2021 Yamaha YZ450F MONSTER Service and Repair Manual

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Yamaha did not write separate literature for the Monster livery. The 2021 YZ450F Monster, coded YZ450FMME, is serviced from LIT-11626-34-12, the same volume that covers the standard 2021 YZ450F.

Engine chapters begin with valve clearance measurement and shim selection, then cover cam timing, cylinder head and piston service with wear limits, clutch replacement, and crankcase splitting for crank and transmission work. Injection and ignition sections give the specified sensor values and the order in which to test them.

Suspension coverage includes fork and rear shock teardown with oil quantities, and the book carries brake, wheel and bearing procedures along with the frame and engine-mount torque tables. A wiring diagram and fault charts finish it.

Before you order, confirm YZ450FMME on the frame label rather than judging by the graphics, which are easily swapped on a used bike.

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