• 594102/A rider seat lock – Royal Enfield Thunderbird
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UNDER THE HOOD

594102/A – Lock, Rider Seat for Thunderbird 350 (UCE), Thunderbird 500, Thunderbird 350 ABS / Thunderbird 500X (BS4) – Genuine Royal Enfield

594102/A – Lock, Rider Seat for Thunderbird 350 (UCE), Thunderbird 500, Thunderbird 350 ABS / Thunderbird 500X (BS4) – Genuine Royal Enfield

Rs. 106.00
Rs. 110.00 Rs. 106.00
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This is the genuine Royal Enfield 594102/A – LOCK, RIDER SEAT used on the Thunderbird family to secure the rider seat to the frame. Dealer/microfiche entries list it exactly as “LOCK – RIDER SEAT (594102-A)” for Thunderbird 350, Thunderbird 500 and the later Thunderbird 350 ABS / Thunderbird 500X BS4 models. That means the mounting points and latch geometry are already matched to your OE seat pan and side panel — no drilling or jugad.

Use this when the original latch is missing, seized, or no longer holding the seat tight. An OE seat lock stops the seat from lifting at speed and keeps the toolkit/ECU area safe from water and casual tampering. Because this is an original part, the spring rate, striker slot and bracket offset are correct for the TB frame, so it closes with the same “factory” feel when you push the seat down. To cut returns, we’re listing only the Thunderbird fitment confirmed by two+ sources. 

Key Features

  • Genuine 594102/A – Lock, Rider Seat (Thunderbird series).

  • Direct bolt-on for TB 350/500 UCE & TB 350 ABS / TB 500X BS4. 

  • Correct latch geometry for OE seat pan — no wobble, no half-latch.

  • Restores seat security and keeps under-seat area protected.

  • Supplied as 1 pc OE, in RE-labelled packaging.

  • Ideal replacement after rust, breakage or missing lock.

Compatibility Table 

Model Platform / Engine BS Stage / Years Notes
Thunderbird 350 (UCE / TBTS) 346cc UCE BS3 Listed as “Lock – Rider Seat 594102/A”. 
Thunderbird 500 (UCE) 499cc UCE BS3 Same lock as TB 350. 
Thunderbird 350 ABS / “NTB 350” / Thunderbird X 350 346cc UCE BS4 (≈2015–2019)
Thunderbird 500X (BS4) 499cc UCE BS4 Uses same rider-seat lock.

Not confirmed: Classic/Bullet/Electra UCE, J-series, Himalayan/Scram, 650 Twins — those use different seat-latch layouts. Order only for TB models above.

Variants

  • Seat striker / hook on seat pan – order separately if your seat side is damaged.

  • Side-panel lock/helmet lock – model-specific (not included in 594102/A).

FAQs

Q1. Is 594102/A the lock or the key?
This is the lock/latch unit for the rider seat. Keys are separate part numbers.

Q2. Will it fit my Thunderbird 500X BS4?
Yes — seller page specifically says “Lock Rider Seat for Thunderbird 500X / Thunderbird 350 ABS (BS4).” 

Q3. My bike is a Classic 350 — can I use this?
Not fiche-confirmed. Classic uses a different seat-mount system, so don’t list it there.

Q4. Do I need to modify the seat?
No, on the TB models above it’s plug-and-play — line up, bolt on, test-latch.

Q5. What if the seat still doesn’t lock?
Check seat striker alignment and rubber bumpers; if the seat pan is bent, fix that first.

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