Periodic maintenance and adjustment7-307EAU86370Troubleshooting chartCheck the fuel level inthe fuel tank.1. Fuel There isenough fuel.There isno fuel. Supply fuel.Check the ignition.The engine does not start.Check the ignition.Try starting the engine.3. Compression There is compression.There isno compression.The engine does not start.Have a Yamaha dealer check the vehicle.Have a Yamaha dealercheck the vehicle.Remove the spark plugand check the electrodes.2. Ignition WetDryWipe off with a dry cloth and correct thespark plug gap, or replace the spark plug(s).Have a Yamaha dealer check the vehicle. The engine does not start.Check the compression.Open the throttle halfway and trystarting the engine.

Yamaha YZ85 2021 Owner's Manual