1987 Honda Fourtrax TRX 250X Service Manual, Page 28Get this manual
MAINTENANCE
CARBURETOR IDLE SPEED
Inspect and adjust the idle speed after all other maintenance items have been performed and are within specificationsThe engine must be warm for accurate idle speed inspection and adjustmentStop and go riding for ten minutes is sufficient
","iiTHiiiiTTLE STOP SCREW
After warming up the engine, shift the transmission into neutfal and connect tachometerTurn the throttle stop screw as required to obtain the specified idle speed
IDLE SPEED: 1,400 :t 100 rpm
CYLINDER COMPRESSION
Warm up the engineStop the engine and remove the spark plug Disconnect the decompressor cable at the cam follower shah