rod bearing?

[YZ125rider21]

hey i am wondering what this noise could possibly be...ok just got a new crx everytime i start it i shoot out a pile of dark waterish oil...here i am going down the road a few night ago my car starts hesitating to go i would have to down shift to cetch back up if not rpms just drop rapidly like timing is bad....but heres the cetch as it was doing that there was a loud pinging noise....look under hood see anything loose or anything and there wasnt...so i came to a conclusion that it only made the loud clinging noise when i would step on the gas...anybody know what this could possibly...i deciding the pining noise can be my head took it off i cant see nothing worng with it....so here i am unbolting everything tonight got it ready come on out tomorrow with a cherry picker thinking it might be a rod bearing.....my guess only....wonder if any you had this problem before if so let me know what you think it might be thanks

[Cjz89civic]

Could also be rings bad scoring the side of the cycl. Sounds like a fun rebuild though. Also if you pull it to replace bearing spend the extra and rebuild the whole thing you will thank yourself later.

[YZ125rider21]

ahhh i dont wanna rebuild it i have a b20 here waiting for me get the rest money finish it up...i only want this motor working fine that way when i put b20 in i can put back old motor in for smog purposes only....so i jsut trying to fix what is needed to be fix now.....