I have a 1993 trx 300 4x4. Its a great machine but ever since I replaced the piston I have been having problems kind of. When I am go fast up a hill in 5th gear and start to loose power I hear a slapping. I am guessing its the chain or something?

My other problem is I think my front differential. I noticed when I am ridding and let of the gas just gliding it will make a rattling noise from the front end. It will even do this when I am simply pushing my atv out of the garage or something. It almost sounds like maybe there is a screw in there or maybe the gears are stripped.