Product Description
The SAP0816 is an essential upgrade for the unique electrical demands of the older Machismo and Diesel Bullets. Unlike standard Bullet regulators, this unit is designed to handle the distinct output of the 12V legacy stator systems, preventing the common issue of headlight bulbs blowing out during high-RPM riding.
Constructed with a high-grade aluminum finned body, the regulator is designed for maximum heat dissipation. This prevents the internal electronic components from overheating, which is the leading cause of “dim headlights” or battery drainage on long rides. The unit stabilizes the AC voltage from the alternator and converts it to a steady DC output, ensuring your battery stays charged and your headlight beam remains consistent, regardless of engine speed.
Key Features:
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OE Manufacturer Precision: Manufactured to meet or exceed Royal Enfield OEM Part No. 143777.
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Advanced Voltage Stabilization: Protects your 12V battery from overcharging and prevents voltage spikes from damaging the headlamp.
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Superior Heat Management: The rugged aluminum alloy housing with cooling fins ensures long-term reliability even in extreme Indian summers.
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High-Purity Internal Components: Built with premium-grade silicon rectifiers for high efficiency and minimal power loss.
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Direct Fit: Features a standardized connector for a “plug-and-play” installation into the factory wiring harness.
Technical Specifications:
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Part Number: SAP0816 (Swiss) / DEUS-0816 (Deutsche)
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OEM Reference: 143777
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Brand: Swiss Auto Pvt. Ltd.
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Type: Regulator Rectifier (RR Unit)
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Compatibility: 12V Systems
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Weight: Approx. 539g
Vehicle Compatibility:
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Royal Enfield Machismo A350 (1999–2005)
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Royal Enfield Bullet Diesel (Taurus)
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Royal Enfield Bullet 350/500 (Legacy AC/DC models requiring a similar pin configuration)
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Note: Specifically designed for the Machismo A350 and Diesel variants. For the standard 350cc Cast Iron model, please verify your wiring coupler color.










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