When I am riding my Carrera Crossfire-E without pedal assist is it normal for the bike to ride like I am riding in sticky thick mud. Going downhill is fine without pedal assist but riding on level roads without pedal assist feels like I'm riding in sticking thick mud. I have also noticed that when I have pedal assist on and the motor cuts out at 27kph I can feel like my bike is getting slower as if I am riding in sticky thick mud. Is this normal?