JL Motorsport Billet High-Compression Cylinder Head

Take your Yamaha DTR/TZR/TDR 125/170cc engine to the next level with the JL Motorsport Billet High-Compression Head, precision CNC-machined from high-quality 7075 aluminium and anodized for improved durability and finish. Designed to increase compression, torque and top-end power, this head also helps broaden the engine's powerband, making it a great upgrade for both performance and competition builds. The interchangeable combustion chamber allows different chamber designs to be used for further tuning and compression-ratio adjustment. The head is O-ring sealed for reliable sealing and incorporates additional head support for improved rigidity. Features High-compression design Interchangeable combustion chamber O-ring sealed Additional head support CNC-machined from high-quality 7075 aluminium Anodized finish Compatible with Athena 170cc and standard 125cc cylinders Increased torque and top-end power Wider and more usable powerband Kit Includes 1 × JL Motorsport billet cylinder head cover 1 × Custom-designed combustion chamber 5 × Copper washers 3 × Viton O-rings Developed by JL Motorsport for riders looking for more performance, adjustability and reliability from their Yamaha 125/170cc engine. Made in Portugal Shipping takes usually 10 Working days to UK and European Union.