Is my engine still guaranteed?
The presence of a kit automatically voids the warranty you have on your engine. If you remove the kit, your bicycle dealer may recognize that you have unplugged your engine.
What is the impact on the autonomy of my VAE?
The autonomy of your electric bike depends on your behavior, whether you have a kit or not. For example, if you pedal steadily at 35 km / h, you will use less battery than a person who selects a "Sport" mode and pedaling little. Also, badly depends on the terrain, the wind and the maintenance of your battery. A regularly charged battery is a battery that lasts longer.