The Front Sprocket Nut with Oil Seal (Top Gear Nut Kit) is a high-quality aftermarket replacement designed for Royal Enfield Old Model Bullet Cast Iron (CI) Engine motorcycles. This essential kit includes the front sprocket (top gear) retaining nut and the gearbox oil seal, ensuring the sprocket remains securely fastened while preventing gearbox oil leakage.
Manufactured from high-strength hardened steel, the sprocket nut features precision-cut threads for a secure fit, while the premium-quality oil seal provides effective sealing against dust, dirt and oil leakage. Together, they help maintain proper gearbox operation, improve reliability and extend component life.
Ideal for gearbox repairs, engine restoration and routine maintenance, this kit offers OEM-quality fitment and dependable performance.
Key Features
- Premium Aftermarket Replacement
- Front Sprocket Nut (Top Gear Nut)
- Gearbox Output Shaft Oil Seal Included
- High-Strength Hardened Steel Nut
- Premium Rubber Oil Seal
- Precision-Cut Threads
- Helps Prevent Gearbox Oil Leakage
- Secure Front Sprocket Fastening
- Wear & Corrosion Resistant
- OEM-Quality Fit & Finish
- Direct Replacement
- Long Service Life
Compatibility
Compatible With:
- Royal Enfield Bullet 350 Old Model (Cast Iron / CI Engine)
- Royal Enfield Bullet 500 Old Model (Cast Iron / CI Engine)
- Royal Enfield Standard 350 (CI)
- Royal Enfield Standard 500 (CI)
- Royal Enfield Electra Cast Iron Models (Compatible Variants)
Not Compatible With:
- Royal Enfield UCE Models
- Royal Enfield Classic 350 UCE
- Royal Enfield Classic 500 UCE
- Royal Enfield Classic Reborn (J-Series)
- Royal Enfield Bullet 350 J-Series
- Royal Enfield Meteor 350
- Royal Enfield Hunter 350
- Royal Enfield Thunderbird Models
- Royal Enfield Himalayan Models
- Royal Enfield Interceptor 650
- Royal Enfield Continental GT 650
Note: This is a premium aftermarket replacement part and is not a Genuine Royal Enfield product. Please compare your existing parts with the product image before ordering to ensure correct fitment.
Package Includes
- 1 × Front Sprocket Nut (Top Gear Nut)
- 1 × Gearbox Output Shaft Oil Seal










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