The R1S was designed to compete but built for the street.
7. MotoGP® Styling
The styling on the R1S is shared with the YZF-R1M® and YZF-R1® and inspired by the YZR-M1®, purposely sculpted for maximum aerodynamic efficiency.
Cutting-Edge Crossplane Crankshaft Engine
The R1S’ 998cc in-line 4-cylinder, crossplane crankshaft engine features steel fracture-split connecting rods and lightweight forged pistons. This race-derived engine delivers high horsepower and a strong pulse of linear torque.
Compact Stacked Transmission
A 6-speed transmission is built to match the engine’s delivery and character for excellent response. The transmission "stacks" the input/output shafts to centralize mass and to keep the overall engine size shorter front to back, which optimizes engine placement in the frame for outstanding weight balance.
Advanced rocker-arm valve actuation uses the arm’s lever ratio to allow for larger valve lift while using lower cam lobes and reduced spring pressure, further boosting power.
Compact Exhaust System
The R1S is equipped with an advanced exhaust system crafted from titanium and stainless steel. Plus, the compact midship muffler contributes to mass centralization.
Yamaha's Assist and slipper clutch is used to give the rider more confident downshifts when entering corners aggressively, while still smoothly handling the torque of the high-output inline-four motor.
Inertial Measurement Unit (IMU) uses six axes of measurement: It consists of a gyro sensor that measures pitch, roll, and yaw, as well as an accelerometer, or G-sensor, that measures acceleration in the fore-aft, up-down, and right-left directions… all at a rate of 125 calculations per second. The IMU communicates with the ECU, which activates the technologies in Yamaha Ride Control (YRC). YRC includes Power Mode, Traction Control System, Slide Control System, Lift Control System and Launch Control System. All these systems are adjustable and can be saved within four presets in the YRC system.
Power Delivery Mode (PWR), similar to the earlier “D-Mode” system, lets the rider choose from four settings of throttle-valve opening rate in relation to the degree of throttle-grip opening to best match their riding conditions.
Lean Angle Sensitive TCS
Variable Traction Control System (TCS) reduces rear wheel spin when exiting corners, calculating differences in wheels speeds and in relation to lean angle. As lean angle increases, so does the amount of intervention… with ten separate settings (off and 1-9) enabling the rider to dial in the exact level of control needed.
Slide Control System (SCS), the first of its kind on a production motorcycle, comes directly from the YZR-M1. It works in tandem with the IMU, where, if a slide is detected while accelerating during hard leaning conditions, the ECU will step in and control engine power to reduce the slide. This too can be adjusted by the rider. Four settings (1-3 and off).
Lift Control System
Lift Control System (LIF) IMU detects the front to rear pitch rate and the ECU controls engine power to reduce the front wheel lift during acceleration. Four settings (1-3 and off).
Race Start Control
Launch Control System (LCS) limits engine rpms to 10,000 wide open throttle. It maintains optimum engine output in conjunction with input from the TCS and LIF systems to maximize acceleration from a standing start. Three setting levels regulate the effect (1-2 and off).
The R1S uses YCC-T® (Yamaha Chip Controlled Throttle), fly-by-wire technology providing optimum power delivery, as well as YCC-I® (Yamaha Chip Controlled Intake), which is a variable intake system that broadens the spread of power in both low and high rpm.
Full Color Instruments
The R1S features a brilliant full-color, thin-film transistor LCD meter, including front brake pressure and fore/aft G-force readouts, giving the rider even more feedback from the machine. It features both street mode and a track mode that focuses on performance information, such as YRC settings, a zoomed-in view of the tachometer in the upper rpm range, a lap timer with best lap and last lap feature, gear position indicator and speed.
The aluminum Deltabox® frame and magnesium subframe contribute a light weight and compact chassis design. The aluminum frame is both strong and flexible, and uses the engine as a stressed member of the frame for optimal rigidity balance and fantastic cornering
Fully Adjustable KYB® Fork
The R1S features an advanced inverted KYB® front fork with 43mm inner tubes and a 4.7-inch stroke with full adjustability, for an exceptional balance of feedback and traction.
Linkage-Type KYB® Shock
The fully adjustable KYB® shock has a rear bottom link pivot position that is optimally placed to provide exceptional handling, and excellent transmission of engine torque to the road.
Compact Chassis Dimensions
The YZF-R1S’ wheelbase is 10mm shorter than the 2014 YZF-R1, adding to cornering performance. However, the R1S retains a 40.5% ratio of swingarm length to wheelbase for superb handling.
Aluminum Fuel Tank
An aluminum 4.5 gallon fuel tank, weighing in at a full 3.5 pounds less than a comparable steel tank, further reduces overall weight.
Powerful, Controllable Brakes
The track developed and tested racing ABS and Unified Braking System provide maximum braking performance. UBS inhibits unwanted rear end motion during braking by activating the rear brake when the front brake is applied, with force distribution based on the bike’s attitude and lean angle. ADVICS 4-piston radial mounted front calipers ride on big 320mm rotors for excellent stopping power.
Dynamic “M1” inspired styling that creates a more compact profile with improved aerodynamics.
Compact LED Headlights
LED headlights are both lightweight and compact allowing for a more streamlined design and layout of the front face.
LED front turn signals are integrated into the mirrors for improved aerodynamics, while an LED tail light is stylish and highly visible.
Factory Level Telemetry
Available as an option is the Yamaha-exclusive Communication Control Unit. The CCU allows riders to communicate with the vehicle via Wi-Fi through Yamaha’s exclusive Y-TRAC smartphone and tablet app. The system is comprised of the CCU and GPS antenna, running data can be recorded via a data logger, with course mapping and automatic lap timing managed by GPS. This data can then be wirelessly downloaded to the Android® or Apple® iOS® app where it can be analyzed. Changes to settings can be made via the Yamaha Ride Control (YRC) setting app and then uploaded back to the R1S.