My son has a yamaha raptor yfm50rt. It is idling fine, but when I put it in gear and give it gas it seems to loose power and die. I changed the oil, new spark plug and took off something to do with the fuel before it goes to the motor. i cleanded the air filter and thought about the carbuator but wasnt for sure I have the manual and read it,, but it says it may be a clogged fuel cog...but it doesnt say where that is. And I was putting grease in the fittings where the front pivots and the fitting fell off. Does anyone have a good idea on how to put that back on. I have a little common sense about motors but limited...pretty good for the mom... thanks for any help..