Dedicated Subsystem WorkbenchPlatform Gen: 2018–2024

2019 Yamaha YZ450F Motocross Fuse Box Diagram, Amperages & Relay Diagnostics

Complete fuse box location, blade fuse slot mappings, ISO color codes, blown fuse symptoms and dark current parasitic drain testing for 2019 Yamaha YZ450F Motocross.

Gen 2018–2024

Factory Platform Compatibility: All workshop fluid capacities, maintenance milestones, torque specifications, and consumables on this specification sheet are factory-identical across model years 2018 through 2024.

Select Model Year:(Active: 2019)

2018 2019 2020 2021 2022 2023 2024

Engine

450cc

Drive

520

Cooling

Liquid-Cooled

CIRCUIT HEALTH DECKMain: 30A BladeSpec: < 1.5 mA Quiescent

FUSE BOX, RELAY ASSIGNMENTS & PARASITIC DRAIN ISOLATOR

Fuse & Relay Location: Main fuse box located under rider seat forward of battery; Main 30A/50A fuse on starter solenoid near battery positive terminal.

Select Fuse to Inspect Circuits & Failure SymptomsFormat: Mini Blade (ATM)

15A

SLOT: IGNITION

Ignition & ECU

Rating: 15 Amps

Downstream Protected Components:

ECU LogicIgnition Stick CoilsCrank Position Sensor

Mechanic Diagnostic: Symptoms If Blown

Engine cranks but will not start; no spark generated.

Shop Replacement 15A Fuses

Official NHTSA Safety Recalls & Technical Bulletins

0 Open Campaigns (Clean)

U.S. Department of Transportation compliance database (Title 49 U.S.C. Chapter 301).

Verify VIN on NHTSA.gov

No Active Federal Safety Recalls Reported

The U.S. DOT National Highway Traffic Safety Administration (NHTSA) records zero open safety recall campaigns for the 2019 Yamaha YZ450F Motocross platform. Always check your individual 17-digit VIN at an authorized dealership or via NHTSA.gov for individual recall completions.