Carburetor (XR600R)

Identification mark
1985 through 1987 PH52A
1988 PD8AA
1989 and 1990 PD8AD
1991 and later (except 1998 and later California) PD8AF
1998 and later California PDM18
Jet sizes and settings
Standard main jet (sea level to 5000 ft)
1983 through 1987 (primary and secondary) 122
1988 through 1990 165
1991 and later (except 1998 and later California) 152
1998 and later California 128
Slow jet
1983 through 1987 45
1988 60
1989 and later (except 1998 and later California) , 62
1998 and later California 58
Jet needle clip position
1983 through 1987
Primary 4th groove from top
Secondary 2nd groove from top
1988 and later 3rd groove from top
Mixture screw setting (turns out from lightly seated position) – see Section 4
Standard
1983 through 1987 1-3/8
1988 2-5/8
1989 through 1997 2
1998 and later (except California)
Initial setting 2
Final setting : 3/4
1998 and later California
Initial setting 1-1/8
Final setting 1/2 in from standard final setting (see Section 4)
High altitude 1/2-turn in from standard final setting (see Section 4)
Float level
1983 through 1987 18.0 mm (0.71 inch)
1988 and later 14.5 mm (0.57 inch)