2021 05-22 YAMAHA YZ125 FILL CAP RADIATOR RIGHT & LEFT SIDE PAIR 1C3-12461-00-00
€350.00
Right & left radiator fill cap pair
OEM replacement for Yamaha YZ125 (2005–2022)
Maintains correct cooling system pressure
Durable heat- and vibration-resistant construction
Exact fitment for factory radiator necks
Black finish for corrosion resistance
Clamp-on installation, no modification required
Ensures optimal coolant flow and engine temperature
Improves cooling system reliability
Essential for routine maintenance or restoration
Designed for off-road and motocross conditions
Compatible with right and left side radiators
Maintains factory performance and safety standards
2021 05‑22 YAMAHA YZ125 FILL CAP RADIATOR RIGHT & LEFT SIDE PAIR 1C3‑12461‑00‑00 – Complete Product Overview & Buyer’s Guide
The 2021 05‑22 YAMAHA YZ125 FILL CAP RADIATOR RIGHT & LEFT SIDE PAIR 1C3‑12461‑00‑00 is an essential OEM replacement part designed specifically for the Yamaha YZ125 motocross bike manufactured between 2005 and 2022. This product ensures your cooling system remains sealed, reliable, and functioning at peak performance. In this review, we explore its features, fitment details, comparison to similar parts, and why this radiator fill cap pair matters for safe and effective engine cooling.
What Is the 2021 05‑22 YAMAHA YZ125 FILL CAP RADIATOR RIGHT & LEFT SIDE PAIR 1C3‑12461‑00‑00?
The 2021 05‑22 YAMAHA YZ125 FILL CAP RADIATOR RIGHT & LEFT SIDE PAIR 1C3‑12461‑00‑00 refers to a pair of radiator fill caps — one for the right and one for the left radiator on Yamaha’s YZ125. These caps play a crucial role in the bike’s cooling system by sealing the radiator necks and maintaining optimal pressure to prevent coolant loss, overheating, or air ingress.
Manufactured to OEM specifications, the 2021 05‑22 YAMAHA YZ125 FILL CAP RADIATOR RIGHT & LEFT SIDE PAIR 1C3‑12461‑00‑00 delivers perfect fitment and function for riders who want reliable performance and factory‑level quality for their motocross machine.
Key Features & Technical Details
OEM‑Grade Construction
The 2021 05‑22 YAMAHA YZ125 FILL CAP RADIATOR RIGHT & LEFT SIDE PAIR 1C3‑12461‑00‑00 is built from durable materials designed to withstand heat, vibration, and frequent use common in off‑road and motocross riding.
Right & Left Pair
This listing includes two fill caps: one for the right radiator and one for the left radiator. Having both sides included ensures a proper and complete cooling system repair or maintenance job.
Exact Fitment for YZ125 (2005–2022)
The 2021 05‑22 YAMAHA YZ125 FILL CAP RADIATOR RIGHT & LEFT SIDE PAIR 1C3‑12461‑00‑00 is engineered specifically for the Yamaha YZ125 models produced from 2005 through 2022, making it ideal for replacement jobs or restoration projects.
Maintains Correct Cooling System Pressure
These radiator caps help maintain the correct pressure level within the cooling system. This ensures the coolant remains at the correct temperature and prevents boil‑over or air pockets from forming.
Direct OEM Replacement
The 2021 05‑22 YAMAHA YZ125 FILL CAP RADIATOR RIGHT & LEFT SIDE PAIR 1C3‑12461‑00‑00 replaces the original caps without modification, keeping performance and reliability consistent with Yamaha factory standards.
Why It Matters – Performance & Reliability Benefits
Improved Cooling Efficiency
By sealing the radiator necks properly, the 2021 05‑22 YAMAHA YZ125 FILL CAP RADIATOR RIGHT & LEFT SIDE PAIR 1C3‑12461‑00‑00 ensures that coolant stays pressurized and temperature regulation stays constant — key to avoiding engine overheating during intense motocross sessions.
Essential Maintenance Part
Over time, original radiator caps can wear, lose seal integrity, or fail under pressure. Replacing them with the 2021 05‑22 YAMAHA YZ125 FILL CAP RADIATOR RIGHT & LEFT SIDE PAIR 1C3‑12461‑00‑00 helps maintain peak cooling system performance.
Durability for Off‑Road Conditions
Trail rides, jumps, rough terrain, and frequent heat cycling demand a fill cap that can endure heavy use. The 2021 05‑22 YAMAHA YZ125 FILL CAP RADIATOR RIGHT & LEFT SIDE PAIR 1C3‑12461‑00‑00 meets these demands thanks to factory‑grade quality.
Installation & Fitment Guide
Installing the 2021 05‑22 YAMAHA YZ125 FILL CAP RADIATOR RIGHT & LEFT SIDE PAIR 1C3‑12461‑00‑00 is simple but important. Always let the engine cool completely before removing the old caps. Clean the radiator necks and check for damage before installing the new pair. Press each cap down firmly to ensure a secure, tight fit.
Since these caps are made to OEM fitment standards, no modifications are required for Yamaha YZ125 bikes from 2005 through 2022. Professional installation is recommended if you are unfamiliar with cooling system components.
Comparing With Related Products
Aftermarket Radiator Caps
Aftermarket radiator caps may offer lower prices but can vary in quality. When compared to the 2021 05‑22 YAMAHA YZ125 FILL CAP RADIATOR RIGHT & LEFT SIDE PAIR 1C3‑12461‑00‑00, many aftermarket options lack precise OEM tolerances, which can result in poor seals, pressure loss, or premature failure under motocross conditions.
OEM Single Radiator Cap
Some sellers offer only a single radiator fill cap instead of a pair. The 2021 05‑22 YAMAHA YZ125 FILL CAP RADIATOR RIGHT & LEFT SIDE PAIR 1C3‑12461‑00‑00 provides both right and left caps, ensuring comprehensive service rather than a partial solution.
High‑Pressure Performance Caps
High‑pressure radiator caps designed for racing applications may boost pressure beyond OEM specs. However, the 2021 05‑22 YAMAHA YZ125 FILL CAP RADIATOR RIGHT & LEFT SIDE PAIR 1C3‑12461‑00‑00 maintains factory pressure levels that are optimal for reliability and cooling balance in Yamaha YZ125 engines.
Final Verdict – Recommended For YZ125 Owners
For riders and mechanics maintaining or restoring a Yamaha YZ125, the 2021 05‑22 YAMAHA YZ125 FILL CAP RADIATOR RIGHT & LEFT SIDE PAIR 1C3‑12461‑00‑00 is an accurate, reliable, and essential replacement part. Its OEM construction, perfect fitment, and durability under off‑road stress make it a smart choice for ensuring your cooling system remains effective and trouble‑free.
