2006-2014 Honda FourTrax ATV TRX250 EX TRX250X Service Manual, Page 100Get this manual
FUEL SYSTEM
PILOT SCREW ADJUSTMENT
IDLE DROP PROCEDURE
NOTE: The pilot screw is factory pre-set and no adjustment is necessary unless the pilot screw is replaced Use tachometer with graduations of 50 rpm (min-) or smaller that will accurately indicate 50 rpm (min-change If equippedremove the tamper-proof plug to gain access to the pilot screwSee the Common Service Manual, Fuel Systems PrinciplesCarburetor section for instructions1Turn the pilot screw clockwise until it seats lightly, then back it out to the specification givenThis is an initial setting prior to the final pilot screw adjustmentTOOL: Pilot screw wrench, type
Damage to the pilot screw seat will occur if the pilot screw is tightened against the seat
07KMA-MN90101 or 07KMA-MN9A 100
INITIAL OPENING: 1-12 turns out
2Warm up the engine to operating temperatureStop and go riding for 10 minutes is sufficient3Stop the engine and connect tachometer according to the tachometer manufacturer's instructions4Start the engine and adjust the idle speed with the throttle stop screw