Yeah, the car weighs in around 600kg - that coupled with the bikes original gearing (very long first gear (compared to a car), quite close ratios), it really struggles to get going. There's really not much torque, and obviously uses the revs to get the power. The electric motor helps normal driving at lower revs, and just adds to the torque curve throughout in the racey-er mode, meaning it brings power up a fair chunk (50bhp if i remember correctly, bringing the 170bhp (at the wheel) up to 220bhp).