One of our wonderful operators ran the lift into our sorter hitting the mast switch it bent the bracket so I fixed that and code X4 went away. Then I noticed that the weight comes into play as far as limiting the speed because I grabbed a pallet that was 1700 and it showed 450 I drove it and no luck it was slow speed.. Then I tilted it just right and it showed 1650 I took off again and I got full speed...No recent messages only the X4 but that went away...it doesn't make sense to me either that the weight limits the speed..