Rep Power: 0

ATV? where are all the filters/fittings? What oil should be used? Also, it starts kind of hard - not as easy as most 4 stroke ATV's. What could be the problem? It's a 2004

 
Rep Power: 0

Go under the four wheeler and on the bottom of the engine towards the rear of it is a lonely bolt. I can't remember the size its either a 17,19, or 21 mm socket. When you pull this oil will go everywhere so be sure that you have an oil pan underneath to catch it. After all of that drains you need to screw off the filter which should be on the left side of the engine. You need to get your filter from your Yamaha dealer. Once your done you need to take your new filter and put some oil on the o-ring to be sure to seal it and then screw it onto the engine. Then you need to screw your drain bolt back on and tighten it. After this you need to put some oil in. Near your dip stick should be a number like 2300 cm3 this probably isn't the number on the engine, I just came up with a number because I can't remember the number. Anyways 2300 = 2.3 liters of oil to put back in your motor. Since you put a new filter on you want to put .2 liters extra in there so... If the engine says 2300 put 2.5 liters of oil. After you put oil in you need to start your atv for a few minutes and then shut it off. Wait about 5 minutes and then check your oil and add any if needed. I'm sorry about not knowing the exact numbers. As for the oils that you need to use you need to stick to a motorcycle/atv specific oil, which you can get from your Yamaha dealer. If you use car oil then then something in the oil will cause the clutches to slip. If you don't have a particular brand that you want to use then just stick with Yamaha's Yamalube 20w-40.As for the starting problem I don't have a clue, my dad's starts up just fine and it's a 2003.