AMERICAN MOTORCYCLIST September 2019

Ask the MSF: Electric versus combustion

Q: What differences should I be aware of when riding an electric motorcycle, compared to a motorcycle with an internal combustion engine?

A: As you might expect, the big difference is in the powertrain and power characteristics. Handling, suspension responsiveness, and braking are comparable to gasoline-powered motorcycles within the same category (sport, standard, dual-purpose, etc.) and weight class. But power characteristics are radically different.

Internal combustion engines typically produce maximum torque at higher engine speeds. Electric motors produce near-maximum torque as soon as throttle is applied. Manufacturers design circuitry to control this instant-on power and often integrate selectable and even user-customizable (via smartphone) power delivery modes to tailor the output to ambient conditions and rider preferences.

There are several other differences. With few exceptions, electric motorcycles do not have a clutch or transmission. They may have a range selector, but generally they are “twist and go.”

When it comes to slowing and stopping, since electric motors are free of high-compression cylinders and friction-generating valve trains, they don’t have the typical engine-braking characteristics.

 

 

Because electric motors can serve as electricity generators, electric motorcycles can be designed to put energy back into the battery during braking—sometimes called regenerative braking. In this way, they can provide better range in the “stop-and-go” conditions of city streets than on free-flowing highways.

Gasoline-powered motorcycles usually give better highway than city mileage.

Charging the battery pack is a cleaner, but obviously slower process, than gassing up a traditional motorcycle. Range and charging time must be taken into account when planning longer trips. And, while gas stations currently far outnumber charging stations, options for charging electric vehicles are growing rapidly.

Finally, electric motors are inherently quieter and smoother than internal combustion engines.

The different sound and feel of an electric motorcycle may take some getting used to. The absence of intake, combustion and exhaust sounds also means you will hear other sounds — such as the chain and sprocket, belt-drive, tires, etc.—that are usually masked by the typical noises from gasoline-powered engines and drivetrains.

Regardless of your motorcycle’s power source, you are still operating a two-wheel vehicle in a four-wheel world, and you can benefit greatly from studying the owner’s manual, completing rider training, obtaining your license/endorsement, and maintaining a safety-first attitude.