1985-1986 Honda ATC250R Shop Manual, Page 48Get this manual
FUEL SYSTEM VALVE
Check the valve and seat for wear or damageReplace the valve and seat as set if either part is worn or damaged
VALVE SEAT
SLOW JET
Remove the main jet, main jet holder, needle jet, baffle and slow jetCheck the each parts for wear or damage
MAIN JET
MAIN JET HOLDER