Norton Main Fuel Tap (Petcock) – Flat Lever, 1/4″ BSP, Viton Seals (06-4511)

Stop fuel leaks and restore proper fuel flow with this late-type Norton Main Fuel Tap — the correct factory-specification petcock for Norton Commando and Dominator motorcycles. This is the Main tap (ON/OFF), which controls the primary fuel supply to your carburettor. It pairs with the Reserve tap (06-4512) to give you full main and reserve fuel management.

Featuring a flat chrome lever with an indicator plate showing ON and OFF positions, this tap uses a 1/4″ x 1/4″ BSP thread and is fitted with premium Ethanol-resistant Viton seals — a critical upgrade over the original cork seals that deteriorate with modern pump fuel blends. Supplied complete with a removable screen filter, brass locknut, and Dowty sealing washer for a leak-free installation.

What’s Included

• Main fuel tap (chrome flat lever)
• Removable inline screen filter
• Brass locknut
• Dowty sealing washer

Specifications

• OEM Part Number: 06-4511 / 60-4511 / 604511
• Tap Type: Main (ON/OFF)
• Thread: 1/4″ x 1/4″ BSP
• Lever Style: Flat chrome
• Seals: Ethanol-resistant Viton
• Indicator: Yes (ON / OFF plate)
• Filter: Removable screen filter included

Compatibility

This fuel tap fits all Norton and Triumph models equipped with 1/4″ BSP tank threads, including:

• Norton Commando 750 (1969–1973)
• Norton Commando 850 (1973–1977)
• Norton Dominator (late models)
• Triumph T140 Bonneville (750cc)
• Triumph TR7 Tiger
• Triumph T150 Trident / T160
• Any British motorcycle with 1/4″ BSP fuel tank thread

Note: This is the Main tap only. If you need both taps, see our matching Reserve tap (06-4512). The two taps are typically fitted one per side of the fuel tank.

Sourced from Norvil Motorcycle Co. in the UK and sold in the United States exclusively by Fair Spares New England — your trusted source for genuine Norton and British motorcycle parts.