High-Voltage Heat-Resistant Red Silicone Spark Plug Cap for Hero Motorcycles - Part Code: 30700ACK00099S

Direct OEM Fitment: Engineered under Part No. 30700ACK00099S to press-fit securely over standard 10mm/12mm spark plug terminal nuts across Hero 100cc–125cc motorcycles.

100% Waterproof Sealing: Flexible elastomeric rubber boot seals around both the ignition lead cable and the ceramic spark plug body to block water penetration.

High-Heat Resistance: Special silicone-blend rubber housing resists engine cylinder head heat without hardening, cracking, or degrading over time.

Corrosion-Resistant Internal Brass Connector: Premium internal threaded brass core grips the high-tension wire for minimal resistance and maximum spark delivery.

Vibrant Red Styling: Eye-catching red finish adds a custom sporty look to your motorcycle’s engine bay while making visual inspection fast and easy.

Ensure uninterrupted ignition current and complete water insulation with the Red Spark Plug Cap for Hero Motorcycles (Part No. 30700ACK00099S). Designed to meet strict Hero MotoCorp electrical standards, this vibrant red elbow-type spark plug cap forms a tight, waterproof seal over the spark plug terminal end. Manufactured from high-grade, heat-resistant elastomeric rubber with internal brass thread contacts, it protects high-voltage current transfer from the HT coil cable to the spark plug—preventing electrical short-circuiting during heavy monsoons, water washes, and muddy off-road conditions.

A cracked, aged, or loose spark plug cap lets high-voltage current leak to the cylinder head during damp weather, causing sudden engine cut-offs, hard starting, and sluggish throttle pickup. Upgrading to the 30700ACK00099S Hero red spark plug cap guarantees a moisture-proof seal, smooth engine idling, and dependable starting in all weather conditions.

Recognizing Spark Plug Cap Failure Symptoms

Engine Stalling in Rain or Water Washes: The bike cuts off unexpectedly when splashing through puddles, washing the engine bay, or riding in heavy rain.

Visible High-Voltage Arcing: Blue electrical sparks visible jumping from the cap to the engine block in dark conditions due to microscopic cracks in the rubber.

Misfiring & Hesitation Under Acceleration: Engine stutters or jerks under load because voltage leaks prevent full spark energy from firing the plug gap.

Loose Fit on Spark Plug: Cap slips off the spark plug tip easily due to worn internal retention clips or enlarged rubber boots.

Maintenance & Installation Best Practices

Thread Cable Firmly: When attaching to the HT ignition wire, push and twist Part No. 30700ACK00099S clockwise until the internal brass screw bites firmly into the cable core wire.

Inspect Boot Lips: Periodically inspect both rubber sealing lips (cable side and plug side) for tears, mud buildup, or oil contamination; wipe clean to maintain a tight seal.

Push Until Clicked: Always press the cap firmly onto the top of the spark plug until you feel and hear the internal connector snap securely onto the terminal end.