Cylinder Head Collar Screw M8x35 for KTM/Husqvarna 250/300 03-26 - 54830079000

This OEM collar screw (M8x35) is a critical fastener designed specifically for the cylinder head assembly of high-performance 2-stroke engines. It ensures a secure, leak-proof seal between the cylinder and the head, maintaining optimal compression and cooling efficiency. As an authentic factory part, it meets the exact specifications required for durability and heat resistance.

This part fits an extensive range of 250cc and 300cc models from 2003 to 2026. Compatible bikes include the KTM 250/300 SX, XC, EXC, and XC-W (including TPI and TBI models), Husqvarna TC, TE, and TX 250/300 series, and GasGas EC, EX, and MC 250/300 models. It also fits specialized editions like the Erzbergrodeo, Rockstar, and Heritage versions.

Featuring a 13mm hex head (WS 13) and a built-in flange, this screw provides even pressure distribution without the need for a separate washer. The high-grade steel construction is designed to withstand the thermal expansion and vibration common in off-road racing environments. Replacing worn or stretched head bolts is essential during top-end rebuilds to prevent head gasket failure.

When installing, always follow the manufacturer's torque specifications and tightening sequence to ensure even clamping force. It is recommended to inspect these bolts for signs of stretching or thread damage whenever the cylinder head is removed. Using fresh OEM hardware ensures the long-term reliability of your engine's top end.

Check compatibility list below to see if this part fits your motorcycle model.