1986-1989 Honda TRX250 FourTrax 250R Service Manual, Page 44Get this manual
FUEL SYSTEM Remove the throttle valve spring from the carburetor top
CAUTION
The carburetor top is an integrafpart of the throttle cable assemblyThe top cannot be separated from the assembly without causing damage to the cable
(1) SPRING
Push the cable holder in and turn it 90 degreesThen remove the cable holder and jet needle, set colla and set spring
(1) CABLE HOLDER
(4) SET SPRING (3) SET COLLAR '(2) JET NEEDLE