If it does have a battery (some scooters don't) it will probably be under the seat.
its under the seat
The battery is located in the trunk.
optima red top very good battery for starting but pricey
In the back, in the boot/trunk
Facing the engine from the front of the vehicle, the battery is located in the right, front corner.
Battery temp sensor location back of battery towards fire wall
I'm working on mine now and on mine anyway it's on the right side underneath the hole for the battery wires.
It is under the hood, next to the battery.
should be your starter selonoid...they are a common problem on raptors.
Follow the positive battery cable from the battery. It will lead you directly to the starter. Driver side of the engine, below the exhaust manifold.
2003 YAMAHA WR450F
Located behind the battery on top of the passenger side fender well.