You dont compress the spring, you wind it in by hand a little at a time. Start by hooking the end on the inside of pullstart case, and hold it with one hand. Next start to wind the spring into position with your other hand, making sure to hold it at the start, and in the middle of each wind. You have to switch hands after each half wind. Its much easier to show you in person that try to tell you. Just start by hooking it, and you can kind of see where it is going after that. Its not hard at all once you get the hang of it. Good luck!
THE 80's RAGE! Currently owns:
81, 85 Yamaha Tri Moto 125
83 Yamaha Tri Moto 200 x2
82,83 Yamaha Tri Moto 175 project
85 Yamaha Tri Z 250
84 Kawasaki Tecate 250
84 Honda ATC 70
85 Honda ATC 350X
84 Honda ATC 250R
(2) 84 Honda ATC 200x
82, 83 Honda ATC 185s
81 ATC 200
Lots of other parts and bikes