hey guys, ok so my buddy has a rm 125 and we went out for a ride the first time he got it and he forgot to check the oil, after we got a couple miles it started making a pinging sound, so he turned it off and and started it and the pinging noise was still there, any ideas? he doesnt have enough money to get any new bike and i want to go back out and hes one of my only riding buddys that can stay with me, so any help would be great, Thanks guys:-D