1985-1986 Honda ATC250R Shop Manual, Page 56Get this manual
FUEL SYSTEM FLOAT Remove the float pinRemove the float and float valveFLOAT PIN
Check the valve and seat for wear or damageReplace the valve if it is worn or damaged
JET BLOCK Remove the main jet, baffle plate, slow jetCheck each part for wear or damageRemove the air screwNOTE Before removing the air screw, record the number of rotations until it rests lightly, so it can be returned to its original positions