1993-2000 Honda TRX300EX Service Manual, Page 65Get this manual
Fuel System 2Warm up the engine to operating temperature3Stop the engine and attach the tachometer according to the manufacturer's instruction4 Start the engine and adjust the idle speed with the throttle stop screwIdle Speed:
1,400 100rpm
5Turn the pilot screw in or out to obtain the highest engine speed6Readjust the idle speed with the throttle stop screw7Turn the pilot screw in gradually until he engine speed drops 100 rpmBReadjust the idle speed with the throttle stop screw
(2) PILOT SCREW
(1) THROTILE STOP SCREW
Soecifications
Adjustment IU.S.A.Onlyl
(3) MAIN JET Below 5,000 feet 11 ,500 m) Between 3,000 feet (1 ,000 m)8,000 feet 2,500 m)
(1DRAIN PLUG