Royal Enfield Piston Pin – 1570403/B
The Royal Enfield Piston Pin is an important engine component that connects the piston to the small end of the connecting rod, allowing the piston and connecting rod to move together during engine operation.
Also called a gudgeon pin or wrist pin, it is fitted through the piston pin bore and connecting rod small end. Correct fitment is essential for proper engine assembly and reliable operation.
This genuine Royal Enfield spare part is identified as PIN-PISTON, part number 1570403/B, in parts listings. It is intended for compatible J-Series 350 engine applications, subject to confirmation of the exact part number.
Order from EAZ Store – Enfield and Activa Zone and verify your motorcycle’s VIN or official parts catalogue before purchase.
Key Features
- Genuine Royal Enfield spare part
- Part number: 1570403/B
- Product name: Pin – Piston
- Also known as a gudgeon pin or wrist pin
- Connects the piston to the connecting rod
- Suitable for compatible engine rebuilding and repair
- Professional installation recommended
Compatibility
For compatible Royal Enfield J-Series 350 motorcycles, subject to part-number verification:
- Royal Enfield Classic 350 Reborn
- Royal Enfield Meteor 350
- Royal Enfield Hunter 350
- Royal Enfield New Bullet 350
Important: Confirm the suffix and fitment using your motorcycle’s VIN or official Royal Enfield parts catalogue. Different piston-pin revisions may exist, so do not order based on engine capacity alone.
Product Specifications
- Brand: Royal Enfield
- Part Number: 1570403/B
- Product Name: Pin – Piston
- Alternative Names: Gudgeon Pin / Wrist Pin
- Category: Engine / Piston Assembly
- Application: Compatible J-Series 350 engines
- Quantity: 1 piece
Package Contents
1 × Royal Enfield Genuine Piston Pin (1570403/B)
Piston, connecting rod, circlips and other engine components are not included unless specified separately.
Installation
Professional installation by a qualified motorcycle mechanic is strongly recommended. Inspect the piston pin bore, connecting rod small end and retaining circlips. Follow the manufacturer’s assembly specifications and use the correct retaining clips.










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