Yamaha Genuine YZF600R Thundercat Valve Stem Seal 4TV-12119-00

Product Description

Yamaha Genuine factory valve stem oil seal (SEAL, VALVE STEM). Precision-molded from oil-resistant fluoroelastomer (FKM/Viton) with an internal steel garter spring ring, this OEM valvetrain seal mounts onto the valve guide inside the cylinder head to meter lubrication along the valve stem while preventing excess oil from leaking into the combustion chamber or intake/exhaust ports.

Vehicle Compatibility

Standard Genuine replacement fitment for Yamaha four-cylinder sport and supersport platforms:

Fitment & Technical Details

Installs directly over the valve stem guides inside the cylinder head valve pocket. Use a dedicated valve stem seal driver tool or socket during installation to seat the seal body firmly over the valve guide shoulder without damaging the flexible inner sealing lip. Always lubricate the valve stem with clean engine oil or assembly lube before inserting it through the new seal lip.

Important: Please ensure the part number matches your motorbike before purchasing. If you have any questions about the part or its compatibility, feel free to contact us. We’re here to help!

At Dmmotorcycles, we’ve specialized in vintage and vintage sports motorcycles and parts directly from Japan since 1998. We stock a wide selection of rare genuine and high-quality aftermarket parts and continually update our inventory to meet growing demand.

Looking for a specific part? Don’t hesitate to ask! We may have it in stock even if it’s not listed online. If not, we’ll do our best to source it for you.

We’re also happy to provide guidance on installation and offer excellent after-sales support to ensure your satisfaction.

Shipping Information

We ship worldwide, carefully inspecting and securely packing all parts to ensure safe delivery. Your order will be insured and shipped quickly, with the best available shipping option chosen for speed and reliability.

Please note:

• All parts are shipped from Cyprus (Europe).
• Customers outside the EU may incur additional import taxes based on the value of the item.