XS400 electric problem

So i went to take my motorcycle test yesterday after riding my bike all day long and went to kick it over and it would not start so i pulled the battery out last night had it charge all night long and nothing im getting no power to the bike at all unless battery charger is pluged in and im getting a buzzing noise out of my left pipe. Sounds like it is coming from the coil. do you guys have any idea what the fuck is going on?

What do you mean no power out of the bike?

Do you have a multimeter? It's going to be impossible to test anything electrical without one.

Originally Posted by Pendulum

What do you mean no power out of the bike?

Do you have a multimeter? It's going to be impossible to test anything electrical without one.

His bike is being really weird... When hooking the bike up to the trickle charger the bike will run but as soon as you take it off it dies. Also there is a strange buzzing noise coming from the left of the engine while its just sitting... you can hear it really well out of the left exhaust pipe. Like mentioned before we charged the battery all night and still nothing...

What about if you unplug the stator from the R/R? Will it run then?
What's the voltage at the battery? How 'bout the voltage with everything unplugged from the battery (all power AND ground leads removed)?
Voltage at each fuse in the fuse block?
Are all your fuses good? Don't check them visually... Pull them out and check the ohms.
Check all grounds, as well.

Some of that stuff might be irrelevant, without knowing voltage and ohms of certain components, you might as well just check everything. Sounds like a bad stator, which cooked the battery. But, without more info it's impossible to say. Like I said, without a multimeter the best you can do is replace things until it works. Which is expensive and time consuming. And if you replace things in the wrong order, you're just gonna burn stuff up again which leads to a wild goose chase.

checked for frayed wires with the buzzing sound. could be something arcing.

check your coil. a common symptom of a bad coil is when its cold it will work, but when it heats up (after running) the wires expand and it shows its true colors (fucked up)

load test your battery

like pendulum said, dont start blindly replacing stuff, cause you will be chasing your tail. start at the battery and work your way out. 30+ year old wiring and components works at first, but after a few runs and heating up, and vibrating around they quickly fail.