2001 Yamaha YFM660 Raptor Factory Service Manual, Page 276Get this manual
CARBURETORS
Job namePart name Pilot jet Pilot screw set
Q'ty Remarks Refer to "DISASSEMBLING ASSEMBLING THE CARBURETOR"OTE: Before disassembling the carburetor, make sure to note the number of times the pilot screw is turned out from the seated position to its set position