UNDER THE HOOD
Royal Enfield 550011/E Layshaft Gears – 3rd Gear 18T & 4th Gear 20T OEM for Classic & Bullet
Royal Enfield 550011/E Layshaft Gears – 3rd Gear 18T & 4th Gear 20T OEM for Classic & Bullet
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Please order only after confirming the part number, model, variant, year, side, connector type and compatibility. All orders are non-cancellable once placed. Correctly shipped spare parts are not eligible for return, exchange or refund due to wrong selection, wrong diagnosis, fitment mismatch, mechanic recommendation or change of mind. Electrical/electronic items are additionally non-returnable once opened, installed, plugged in, tested or used. Wrong item, damaged item or missing item claims require a complete unboxing video within 24 hours. Read full Return & Warranty Policy
Restore your Royal Enfield’s transmission performance with the genuine 550011/E Layshaft Gear Set. This OEM part includes both 3rd gear (18 teeth) and 4th gear (20 teeth) on a single shaft, engineered for smooth gear transitions and robust power delivery. It’s a direct replacement for worn, chipped, or noisy layshaft gears used in multiple Royal Enfield UCE motorcycles.
Compatible with all major 350cc and 500cc UCE models, including the Classic, Bullet, Electra, and Thunderbird, as well as the Continental GT 535, this gear set ensures OEM-grade alignment, fitment, and long-term reliability. It is a must-have component during full gearbox rebuilds, restoration projects, or after heavy usage.
Backed by precise factory specs and compatible with original clutch hubs, shafts, and circlips, this part is trusted by mechanics and enthusiasts alike.
📦 Key Features
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✅ OEM Royal Enfield part number 550011/E – direct fit replacement
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✅ Dual gear set: 3rd gear (18T) + 4th gear (20T) integrated on shaft
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✅ Compatible with 350cc and 500cc UCE models + GT 535
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✅ Precision-machined teeth with heat-treated finish
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✅ Eliminates gear noise, slippage, or hard shifting
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✅ Ideal for engine rebuilds, transmission restoration, or preventive upgrades
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✅ Plug-and-play fitment with original gearbox assembly
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✅ Ships securely packed from underthehood.co.in
🧾 Confirmed Compatibility
| Model | Engine Type | Compatibility |
|---|---|---|
| Classic 350 (UCE) | 346cc | ✅ Yes |
| Bullet 350 (UCE) | 346cc | ✅ Yes |
| Electra 350 (UCE) | 346cc | ✅ Yes |
| Thunderbird 350 (UCE) | 346cc | ✅ Yes |
| Classic 500 (BS3 & BS4) | 499cc | ✅ Yes |
| Bullet 500 (BS3 & BS4) | 499cc | ✅ Yes |
| Thunderbird 500 (BS3 & BS4) | 499cc | ✅ Yes |
| Continental GT 535 (GT 535) | 535cc | ✅ Yes |
| Himalayan / Meteor / 650 Twins | — | ❌ Not Compatible |
🧠 FAQs
Q. Which motorcycles are compatible with 550011/E?
A. This gear fits most Royal Enfield UCE motorcycles including Classic 350/500, Bullet 350/500, Electra 350, Thunderbird 350/500, and Continental GT 535.
Q. Is this part OEM or aftermarket?
A. This is a genuine OEM Royal Enfield part – not a replica or aftermarket replacement.
Q. What problems does it fix?
A. Fixes chipped, noisy, or worn gears and improves gear shifting smoothness and engagement between 3rd and 4th gear.
Q. Can this be used for 5-speed RE models like Himalayan or Meteor?
A. ❌ No. Those models have different transmission architecture and gear ratios.
Q. Does it come with circlips or bearings?
A. No. This listing is only for the 550011/E layshaft gear unit. Circlips and other gearbox internals must be ordered separately.
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Verify Fitment on Official Brand Portals
Verify Fitment on Official Brand Portals
For selected genuine spare parts, you can cross-check the part number on the official brand portals before ordering.
Royal Enfield Official Spares Portal
Hero MotoCorp Official eCatalogue
