Below the battery panel is a frame panel, remove this and you'll be presented with the reg/rec... A good idea is to see if its earthed to the frame as this can cause problems ifs its broken or loose.
Kick stand switch may be the problem, if the kick stand is down and clutch out it wont start, sometime this switch will play up and it can be bypassed.
check the spark plugs are ok and the plug caps resistance are in tolerance as they are resister caps and if they are failing they reduce thd spark power ! i had this on a kawasaki 900 once ! also how old is the fuel as after 5mths its no good as it goes off ! carbs could be dirty also another area to look at ! clean connections on coil wires ?