Bell OH-58 Cyclic Issues
Radam559: First, it is strongly suggested that ANY helicopter-related questions be posted on the 'Rotorheads' forum - you'll get a much better response.
Has this problem always existed or is it recent? If it occurred recently what maintenance was carried out on the helicopter immediately prior? Did the helicopter suffer some kind of flying incident/accident just prior?
Check to ensure the cyclic stick is properly inserted and secured in the fitting at the base (under your seat). If this is correct then carry out a FULL cyclic rigging procedure and start by inserting the rigging pin up through the lower fuselage into the hole in the cyclic pivot (the uniball), remember that it's easy to miss the hole (no jokes please, I've heard them all!) so release the cyclic friction and try to move the stick - if it can't move then then pin is inserted correctly.
Work your way up to the two vertical control tubes connecting to the swashplate fixed ring - notice the slight difference in the required lengths.
If the helicopter hovers with the cyclic stick to one side then use the adjustable rod ends of these control tubes to make corrections.
Let us know the outcome.