FAQ

01

What is an e-bike system?

An e-bike system couples human power and electric power using an electric motor to assist the pedaling power of the rider. Yamaha has been a pioneer of the development of such systems.
In 1989, Yamaha succeeded in developing a prototype mounting a new mechanism we called the "Power Assist System." This prototype became the base of what would become the PAS electrically power-assisted bicycles, marketed in Japan since 1993. The focus of our R&D efforts was on what would become the core technology for the lineup of PAS bicycles – the Power Assist System.

02

Does Yamaha offer its own e-bikes or exclusively supplies e-bike systems to other brands?

Yamaha is engaged in both activities, but availability of products depends on where you live.
Yamaha started marketing electrically power-assisted bicycles in Japan in 1993, under the Yamaha's own brand: PAS. Soon, the system caught the attention of other bicycle manufacturers, and Yamaha started to supply what we called the EKIT, with drive unit, battery, display and other components. Today, Yamaha branded e-bikes are sold in Japan and in the USA. E-Bikes from partner brands eqquipped with the Yamaha system are sold in Europe, North America, Japan and other territories.

03

Can the Yamaha e-Bike Systems be installed on any bicycle?

The Yamaha system is pre-installed by the bike manufacturer, and cannot be retrofitted into a traditional bicycle.
Yamaha works closely with the bicycle manufacturer to adjust the motor behaviour to the e-bike specs (including tire size, drivetrain, etc).

04

Does Yamaha offer any warranty for the system?

Please check warranty conditions with the bike manufacturer.

05

Can I join racing events with my bicycle powered by the Yamaha system?

Please check the race regulation with the event organization.

06

I want to join a race event, and the organization is asking for some documents. Where can I get them?

Please get in touch with the bike manufacturer.

07

Can I tune the system?

To avoid infringement of regulation and damage to the bike the user must not atempt to tune the system.

01

Is it necessary to do any regular maintenance to the drive unit, like greasing?

It is not necessary. The drive unit is basically maintenance-free. It is reccommended that the user keeps the whole bike in good condition overall.

02

May I use a high pressure water jet cleaner?

Please do not apply a direct water jet to the drive unit and battery.

03

I dropped by bike in the water. Will it be OK?

If you remove the bike from the water soon after dropping it, the water will not get inside the system. Please clean the bike and take a check-up at the bike dealer.

04

The speed sensor was damaged. How this affects the ride?

To avoid infringing the local regulation, the drive unit output will be limited. The system will provide some assist, but depending on the gear, the assist will be cut before the bike reaches 25km/h.

05

The frame of the bike was damaged and I want to use the e-Bike Systems in a new frame. Is it possible?

The system data is designed to match the specific bike specifications from the bike manufacturer. If you use the system in a different frame, there is a risk that the bike becomes non-compliant to regulation. Only use the system with the original bike from the manufacturer.

06

Can I change or update the drive unit software?

Software or firmware updates are not necessary.

01

What is a smart way of making the life of the Li-ion battery last as long as possible?

The battery's capacity decreases over time but proper storage will maximize its service life.

02

Is it necessary to apply grease to the battery terminals?

Do not apply grease on the terminal of the battery. It is sufficient to keep the battery clean.

03

How to store the battery when the bike is not used for long periods (like during winter time)?

Decrease the residual battery capacity to where one or two battery capacity indicator lamps are lit, and store it indoors in a cool 15–25 °C, dry place.
• Check the residual battery capacity once a month, and if only one battery capacity indicator
lamp is flashing, charge the battery pack for about 10 minutes. Do not let the residual battery capacity become too low.
• If you leave the battery pack at "full charge" or "empty", it will deteriorate quicker.
• Due to self-discharge, the battery slowly loses its charge during storage.

04

The cruising distance with support is getting shorter. What is the reason?

Please check the bike general condition first: tire pressure and chain condition have a big influence in cruising distance.
Subsequently, follow the instructions in the battery manual:
Are you fully charging the battery pack?
Charge the battery pack until full (F).
Are you using the system under lowtemperature conditions?
Normal traveling range will be restored when the ambient temperature rises.
Additionally, storing the battery pack indoors (in a warm location) before use will improve traveling range under cold conditions.
Is the battery pack worn out? Replace the battery pack.

05

How long is the battery charging time?

Approximately 3.5 hours for 400Wh and 410Wh, 4.0 hours for 500Wh, and 5.0 hours for 600Wh type batteries.

01

I want to keep the lights of the bike always on. Is it possible?

Currently this setting is not available.

02

I want to turn the "Walk Assist" function always off or on. Is it possible?

This setting is done at the bike manufacturer's factory and cannot be changed by the user.

01

In case of further questions, whom should I get in touch with?

Please get in contact with the bike dealer or with the bike manufacturer. Yamaha offers service support to the bike manufacturer.