I have my 2001 yz 125 and it wont start, it started doing this recently, but when it first did it i just cleaned my spark plug and it worked, went out for a ride for a couple of hours and it bogged out on me before getting home, i tried to start it and it wouldnt start, i cleaned out the spark plug, i checked if it had spark, and it did, when i kicked it, it turned on but bogged out right after, i dont know what might be wrong, any help would be greatly appreciated. Thanks in advance.