If you have the magnet on the crank and you have any problems giant will know and void your warranty I know because I have a fastroad e bike cost $1600 too replace my motor but I was only going 10km when the motor broke the pinion gear.I have derestricted this one too as it's so annoying to have it cut out at 25km then it's like dragging a car behind you.Why should I be restricted to 25km when people on normal bikes can go as fast as they want it's bullshit cars 110km motorbikes 110km I'll be taking it easier though.Get people on e bikes derestrict them even if it's to 40km give us a break