Look's like there are alot of members that come on here lately with a problem about thier atv's not starting ??..turns key on..pushes start button..and they only hear a clicking noise comming from somewhere ??? ( i said somewhere..because they have no idea what or where it is ! )..lol. anyway..your answer !!..this is a sign of a couple reasons as to what is going on..first..your battery could be weak ?..or dead ?..depends on how long you let it sit ????. soo..first thing's first..check your battery..make sure it's fully charged ???..now..push the start button....same thing..clicking noise that's driving you crazy..and not starting ??..ok..now..locate your starter's solenoid..it's round..and most of them are near your battery..it has two large cables on it..there is a 10mm nut that attaches the cable to the terminals...make sure the post is clean..and tight ?..now..follow the cable to your battery..do the same here..clean..and tight !. back at the solenoid's other termianl post..is the other large cable..check to see if it's clean and tight ?..if so..follow it to your starter....it's attached with a 10mm nut...about middle ways of your starter. check to see if it's clean and tight ?. now..go back to your battery....find the neg post on the battery....see if it's clean and tight ?..follow this cable to your starter or a motor bolt ?..most of these cables bolt up near the starter...either with the starter bolt that attaches the starter to the motor ?...or near the starter..is a 6mm bolt going through the cable..into the motor. see if it's clean and tight ?..okkk..now..go back to the solenoid..you know...that pesky round thing that makes that clicking sound when you push the starter button !!..with key on ( check to make sure all your fuses are not blown ! )..push the start button..does the atv crank up ?..or do you hear that damn pesky noise again ?..if you hear that clicking noise...take an old screw driver..and touch the screw driver to both tops of the solenoid terminals..did the bike crank over ??..or did it do nothing ?..if it cranked over...then replace the solenoid..it's bad !..if it did not crank over when you put the screw driver on the solenoid's terminals..then take a hammer..and slightly tap the starter as your pushing the start button....if the starter turns over after this..then your brushes are worn to much..and you can either replace the brushes in it ?..or..buy another starter ?. if you have found that it's your starter that is bad...remove the starter from the atv ( make sure you unhook the battery from the atv )..just one cable..neg or pos...does not matter. if you have a service manual ( which..you really should have one ! )..it will show you how to pre-test the starter. before you start removing the bolts/screws from the starter ( pay attention to this next part..VERY IMPORTANT ! )..scribe a couple lines across the ends of the starter..where the ends meet the middle...this is so...when you go to put it back together..you can line the ends up where they are suppose to go !..pull the starter apart, test the armaiture..it shows you in the book how to test it..and ohm it out. clean the ends out of all the grim and dirt..and crap..i'm sure it's full of it !!..an air compresser works wonders..if ya don't have one..well..wing it !!..lol. grease the ends of the armature..bearings if it has them ?..most do. put your new brushes in..put it back together. do not tighten the bolts or screws down to tight !!!..try spining the starter by hand..does it spin kinda easy ?..if not..you got something wrong ?..or..your new brushes have not '' seated '' in yet. now..take a set of jumper cables..hook them up to a good battery..car/truck..or even a battery by itself..just make sure you got the cables on the right post on the battery's end !..now...at the other end..hook the neg on the body of the starter..the best place is the ends of the starter..where the two bolt holes are. now..briefly..touch the pos cable end of the jumber cables to the starter's bolt post..becareful..if the starter is rebuilt right..it will kinda jerk as it turns really fast !..if you did it right..then congrats..you just over hauled your starter..and saved a few bucks !..if you failed..well..it's time to go shoping for a new starter !..lol. hope this helps out gang !.