Thanks for all the replies much appreciated, i had tried adjusting by trial and error but was not happy and Dr Diesel has given me the answer i was looking for thanks for that .
Geuss what i am doing tomorrow morning!

Lynall

The Bowden cable is made from strands of steel, which Stretch over time.

To maintain and insure the accuracy of the factory adjusting method with the pointer and knurl nut style Bowden cable, you need to use a new cable.