Product Description
The 570834/A Jet Needle, as shown in image_855a75.png, features the technical specification 4DHL42-2. It is an authentic Original Equipment (OE) spare part manufactured to the exact tolerances required for Royal Enfield’s carbureted engines. The tapered design of the needle, visible in image_855a75.png, works in conjunction with the needle jet to precisely regulate fuel flow as the carburetor slide rises.
Over time, the original needle can develop wear marks or “shoulders” due to constant vibration against the needle jet, leading to a rich or erratic mid-range performance. Replacing a worn needle with this genuine part restores factory-spec throttle response and prevents “stuttering” during transition phases of riding.
Key Features:
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Genuine Royal Enfield Part: Guaranteed 100% authentic (Part No. 570834/A) as seen in official packaging in image_855a1b.png.
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Precision Taper (4DHL42-2): Calibrated specifically for the BS29 CV carburetor to maintain the perfect stoichiometric ratio.
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Hardened Material: Designed to resist the abrasive effects of fuel and constant mechanical movement.
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Optimized Performance: Ensures crisp mid-range throttle response and helps maintain consistent mileage.
Technical Specifications:
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Brand: Royal Enfield Genuine
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Part Number: 570834/A
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Needle Code: 4DHL42-2
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Carburetor Type: BS29 CV
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MRP: ₹305.00 (Incl. of all taxes)
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Country of Origin: India
Motorcycle Compatibility
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Royal Enfield Classic 350 (Carbureted models)
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Royal Enfield Bullet 350 / Standard 350
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Royal Enfield Thunderbird 350
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Note: Specifically for models equipped with the UCE 350 engine and BS29 CV carburetor.









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