i just recently had the same problem, check your plugs. when you leave your bike sit for a while, while its running, it can fowl the plugs. i thought it was my battery because i started my bike up and showed my friends multible times because i just got it and i just let it run. Then out of nowhere it shut off. i thought it was the gas cuz it was low, so i put gas in it and it didnt start then i replaced the battery thinking it was that because it died and wouldnt hold a charge. So i took it to the mechanic and it was my plugs. Good luck gettin to the plugs its fun

 

fouled means the plugs are covered in gas meaning they wont spark anymore

 

if its making a clicking noise when you go to start it the battery is dead. you gottta charge it up all the way. sometimes when its not fully charged it will crank but wont give enough juice to actually start it. just had that problem on my friends gixxer.

 

I agree with smitty, it sounds like you need to either charge the battery, or get a new one. Plus, i had a similar problem with mine a couple years ago, but it was still turning over. The guy that owned it before me started it in the winter to let it run and he fouled the plugs that way. Pulled the plugs, and sure as ****, they were black. So if putting a charge on the thing doesn't work, pull your plugs out and test to see if they work... you can do this by connecting the plug back to the spark plug wire and grounding it on your engine then crank it over and see if your getting a good spark or if its jumping like a jackass all over the place (or not at all). Good luck.

 

Actually black plugs isnt a bad thing. As long as there not completely covered. Fouling a plug means trying to start it when it has fuel and NO spark Which means it keeps dumping fuel into the cylinders and everytime the pistons come up it covers the plugs with fuel so now since there soaked in fuel they cant spark. If a plug is black just a bit its normal its just carbon deposits from running rich/stoich. if there white its running lean. And if you smell em and they smell like fuel or there all shiny and coated then there fouled.

 

Right... i was just saying my plugs were bad and i needed to changed them. Didnt mean to make it sound like that.

 

I took out 2 of the spark plugs last night (didn't have time for the other 2) and the looked completely black (charred is more like it). They didnt smell of fuel and were not shiny either. I will get to the other 2 on monday. Gotta hit chicago this weekend for st patty's.

 

My bike finally started. It was the battery all along. I replaced the spark plugs though in the process.