Steering setup on these can only be described as awful. It is obviously missing a stop to prevent it from turning too far and usually when it turns too far you have to get off and pull the wheel back. Where the steering comes from the column out to the pivot point is probably worn out and along with the tie rod ends. A mate and I rebuilt his earlier this year, rebuilt the whole lot and now it works as good as new. Also remember both rear wheels are in constant drive so this also makes the steering harder, the rear wheels just want to push it straight ahead
