Those arms are your starter clutch. they're supposed to swing out against the clutch Bell and turn over the engine to start it. I'm going to guess as long as you have springs on the starter clutch arms, they wouldn't be the issue. Did you take a look at the link? Make sure you have all of the parts and reassemble it as instructed. Test it and it should spin pretty freely until about 3-4 mph and the starter clutch will engage turning over the engine.