'78 CB750F rattling sound (With Video).

[xxthegonzxx]

So I recently purchased this CB750F and have been fixing it up here and there. Recently I found metal shavings that stuck to a magnet in my oil pan. The oil filter bolt was rusted on and I'm pretty sure the PO never changed the oil. I recently tried to ride it to work to test it out and got stuck in between two \ lanes on a major street. Not fun when cars are passing you left and right going about 40-50 MPH. One of the main factors of me being stuck was the oil pressure dropping considerably low to the point where the engine shut off. From my research and some of your help I've found out that this is more than likely due to crankshaft bearings and maybe more. I figure i'd post this video to show anyone out there what rattling sounds like in the engine and maybe some of you more experienced DTTers out there can give me more insight as to what I'm getting into. I'm planning on tearing the engine apart and seeing what the problem is but since I'm a newbie I'm afraid I'm getting way ahead of myself. Hopefully you guys can help.

Youtube Link: http://www.youtube.com/watch?v=AZ27_N7JI0g

 

[cavity.]

have you done a compression test?

 

[xxthegonzxx]

have you done a compression test?

Compression test was done and all were within spec.

 

[Clifton]

Don't know what has become of this but it sounds like primary chain slapping from out of sync carbs. If you are resourcefull you can make a test kit for cheap.