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Join Date: Nov 2007
Location: Chandler, Arizona
First things first. Before pulling the engine, I would do a compression test. It will probably be very low, but at least then you will know you actually need to pull the engine. Not likely an ACCT thing, that would not cause a loss of power on the front cylinder unless the chain broke or jumped teeth. And the cam chain tends to make a rattling sound. A rapping or knocking sound is more likely to be a con rod bearing or piston slap. If you have completely lost power on the front cylinder, you have lost the ring seal, or a valve is stuck open, or worse, you have a broken rod.
Since it is the front cylinder, I would start the teardown with the front cylinder. It may or may not be necessary to split the cases, but if you have any doubts about whether it has lower end problems or not, then you will literally have to completely disassemble the engine. If you go that far, I would not buy any parts until you find out the condition of everything. There could be more wrong than the engine is worth, considering what Kawasaki charges for parts.
I am a motorcyclist, NOT a biker.
1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
2001 Yamaha XT225, heavily modified
2004 Honda Rebel 250
1979 Vespa P200E
2002 Vulcan 750 parts bike
1994 Yamaha XT225 parts bike