Genuine Royal Enfield Front Fork Outer Tube (LH) for Thunderbird X 350 / Thunderbird X 500 (BS4) | 1120016/A

Replace a bent, pitted, or damaged fork leg the correct way with the Genuine Royal Enfield Front Fork Outer Tube – Left Hand (LH), Part No. 1120016/A. This is the LH fork outer tube (often searched as “left fork leg”, “left shock pipe”, “front fork outer”, “front suspension outer tube”) used on the Royal Enfield Thunderbird X platform (BS4). 

A worn or bent outer tube can cause fork oil leakage, uneven suspension travel, front-end wobble, premature seal wear, and poor braking stability—especially noticeable during hard braking or on rough roads. Using a genuine OEM-spec tube helps ensure correct alignment, bushing fit, and long-term seal life versus inconsistent aftermarket dimensions. 

This part is specifically listed as OUTER TUBE–LH (1120016/A), and the matching right side is 1120015/A (OUTER TUBE–RH)—helpful if you’re rebuilding the full front end or correcting twist/bend after an impact. 

Key Features 

• Genuine Royal Enfield front fork outer tube (LH)

• Part Number: 1120016/A

• Official description: OUTER TUBE–LH

• Designed for Thunderbird X (BS4) front suspension assembly 

• Correct OEM geometry for proper fork alignment and handling stability

• Recommended replacement for bent tube / deep pitting / seal damage causes

• Best practice: replace fork oil seals + fork oil during installation (reduces repeat leakage)

• Pair-reference: RH side uses 1120015/A 

Compatibility Table 

Do not assume fitment for Classic/Bullet/Electra/Thunderbird (non-X), UCE/J-Series/650 Twins/Himalayan unless your microfiche confirms 1120016/A.

Variants

• LH (Left Hand): 1120016/A (this listing) 

• Matching part (reference): RH (Right Hand): 1120015/A

FAQs 

Q1. What exactly is 1120016/A?
It is the Front Fork Outer Tube – LH (Left Hand) for Thunderbird X models. 

Q2. Will this fit Thunderbird 350/500 (non-X) or Classic/Bullet/Electra?
Not confirmed by the sources used for 1120016/A. This listing is restricted to Thunderbird X 350/X 500 (BS4) only. 

Q3. My fork is leaking oil—do I need this part?
Not always. Leaks can be from oil seal/dust seal damage, but a pitted/bent tube can repeatedly ruin new seals. Inspect the tube surface and straightness.

Q4. Should I change anything else during replacement?
Recommended: fork oil seals + fork oil, and inspect bushings for play. This reduces repeat leakage and improves feel.

Q5. How do I confirm LH vs RH before ordering?
LH/RH is defined from the rider’s sitting position. If unsure, match your old part number or confirm via microfiche: 1120016/A = LH