81 CB750F project

Posted by 81cb750 on Sep 15, 2008; 7:16pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/81-CB750F-project-tp458332.html

I just picked up an 81 CB750F as a project for my son and I to work on. When we picked it up, it turned over but didn't run. I pulled the carbs off and cleaned them up. Had to replace all the screws holding it together (what a mess). Anyway, it has 46k on the odometer and once I got it to fire, the engine was pretty noisey. I was happy about the fact that it actually ran pretty smooth.

This is my first CB750 so my question is, are these motors normally pretty loude? I am not referring to the exhaust sound, there was a lot of lifter noise and I am worried about a possible rod knock! I did not have it running very long due to loosing battery power. The bike is mostly coplete with only a few body parts missing like the side covers and rear shield for the headlight assymbly. Any thoughts as I decide wether or not to do a total rebuild on the motor?

Any input, advise or insight about this bike is very welcome! Thanks.