What is the N letter represent in 1992 Honda CB 750 F2N

630 o-ring chain would be best, or 630 heavy duty

I have no answer, but I have a 1994 cb 750 with a noisey cam chain, I need a chain and a link, I know they are avaialble, this will allow for repair engine in sit, I had a guy offer one for good money with link but lost his frikking details, any one know where I can get a chain and link for the 750 1995 cb bike fires first on the button be a shame to scrap it, break it, any one ionterwested in the bike i want 900 have aero qups hagen shox, new pilot tyres, also need one fork seal doing, and I know this is a easy job, I do all my suzuki ones myself.

There are 3 covers on your bike. Please rate this answer as "very helpful".

From your explanation it sure sounds electricals, but surprising to hve a total failure to the electricals and thn it reappears after 30seconds!
Best would be to go through the wiring especially frm the battery onwards, the fuse box .
Since it is totally disappearing it should be a fault to those main wires could be lose connections somewhere!.
Hope this helps.