I recently purchased a 89 cbr600f. I was was told that needed a fuel pump and I replaced it . It was cranking fine but not starting. I found sparkplugs loose. Tightened them, then it wouldn't crank. I popped the clutch to turn the crank, then tried to crank again and it did foraa turn or two. I heard a metallic clank and it locked up. Something came loose and is stopping the crank from turning any ideas?

 

Pull the plugs does it crank over fast and easy? Check and see if there is fuel in engine oil. Make sure it is out of gear by lifting rear wheel off the ground and spin by hand to confirm it is in neutral regardless what light says. Report back your results.

 

Does it turn over by hand