The Royal Enfield 570166/C Valve Seat Insert, Inlet is a genuine OEM engine component used in the UCE 350cc cylinder head.
Royal Enfield parts catalogue data identifies 570166/C as “Valve Seat Insert – Inlet (350cc)” and specifies one piece for the cylinder-head assembly.
The inlet valve-seat insert provides the seating surface against which the inlet valve closes, helping maintain proper combustion-chamber sealing and correct cylinder-head operation.
This is an internal engine component normally installed during cylinder-head repair, valve-seat replacement or engine rebuilding. Correct machining, interference fit and valve-seat alignment are essential during installation.
Important Part Number Difference
Do not confuse this part with the 500cc inlet valve-seat insert. Royal Enfield catalogue data specifies:
- 570166/C — Valve Seat Insert, Inlet — 350cc
- 571036/B — Valve Seat Insert, Inlet — 500cc
Key Features
- Genuine Royal Enfield OEM replacement part
- Part Number: 570166/C
- Exact Description: Valve Seat Insert, Inlet
- Specifically for 350cc UCE cylinder head
- Inlet valve-seat application
- Precision engine component
- Designed for correct inlet-valve seating
- Suitable for cylinder-head repair and engine rebuilding
- OEM-specification replacement
- 1 piece required per applicable cylinder head
Compatibility
- Royal Enfield UCE 350cc
- Bullet 350 UCE
- Electra 350 UCE
- Classic 350 UCE
- Thunderbird 350 UCE
The Royal Enfield UCE catalogue identifies 570166/C specifically as the 350cc inlet valve-seat insert, while the Thunderbird catalogue separately identifies it as the 350cc version.
Important: This is not the 500cc inlet valve-seat insert. For the 500cc application, Royal Enfield lists 571036/B.
Application
Cylinder Head / Inlet Valve / Valve Seat
Package Includes
- 1 × Royal Enfield 570166/C Valve Seat Insert, Inlet











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