The Enduro Engineering Billet Radiator Guards (12-5023) are full-coverage, CNC-machined aluminum armor systems engineered for the modern generation of Yamaha four-stroke off-road, cross-country, and motocross motorcycles. On technical singletrack, rock gardens, and wooded trails, the radiators on Yamaha WR-F and YZ-FX models sit directly in the line of roost, spearing branches, and heavy side-impact crush forces during trail tip-overs. The thin aluminum cooling fins and fluid tanks deform easily when dropped against rocks or trees, pinching internal fluid passages and causing trailside coolant loss.
Machined from 6061-T6 billet aluminum in the USA, the 12-5023 system combines heavy-duty front puncture protection with rigid side-impact support brackets that anchor directly to the chassis frame tabs. This structural design encases the radiator core, transferring lateral impact loads around the delicate cooling matrix directly into the motorcycle’s main frame spars. Precision-machined flow slots maximize direct cooling airflow to maintain stable operating temperatures during slow-speed, high-clutch technical woods riding, and the assembly is fully dimensioned to clear OEM and aftermarket radiator cooling fans.
Full Billet Aluminum Architecture: Combines CNC-machined 6061-T6 front face plates with structural inner and outer frame-mount brackets for comprehensive front and side protection.
Trail Hazard Puncture Shielding: Deflects trail branches, sticks, and heavy roost that easily puncture factory plastic louvers and rupture aluminum radiator cooling tubes.
Side-Impact Crush Resistance: Anchors to the chassis to prevent radiators from collapsing inward or twisting against the cylinder head during hard drops.
High-Flow Woods Venting: Engineered slot geometry maintains laminar airflow across cooling fins to prevent engine boiling in low-speed, technical terrain.
Cooling Fan Kit Compatible: Engineered with rear clearance to integrate cleanly with OEM Yamaha auxiliary cooling fans and aftermarket Trail Tech digital fan kits.
Direct Bolt-On Fitment: Mounts directly using factory frame points and retains stock radiator shroud ergonomics without cutting body plastic.
Made in the USA: Manufactured, tested, and assembled at Enduro Engineering in Lansing, Michigan.
1x Left Billet Aluminum Front Radiator Guard Plate (12-5023-01L)
1x Right Billet Aluminum Front Radiator Guard Plate (12-5023-01R)
2x Structural Billet Frame Mounting Brackets (Inner & Outer Supports)
1x Complete Metric Fastener Pack (Socket-Head Screws, Button-Head Screws & Lower Clip Nuts)
1x Installation Instructions Sheet
Brace Compatibility Note: Standalone protection system. Replaces the OEM plastic louvers and isnot compatible with secondary aftermarket rear radiator braces.
Oversized Tank Compatibility: Clears OEM Yamaha fuel tanks and IMS / Acerbis oversized off-road fuel tanks configured for factory shroud positions.
Left-Side Wire Harness Routing (Critical): During assembly of the left-side radiator guard mount, locate the factory main wiring harness that drops down along the left frame spar. Per Enduro Engineering installation specifications, ensure this wiring harness is positioned cleanlybetween the radiator and the guard mount, behind the top mounting bolt. If pinched between the rigid billet bracket and the aluminum frame tube, chassis vibration will wear through the wire casing and cause electrical shorts.
Radiator Inspection & Straightening: Billet guards are CNC-machined to rigid factory tolerances. If your WR-F or YZ-FX has already experienced trail tip-overs, inspect the radiators before installation. Radiators that are bowed backward or twisted will place lateral tension on the billet brackets, resulting in cross-threaded shroud inserts or misaligned bolt holes. If bent, remove the radiator and gently square it on a flat workbench prior to bolting on the 12-5023 brackets.
Hardware Assembly Sequence: Do not torque individual fasteners during step-by-step assembly. Mount the inner frame brackets, install the lower outer clip nuts, and align the front billet face plates. Hand-thread all socket-head screws and shroud mounting bolts 3 to 4 turns first. Once the entire assembly is loosely aligned on the motorcycle, tighten all fasteners evenly to draw the guards flush against the radiator contours without binding the mounting tabs. Apply a light drop of medium (blue) threadlocker to the fastener threads.
Woods Mud & Silt Management: In slow, muddy cross-country racing, wet loam and clay can pack into radiator guard slots, insulating the core and triggering fan cycling or boiling. Spray a wet coat of Maxima SC1 silicone protectant across the billet face plates prior to riding. The hydrophobic silicone film prevents mud from bonding to the machined aluminum edges, allowing trail roost to vibrate off and keeping airflow channels clear.
Part Number: 12-5023
If you have any questions or need help finding what you need for your motorcycle or your next adventure please reach out:
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