Yes, it’s safe to use the front wheel drive.
The power of the front wheel motors those lvbu ebike kit use are between 250w to 350w, so there is no safety problem. Actually, there are some advantages to using front motor drive:
- It is more efficient to pull the bike compared to push the bike;
- The front motor will balance the weight of the front wheel with the rear wheel to make it stabler;
- It is much easier to install the front wheel than the back wheel.