I had an '82 model that I rode the crap out of. Only other suggestion I can make is adjust the valves. If the aren't seating well you lose some suction off the pump.
you know... I've seen a lot of blonde coyote while hunting in south carolina.
This past friday I was hunting and saw 2 red foxes, 1 blonde coyote - then the coyote coming back with one of the foxes. The coyote didn't get to eat him though. He spooked the buck I was getting ready to shoot, so I turned to him and knocked him down. I shot him with my 7x57 at about 15 yards - there was no head left to him after the blast