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Powerful and lightweight multi-purpose eBike drive! Since developing the world's first production eBike in 1993, Yamaha has accumulated extensive experience in the eBike business - and the brand has earned a good reputation worldwide for the high reliability of its eBike systems. Constantly developing sophisticated new technologies, Yamaha is still able to offer European eBike manufacturers an advanced range of high-quality drive units.
new drive unit of the PW S2 series
With a comprehensive product range of compact, high-tech drive units covering most areas of the eBike market, Yamaha's range for 2023 expands with the launch of the new PW S2 series, which offers various new and improved features in the Sport and Trail category. further expanded. The drive unit of the PW S2 series was developed according to the motto "less is more" and is significantly lighter and more powerful than the drive unit of the very successful PW ST series introduced in 2018.
This new eBike system offers a natural and pleasant riding experience and was developed to meet the needs of European eBike manufacturers. The new PW S2 series, which builds on the proven strengths of the PW ST series, takes the driving experience to a new level. This makes this versatile drive ideal for everything from commuting and general daily use to country trekking, weekend trips and mountain rides.
Higher torque to weight ratio
With a maximum torque of 75 Nm, the compact new drive from the PW S2 series is more than 7% more powerful than the drive from the PW ST series. The weight has been reduced to just 2,85 kg (16% less than the previous model), making the drive one of the lightest in its class. This highly desirable combination of increased power, reduced mass and a 20% reduction in volume ensures that the new PW S2 range achieves one of the highest torque-to-weight ratios in the segment of large-displacement, versatile engines, making it strong, on-the-fly and user-friendly has performance characteristics.
Greater freedom in frame design
The reduced dimensions of the new unit give eBike manufacturers even more freedom when designing next-generation frames, featuring features such as increased ground clearance for better performance on technical terrain. The 20% more compact layout of the PW S2 series also allows bike manufacturers to develop optimized frame designs with shorter chainstays, which can increase overall strength for better maneuverability and rear wheel traction. From an aesthetic point of view, the reduced size of the PW S2 series drive unit offers Yamaha's partner bike manufacturers the opportunity to bring a clean and minimalist look to the next generation of sport and trail models.
Improved pedaling efficiency and feel
The new PW S2 series has a bottom bracket spindle that is 22,8 mm shorter than the PW ST series. This provides improved efficiency and a better pedaling feel, which combined with the automatic assist mode means an extremely light and comfortable ride. The new ISIS bottom bracket spindle of the PW S2 series offers increased strength and makes this new mid-range drive unit ideal for the needs of e-MTB riders. Being fully compatible with a double front chainring, the compact new drive unit opens up more possibilities for bike manufacturers.
Key features of the PW S2 series
- New model for 2023
- Lighter, smaller and more powerful than the successful PW ST series
- Leading specification in the segment
- Universal sports and trail applications
- Smooth and natural acceleration
- Increased maximum torque of 75 Nm*
- Competitive weight of 2,85kg - 0,5kg (16%) lighter compared to the PW ST range
- Higher torque to weight ratio*
- New ISIS bottom bracket spindle
- 22,8 mm shorter bottom bracket spindle - comfortable and efficient pedalling
- Yamaha Zero Cadence technology for instant support
- Automatic support mode - for simple and intuitive e-biking
- Reliable, maintenance-free design
* PW S2 series compared to PW ST series
New Display B: Elegant, intuitive and easy to use
The new drive unit of the PW S2 series is complemented by the new Display B - a user interface designed to provide easily accessible information and to be easy to use. This simple, durable and reliable system is aimed at the recreational rider who appreciates an out-of-the-box design that sets up with minimal effort.
Clear and simple layout
Yamaha's new Display B is the perfect partner for the new PW S2 series drive unit. It has a number of carefully selected functions that provide the driver with important information that is at the same time easily accessible and legible. The 3 inch LCD display shows large format information in English, German, French, Dutch, Italian and Spanish. It is installed in a central position and ensures that the handlebar area looks tidy and uncluttered.
Quick and easy daily setup
Display B is a system ('switch on and drive') that recalls the user's previously selected settings, e.g. B. the driving assistance mode or the lighting status (on/off). Its intuitive design allows you to change settings quickly and easily. To protect against theft and the weather, the device can be removed from the holder with a flick of the wrist. There is also an option to attach the display with a screw to make it even more secure.
Compatible with smartphones
The central position of the user interface frees up plenty of space on the handlebars for a smartphone holder and enables it to be powered via a USB Micro-B 1A connector, which prevents the smartphone battery from draining when using energy-intensive apps such as GPS.
Key Features of Display B
- Easy to use, easy to read
- 3 inch LCD screen
- Uhr
- Ready-to-use design
- Important information in large format
- Saves the settings when the system turns off
- Removable with one hand
- Smartphone compatible design
Of course, that was far from it. Our tuning magazine has countless other tuning reports for two-wheelers in stock. We regularly deal with the topic of e-bikes, pedelecs and ATV tuning. Do you want all posts related to the topic E-scooter, e-bike, UTV, ATV / quad tuning see? Just click HERE and look around. Or is a small extract enough? Then take a look at the following three articles.
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Yamaha introduces the new PW S2 Series Drive Unit and Display B
Photo credit: Yamaha
