martin beta

My son and I inadvertently loosened the clutch lever master cylinder and lost oil - How do we most easily replace this oil and what oil is recommended for the 2004 80 TXT? Also the issue has arisen as we were attempting to adjust the positioning of the lever as the clutch cable hits the bend in the handlebar if we adjust it inwards towards the centre of the bars. Hence we adjusted the wrong part to attempt to re-align the cable/oil run to the lever. So also wondering whether it is possible to adjust this line, so that it routes past the handlebar bend? Hope that makes sense and somebody can help advise best solutions? Many thanks Martin