Re: 1999 Yami 225 trim seal?
It's easy to make a spanner - just get some 1" x 1/8" flat steel stock and machine screws. Select screw diameter to fit holes in top of cylinder. Cut/grind with Dremel tool a semicircular notch on edge of 2 pieces near one end to clear piston rod, depth = 1/2 rod dia.; connect the 2 pieces near one end with a 2" long piece of stock & screws. Drill screw holes next to notch on centerline of notch for screws/pins to fit in cap, distance from edge as appropriate for diameter on holes in cylinder cap. Suggest tapping these holes and maybe using a locking nut on top side snugged up against stock to strengthen and lock screw at desired depth; adjust depth to match hole depth in cap. This should do the job, although you'll probably have to remove cyl from motor for access.
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