan / Black

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