i have a 1999 mxz600. and i have this little problem when i am riding it will quit running. it alway starts on the first pull afterwards. sometimes it will start to die then catch and take off. i put a new computer in it when i first got i two years ago. sometimes it dies when i first start it up and other times after about an hour of riding. just wondering if it would be the coil, stator, voltage regulator, or computer again. what should i be looking for.