0650512 CYLINDER HEAD GASKET 850 COPPER 2MM THICK

Norton 850 Commando Cylinder Head Gasket – Copper, 2mm Thick (Part 0650512)

This is the one. If you’re building or rebuilding a Norton 850 Commando engine and you want a head gasket that seals properly and stays sealed, this Norton 850 Commando cylinder head gasket copper is the correct choice. At 2mm thick, part number 0650512 is the standard-spec gasket for the 850 Commando, and copper is the right material — it conforms to the head and barrel mating surfaces, handles the heat cycles these parallel twins generate, and delivers a compression seal you can trust mile after mile.

The 850 Commando is one of the finest motorcycles Norton ever built. Its engine is robust, characterful, and capable of outstanding longevity when rebuilt with correct-specification parts. A head gasket is one of the most critical seals in the engine — it holds your compression in, keeps combustion gases out of the coolant passages, and prevents oil migration around the studs. Getting this right from the start saves you from pulling the head again six months down the road.

Copper gaskets work best with properly prepared mating surfaces. Make sure your head and barrel are flat, clean, and free of old gasket material before fitting. Torque to factory spec, re-torque after the first heat cycle, and you’ll have a seal that lasts the life of the engine.

Specifications

• Material: Copper
• Thickness: 2mm
• Part Number: 0650512

Fitment

• Norton Commando 850 – all variants

Stocked and shipped by Fair Spares New England — specialists in Norton Commando and British twin parts. Not sure if this is the right thickness for your engine? Give us a shout before you order.