2019 Honda TRX250TM ED Owner's Manual
The tools in the kit are sufficient to perform routine maintenance and simple repairs. Petrol pumps at service stations normally display the pump octane number. Make sure the oil is between the upper and lower level marks on the oil fill cap/dipstick.
Change the oil with the gear case at normal operating temperature to assure complete and rapid draining. Service the air cleaner more frequently if you ride in unusually wet or dusty areas. Apply a thin coat of grease to the sealing surface of the air cleaner assembly.
Check that the throttle assembly is positioned properly and the securing bolts are tight. Check for smooth operation of the throttle lever from fully open to fully closed in all steering positions. Inspect the condition of the throttle cable from the throttle lever down to the carburetor.