Just replaced the Cam Chain Tensioner Lifter with the mechanical version and all went well. Cranked up, ran for about 30 minutes sitting in garage revved up fine sounded perfect. Due to weather and coming down with the flue, my Bird sat for about a week. Went to check out last night so I could ride to work today and this is what happened. Turned switch on, turned choke on, turned ignition on. Headlight came on, all dash lights came on. Hit the start switch, heard a click & everything died but the clock. Checked battery voltage & ground all ok. Checked ignition switch & starter switch both ok. Checked all fuses including the big one on the start solenoid, ok. Was putting ignition wiring harness back together & all lights came back on. Tried start switch again and the same thing happened, all dead but clock. Click sound before all lights out was coming from battery compartment area where the fuse box, relays and start solenoid are all located. Waited a few minutes and all lights came back on without touching anything. Tried start switch and focused attention on the battery compartment area. Started touching components, relays, fuse box, starter solenoid as I hit the start switch to try and pin point clicking sound. It was the fuse box. I double checked all fuses with a meter, even though I now fuses only make a sound maybe when they blow. Checked the manual and found out there is a diode in the fuse box. I have no idea what a diode does. I pulled the diode from the fuse box, all light were off, when I went to reinstall the diode, as soon as I touch the 3 prongs to the there contact points, all lights came back on, I did not insert the diode, it was still in my hand & the lights all stayed on. I then went ahead and inserted the diode completely, the lights stayed on, tried the start switch, the diode clicked and everything went out. My question is: does a diode work like a capacitor? Do they go bad? Am I totally off the mark? Any help would be greatly appreciated.