The only thing that's suppose to go "snap, crackle, pop" is Rice Crispies when you pour milk on it. Everything else- it's a problem. I wouldn't even turn the engine over on the starter until the cam timing and all things involved with the tensioner have been checked out. The nylon toothed tensioner sprocket may have split and a piece broke off. The rubber tensioner wheel may have lost a chunk. I doubt that a nylon guides have broke but never say never. After checking all of those things visually only then would I attempt to turn over the engine, first by wrench and if there's no mechanical blockage, attempt to do a compression check to see if a valve got bent.
Never ceases to amaze me, of all the possible problems associated with the KZ1300, the cam chain tensioner is #1 followed by Carb low speed circuit blockage as #2 followed by overheating stators because of shunt regulators as #3. If you own one of these bikes, you need to do the modifications to the tensioner and voltage regulator and pay some sort of attention to you fuel and manage that as you see fit. Then enjoy the ride.
