Installation guide is NOT provided and professional mechanic installation is highly recommended. Doesn't come with installation tools, you will need some basic tools to install this bike Actual colors of the product may vary slightly, due to different device screen settings, lighting conditions, slight differences in product finishes, and other factors Speed limit and range are for reference only, it depends on the weight of the rider, road, and weather conditions The AU regulations dictate that a kit must not exceed the rated power of 250W to be road-legal. 350W/500W Motor is not path legal, 350W/500W is only recommended for off-road or private property use only. Speed and range depends on weight, road and weather condition. Batteries lose capacity overtime naturally, so the distance per charge will decrease overtime Poor maintenance and any modifications to the product or components