Put a new engine on my Sears puddlejumper today. I had to tap and drill the crank, it was a breeze with my drill and tap jigs (thanks ScooterBoy!:thumbsup . Anyway, as you can see, the frame has a swingarm suspended with shocks. My problem is getting the chain adjustment right. When I sit on the bike, the shocks compress fully, and the chain becomes slack. With no weight on the bike, the shocks are extended, and the chain gets tight because of the change of angle. When it's too loose, the chain falls off the rear sprocket when I ride. Too tight, I can barely push it when I'm not on it. I got it feeling pretty good, but it seems like there's still too much tension on the chain when the shocks are fully extended, and don't want to wreck the shaft that the driven cluch spins on. Sure, I realize I need to find a happy medium, but it's tricky to find it while trying to slide the engine in its slots with the the springs and swingarm fighting back. I guess I'm answering my own question: "Keep trying til you get it right!", but I'm sure I'm not the only one who's struggled with this. Any ideas? Thanks in advance!
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