Product Description
The F 002 G40 533 is engineered with a Nickel-Yttrium ground electrode and a large copper core. This combination is specifically designed to handle the higher operating temperatures of air-cooled 110cc–125cc scooter engines and modern adventure motorcycles. The UR5AC features a specialized “projection” design that places the spark deeper into the combustion chamber, ensuring a more complete fuel burn and reduced carbon fouling.
As a resistor-type plug, it effectively suppresses electrical noise, protecting the sensitive Electronic Control Units (ECUs) found in BS4 and BS6 compliant vehicles. The housing is nickel-plated for superior corrosion resistance, ensuring the plug remains easy to remove from the cylinder head during routine maintenance.
Key Features:
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Enhanced Heat Dissipation: The copper core center electrode provides superior thermal conductivity, preventing “pinging” or pre-ignition under load.
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Corrosion Protection: Nickel-plated threads and housing eliminate the need for anti-seize lubrication and protect against seizing in aluminum heads.
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Stable Idling: Optimized electrode gap ensures a steady spark even at low RPMs, reducing engine vibrations and stalling.
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Resistor Suppression: Built-in resistor prevents interference with digital speedometers and fuel injection sensors.
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Cold Start Reliability: Ribbed insulator design prevents high-voltage “flash-over,” providing reliable ignition in cold or humid weather.
Technical Specifications:
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Part Number: F 002 G40 533 (UR3AC)
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Brand: Bosch Genuine
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Thread Diameter: 10 mm
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Hex Size: 16 mm (5/8″)
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Reach: 12.7 mm
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Electrode Material: Nickel-Copper-Yttrium
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Gap: 0.7 mm – 0.8 mm (Factory Preset)
Vehicle Compatibility:
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Honda: Activa 125 (All Models), Grazia, Aviator (110cc/125cc), Activa 6G/H-Smart (Check manual for specific variant).
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Royal Enfield (Check for UR5AC vs UR3CC requirements based on manufacturing year).
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Hero Motocorp: Maestro Edge (110/125), Duet, Pleasure+ (110cc).
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TVS Motors: Jupiter 125, Ntorq 125 (Secondary fitment/Check variant).









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