Les S,
Your 125 should have a lever on the right side of the steering tower that engages/disengages the front PTO. Pull sideways past the catch and move it forward to engage. Pull it back and place back on the catch to disengage.
Your 125 should have a lever on the right side of the steering tower that engages/disengages the front PTO. Pull sideways past the catch and move it forward to engage. Pull it back and place back on the catch to disengage.