Was given a FS 40 that has not been used in over 15 years and is gummed up. I was able to free up the throttle barrel and the crank. However, when I turn the crank the valves do not open and close. I pulled the backplate and the crank is moving the piston up and down, but I cannot see the front cam gear.
The small access cover on the right side at the cam gear, I can take the screws off, but I cannot get the cover off. It will turn around but not come off. How do you get it off and how do I get the lifters out? I took the nuts off of the rocker arms, but the allen screws will not come out.
Is there anywhere that I can find disassembly instructions?

Thanks for any help.

JJ