Goo points :Easy installation on my usual bike, good performance (+/- 45 kms for one charge). Easy to use . Possible use without the engine . Bad points : Communication with your company No french speaking. Very Bad information on the moment of delevery which took a long Time without précise information. And last but not least ,The position of the very heavy original battery on the handlebar IS not only incomfortable but Can be really dangerous when the speed increases (very fast and violent Moving of the front fork). And the Price of your so called bargain update with a lighter one much to expensive. That's all folks . To be used integrally ( I insisté).