2002 Yamaha RAPTOR 80 Service and Repair Manual
Seven model years of the RAPTOR 80, 2002 through 2008, are covered by a single Yamaha volume numbered LIT-11616-YF-81. The 2002 machine is model code YFM80WPL.
On a youth quad the adjustments matter as much as the repairs, and the book states them as figures: throttle free play, brake free play and friction material limits, chain slack, carburettor settings and spark plug specification, along with the periodic maintenance intervals.
When something needs opening up, the engine and chassis chapters give the dealer sequence with exploded views, the inspection measurements with wear limits, and the torque values for reassembly. The electrical chapter includes the whole wiring diagram.
Because so many years share the text, check YFM80WPL against the frame label and read the column that matches it.