Royal Enfield 574184/C – Tappet Adjusting Nut OEM for 350 J-Series (Classic, Meteor, Hunter & Bullet)

NOW SOLD AS A SET OF 2 PCS

Secure your valve clearance with the genuine Royal Enfield 574184/C Tappet Adjusting Nut. This OEM nut locks the tappet adjuster in place, ensuring stable lash, accurate valve timing, and silence in your top end. Ideal when your adjuster is loose, threads are worn, or when replacing worn oval-shaped nuts that let clearance drift.

574184/C is used on many 350 J-Series models — Classic 350 UK/Euro V, Bullet 350, Meteor 350, and others. Ships as genuine factory spec, with correct thread & seating finish. Many suppliers require a minimum quantity of 2, reflecting that both intake & exhaust valves often need this nut during overhaul. Replace worn components with OEM parts like this to retain engine smoothness, eliminate noise, and avoid damage to tappet adjuster. Before ordering, compare your existing nut (thread size, seat finish, locking type) to ensure compatibility.

Key Features:

• Genuine Royal Enfield 574184/C Nut, Tappet Adjusting part 

• Correct thread & OEM spec fit for J-Series 350 valvetrain adjuster position

• Helps lock in tappet adjusters securely, prevents lash drift & engine noise

• Durable finish & material to resist vibration & wear

Compatibility Table: All Indian +

Variants:

• Part number 574184/C (suffix “/C”) — ensure this matches your existing part’s suffix if stamped.

• Supplied as 2 nut; for full replacement of both intake & exhaust, need 2 pieces.

• Finish and locking type per OEM spec; no alternate versions documented prominently in sources.

FAQs:

1. How many nuts do I need for full valvetrain overhaul?
   → Two (one for intake, one for exhaust) is typical. Order qty 2.

2. Does this fit all J-Series 350 models?
   → Yes, for most J-Series 350s (Classic UK/Euro V, Meteor, Bullet).

3. What are signs I need to replace this nut?
   → Loose adjuster, regular lash loss, ticking noise at idle, visible wear or rounding of the nut, inability to lock adjuster properly.

4. OEM or aftermarket — what difference?
   → OEM ensures correct thread pitch, seat design, and durability. Aftermarket may be weaker material or poor locking which can lead to adjuster slippage.

5. Will replacing this stop all valve noise?
   → It helps, particularly if nut looseness or wear is contributing. But check adjuster screw, probes, rocker arms, & lash settings too. OEM nuts are only one part of the system.