Compatible Engines Royal Enfield J-Series Engine
Compatible Models Hunter 350, Classic 350 Reborn, Meteor 350
Big Bore Size78 mm72 mm Stock Stroke85.8 mm85.8 mm New Displacement (Approx.) 410 cc349 cc
Compression Ratio (Approx.)9.8:1 to 10:1 (Slight increase over stock)9.5:1Piston Type High-Quality Cast Aluminum (Often based on RE 411
Cylinder Type New Cylinder Barrel with a new liner (Not just a rebored stock cylinder) OEM/Stock
ECU Requirement Recommended (Optimal performance achieved with proper ECU tuning/remap)
NMW Racing J-Series 410cc Big Bore & Stage 3 Camshaft Combo
| Component | Purpose / Specifics |
| 1. Cylinder Barrel | New 78mm Big Bore Cylinder Barrel/Block Assembly. |
| 2. Piston Assembly | High-Quality Piston (Cast or Forged) for 78mm bore. |
| 3. Piston Rings | Complete set of Piston Rings for the new piston. |
| 4. Piston Pin & Clips | Piston Pin and Circlips required for assembly. |
| 5. Gasket Kit | New Head Gasket and Base Gasket. |
| 6. Racing Camshaft | Stage 3 High-Lift Billet Steel Camshaft. |
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