[bp131]

Maybe some PB blaster and tap, pound or punch it out from the sprocket side. By the way, one of the best tools I found for rebuilding something unfamiliar is a camera.

 

[bp131]

I think you should get it out. It probably would be best to get everything apart to make sure that it's all OK. I went and got the 1 11/16" socket. Since I don't have a 3/4" drive. I ground to flat spots on the socket and borrowed a buddies big ol' crescent wrench (he didin't have a 3/4" drive either). Worked just fine for removal and too re install.

 

[bp131]

Side note for you. Make sure the socket you get is deep enough to go over the threaded part of the main shaft high gear. This all being said knowing there is a box spanner out there made specifically made for this task.