Electric drivetrain conversions in classic motorcycles have traditionally been the realm of outliers. While the automotive industry embraces the electric ‘crate’ motor trend, options for electric motorcycle conversions have been limited. However, change is afoot. This article explores the emergence of electric motorcycle conversions, with a focus on a recent project by Mototherapy that targets beloved BMW boxers.
Mototherapy’s ‘Ride Mercury’ Project
Mototherapy introduces its innovative project, ‘Ride Mercury,’ with the ‘R01’ prototype, built on a classic BMW R75 foundation. The company’s founder, Jean-Marie Raymon, emphasizes their primary goal of revitalizing motorcycles with character. Functionality is at the core of their approach, aiming to provide a conscious and useful enhancement rather than creating showroom novelties.
Seamless Drivetrain Integration
Ride Mercury leverages the versatility of the BMW R75 to develop a full drivetrain that effortlessly fits into the chassis, replacing the OEM engine, transmission, and airbox. This plug-and-play system requires no frame modifications and showcases impressive performance. The electric motor delivers 20 kW, 340 Nm of torque, and 30 hp to the rear wheel, with a current range of 150 km and a six-hour onboard charging time.
Innovative Design Elements
The article delves into the clever packaging of components, emphasizing the use of bespoke aluminum housings and structural steel. Four batteries are strategically placed, mimicking the boxer’s iconic cylinder heads. The electric motor, replacing the transmission, connects directly to the original driveshaft. The in-house design approach allows for continuous evolution, evident in a second-gen design with improved ‘cylinder heads’ placement and enhanced ventilation. Various options for the front engine cover are also in development.
Proof of Concept
The R01 serves as a proof of concept, demonstrating the feasibility of retrofitting vintage motorcycles with electric drivetrains without a complete redesign. Notable upgrades include the headlight’s internals and a digital dashboard linked to the motor’s controller. The article highlights the crew’s efforts to repurpose the OEM fuel tank into a storage space or an upgraded charging port.
Custom-Built Electric BMW R75s
While a ‘crate’ system is not available yet, Ride Mercury offers complete electric BMW R75 builds at a starting price of €29,500 (approximately $31,233). Each build includes a full refurbishment of the donor bike and offers various custom options. The company’s co-founder, Cédric De Azevedo, emphasizes their approach to retrofitting, which goes beyond a simple engine conversion.
Environmentally Friendly Retrofits
The article explores the ecological aspect of retrofitting, noting that Ride Mercury’s statistics indicate retrofitting a bike or car with an electric powertrain can be up to 50% more environmentally friendly than manufacturing a new electric vehicle. This approach offers a stylish and sustainable way to embrace green mobility.
