Product Description
The 597405 Valve Kit is a critical engine overhaul component designed for the classic 346cc single-cylinder Royal Enfield engine. This kit includes both the Inlet Valve and the Exhaust Valve, precision-machined to ensure a perfect airtight seal against the valve seats in the cylinder head.
Over time, valves can develop carbon buildup, “pitting,” or warping, leading to a loss of compression, hard starting, and poor fuel economy. Replacing your worn valves with this genuine OEM kit restores the factory-spec airflow and combustion pressure. These valves are manufactured from high-alloy heat-resistant steel, specifically designed to withstand the intense thermal cycles of a long-stroke air-cooled engine.
Key Features:
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OEM Factory Part: 100% original Royal Enfield spare (PN: 597405) ensuring correct stem diameter and head geometry.
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Complete Set: Includes 1x Intake (Inlet) Valve and 1x Exhaust Valve for a total top-end refresh.
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Superior Heat Resistance: Forged from premium steel alloy to prevent “burning” or mushrooming under extreme temperatures.
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Precision Sealing: Ground to exacting tolerances to eliminate compression leaks and restore engine power.
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Direct Replacement: Fits seamlessly into the original 350cc cylinder head without needing oversized guides (unless the head is worn).
Technical Specifications:
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Part Number: 597405
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Material: Specialized Heat-Resistant Alloy Steel
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Engine Type: 350cc Single Cylinder (Cast Iron & early UCE)
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Kit Contents: 1 Inlet Valve + 1 Exhaust Valve
Vehicle Compatibility:
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Royal Enfield Bullet 350 (Standard) (1955 – 2010+)
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Royal Enfield Deluxe / Machismo 350
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Royal Enfield Electra 4S/5S (Cast Iron & early models)
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Royal Enfield Campus
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Note: This kit is primarily for the Cast Iron models and specific early variants. For modern Classic 350 UCE (BS3/BS4/BS6) models, the updated part number is typically 888293.










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