Yamaha pioneered the center drive electrically power assisted bicycle in 1993 and we've been continuously refining our industry leading technology ever since.
Yamaha Power Assist Bicycles offers FIVE class-leading drive units: the PWSeries SE, PW-X, the recently released PW-X2 and the ALL-NEW PWSeries ST and PW-X3. All are center mount systems in which the drive unit and battery are secured close to the pedals to create a low center of gravity and outstanding weight balance for excellent riding stability.
Developed specifically for the next generation of YAMAHA e-MTBs, our ALL-NEW PW-X3 drive unit is the smallest, lightest and most powerful drive unit in our bicycle line. Producing higher performance with instant power delivery, the ultra-compact PW-X3 drive unit elevates the feeling of rider machine unity to a whole new level - an experience that YAMAHA calls "Pure Ride".
Drive Unit | Center Mount |
Weight | 6.0lbs |
Rated Nominal Power | 250w |
Max.Torque | 85Nm (EXPW, MTB MODES) |
Max.Support Speed |
20mph |
Support Modes |
EXPW MTB HIGH STANDARD ECO AUTOMATIC SUPPORT MODE WALK ASSIST MODE |
The PWSeries ST features Yamaha's Quad Sensor System to deliver optimized assist levels for all riding conditions. Designed to accommodate high-cadence pedaling the PWSeries ST offers a broader assist range making it the all-round perfect drive unit. Whether you're on or off-road, the PWSeries ST delivers fun, exciting and enjoyable assisted power for all riders.
Drive Unit | Center Mount |
Weight | 7.4lbs |
Rated Nominal Power | 250w |
Max.Torque | 70Nm |
Max.Support Speed |
28mph |
Support Modes |
HIGH STANDARD ECO ECO+ AUTOMATIC SUPPORT MODE WALK ASSIST |
The all-new PWSeries SE inherits the popular features and reliability of our first-generation PW motor and is aimed to win over the hearts of avid cyclists and everyday users. Integrated with a faster speed sensor as part of our rear hub which increases motor response timing to give you the most natural, organic assist feel.
We've also added Bluetooth® connectivity so you can pair it to an aftermarket cyclometer and we have increased the cadence support from 100 rpm to a faster 110 rpm.
Drive Unit | Center Mount |
Weight | 7.7lbs |
Rated Nominal Power | 250w |
Max.Torque | 70Nm |
Max.Cadence | 110rpm |
Max.Support Speed |
20mph 28mph (Civante only) |
Support Mode(%) |
HIGH/ STANDARD/ ECO/ ECO+/ |
Bringing reality in the form of "PURE RIDE" means that you can completely immerse yourself in the ride.
While delivering the fastest motor response to-date, we have taken out any possible interference between rider and machine by revising each and every component. The PW-X is our most powerful drive unit and remains exceptionally smooth with natural assist characteristics that let you forget it is even there.
PW-X is Yamaha's most powerful drive system to date, providing up to 80Nm of torque to meet the demands of a more aggressive ride.
Drive Unit | Center Mount |
Weight | 6.8lbs |
Rated Nominal Power | 250w |
Max.Torque |
80Nm (EXPW mode) 70Nm (HIGH/ |
Max.Cadence |
120rpm (EXPW mode) 110rpm (HIGH/ |
Max.Support Speed | 20mph |
Support Mode(%) |
EXPW/ HIGH/ STANDARD/ ECO/ ECO+/ |
13% more compact design by volume
380g weight reduction
Strong power assist up to 120rpm
EXPW mode adds an exciting 5th power setting
Revised ratchet mechanism drastically reduce backlash
EXPW mode delivers fastest response to date
Yamaha's worldwide acclaimed flagship model, the PW-X, is reborn as the PW-X2, keeping the original "Pure Ride" concept of powerful and sharp pedaling response, and adding improved power support at the higher cadence range.
PW-X2 introduces new Automatic, MTB and Push support modes to Yamaha's most powerful drive system to date, providing up to 80Nm of torque and cadence support up to 170rpm to meet the demands of a more aggressive ride.
Drive Unit | Center Mount |
Weight | 3.1 kg |
Rated Power | 250W |
Max.Torque |
80Nm (EXPW/ 70Nm (HIGH/ |
Max.Cadence |
170rpm (EXPW/ 155rpm (HIGH/ |
Max.Support Speed | 20mph |
Support Mode(%) |
EXPW/ MTB/ HIGH/ STD/ ECO/ AUTOMATIC (HIGH/ |