well basically the car is a mugen mbx5 the servo is an ace 1015

what the problem is is when the car is on and i turn right the steeing is amazing like 1-2 metre turning circle max but when i turn left it is 5-6+ metre turning circle i no i can turn down turning right on my speckturm to even it up but is there anyay of adjusting either sevro saver or linkages to enable me to get both to do somwhere in the middle say 3-4 metre turning circle. its just the servo doenst seem to pull back enough.
when the car the radio is turned of i use my hand to turn the wheels the servo moves far back and i can tell there is nothing blocking any part form moving that far.

all help appreciated
thansk adam