Yamaha Electric Bikes

Yamaha power assist system for electric bikes. 3 powerful different motors designed for every type of rider. From the daily commuter, beach cruiser or downhill mountain riders. Yamaha power systems are designed for any job, providing a smoother riding feel over many competitors. 

SELECT A MOTOR TO LEARN MORE

PW-X System

PW-SE System

PW-TE System (coming soon)

Compact & Lightweight

Losing 380g changes the ride.
Introducing a lightweight, compact drive unit.

Making the drive unit more compact, means not simply reducing the overall weight of the machine, but also refraining from interfering with the ideal frame design.
Yamaha thoroughly lightened the design by 380g by adopting a hollow axle shaft, using a thinner driven gear, and reducing the case thickness, while simultaneously reducing volume by nearly 13%. We also adopted the 128mm ISIS interface BB Axle commonly used in MTB in response to expectations for a more authentic ride.

High Output

Get the power you need, when you need it.

"Truly powerful" as Yamaha sees it means ability to deliver the power the rider wants quickly and dependably.
PW-X inherited Yamaha's well-established power and control technology, while adding a fifth mode; Extra Power Mode.
With EXPW mode, the unit better harnesses the motor’s power thanks to the drastically improved cooling effects. It not only improves assist torque in all ranges; compared with conventional models, it also better maintains assistance up to high rpm. In addition, it offers robust support to riders recovering from tight turns or climbing challenging steep slopes.

Quick Response

Updated mechanical components and control program realize a previously impossible level of maneuverability.

To offer a ride directly linked to the rider's intent, Yamaha revised both the mechanical components and the control program in pursuit of a quicker, more direct response to pedaling.
In order to reduce mechanical time lag, we reduced backlash of the ratchet mechanism by one-third. Lighter-weight designs for large moving parts, such as the axle shaft and reduction gear, also contributes to a quick response.
In EXPW mode, we more finely tuned the output characteristics of the motor so that it could retain massive power while delivering a sophisticated blend of quick response and maneuverability.

SPECIFICATIONS

Drive unit Center Motor
Weight 3.1 kg
Rated power 250 W
Max. torque 80 Nm* (EXPW mode)
70 Nm (High/STD/Eco/+Eco)
Max. cadence 120 rpm* (EXPW mode)
110 rpm (High/STD/Eco/+Eco)
Max support Speed 25 km/h
Support Mode (%) 5 modes
-EXPW/320
-HIGH/280
-STD/190
-ECO/100
-+ECO/50

*Depending on battery condition and circumstances

Smooth and Powerful Assist

The PWseries SE inherits all the popular features of the first-generation PWseries and further enhances the pleasure it provides, and it is now Yamaha's new standard model. A compact and lightweight drive unit designed for riding conditions ranging from standard city streets to more challenging, sporty routes, it enables every rider to enjoy an electric assist experience which is powerful yet at the same time smooth and easy to handle. The maximum cadence at which the unit assists your riding performance has been raised from 100 rpm to 110 rpm*.
*Compared to PWseries

Center Mount System

The Yamaha Power Assist System employs a center mount system in which the power unit and battery are mounted close to the pedals to create a low center of gravity. This results in outstanding weight balance and excellent running stability.

The triple sensor system

The triple sensor system anchors the product concept of "Smooth and Powerful". The three sensors are (1) a torque sensor that detects pedaling power, (2) a speed sensor that detects the bicycle's speed, and (3) a crank sensor that detects the number of rotations through pedaling. Thanks to these three sensors, the system is able to offer the rider continuous assistance under all riding conditions. This constant assist makes the "Smooth and Powerful" concept come alive during rides.

SPECIFICATIONS

Drive unit Center Motor
Weight 3.5 kg
Rated power 250 W
Max. torque 70 Nm
Max. cadence 110 rpm
Max support Speed 25 km/h
Support Mode (%) 4 modes
-HIGH/280
-STD/190
-ECO/100
-+ECO/50

*Depending on battery condition and circumstances