Royal Enfield 1120077/A – Handlebar Counter Weight / Damper Weight (Nickel Plated) for Thunderbird X 350 & Thunderbird X 500 (BS4)

Royal Enfield part 1120077/A is the genuine handlebar counter weight / damper weight used on the flat, sport-style handlebar of the Thunderbird X 350 and Thunderbird X 500 (BS4). In the official Thunderbird X 350 & X 500 exclusive parts catalogues, this part appears as “Damper Weight (Nickle Plated)” with quantity 2 per bike, mounted at both bar ends.

These counter weights are not just cosmetic. They are tuned to reduce handlebar vibration, improve high-speed stability and give the TBX its distinctive bar-end look. Over time, weights often get scratched, rusted, or lost during falls or aftermarket grip/lever upgrades. Replacing them with cheap local pieces usually means wrong thread, wrong length or wrong weight – leading to vibrations, loose fitment or misaligned grips.

The 1120077/A damper weight is manufactured to Royal Enfield’s original spec, with correct mass, length, shoulder and thread to work with the OE handlebar 1120089/A and grip set (1120060/A & 1120061/A).

This listing is ideal for owners restoring a Thunderbird X after an accident, removing cheap aftermarket bar-ends, or returning the bike to full stock condition. Sold AS A SET OF 2 PCA (both side) 

Key Features

• Genuine Royal Enfield part 1120077/A – factory handlebar counter weight / damper weight.

• Listed in Thunderbird X 350 & X 500 exclusive parts catalogue as “Damper Weight (Nickle Plated)”, 2 required per bike.

• Correct mass and dimensions to reduce handlebar vibrations and improve rider comfort.

• Precision-cut threads for direct fit on OE handlebar 1120089/A, no drilling or modification needed.

• Nickel-plated finish for corrosion resistance and a clean, premium look.

• Works perfectly with stock Thunderbirds X grips 1120060/A (LH) & 1120061/A (RH) – no gaps or misalignment.

• OEM replacement – same part that comes fitted from the factory, not a universal bar-end.

• Ideal for crash repair, bar swap back to stock, or cosmetic refresh of scratched / rusty weights.

Compatibility Table

Not confirmed: Standard Thunderbird 350/500, Classic/Bullet/Electra UCE, J-Series (Classic Reborn, Bullet 350 J, Meteor, Hunter), Himalayan/Scram, and 650 Twins. Some aftermarket sellers call it “universal”, but official catalogues confirm it specifically for Thunderbird X 350 & 500 only.

Variants

• This listing:

  • Part Number: 1120077/A

  • Description: Counter Weight / Damper Weight – Handlebar (Nickel Plated)

  • Quantity: 2 piece (both side)

• Recommended complementary parts (not included):

  • 1120060/A – Grip LH for Counter Weight (Thunderbird X)

  • 1120061/A – Hand Grip RH with rotor (Thunderbird X 350)

FAQs

Q1. Is 1120077/A sold as a pair or single piece?
Now sold as a set of 2 PCS 

Q2. Will this fit my standard Thunderbird 350/500 or Classic 350?
Official Royal Enfield documents only confirm 1120077/A for Thunderbird X 350 and Thunderbird X 500 BS4. Other models may use different weights and threads, so we treat those applications as not confirmed. Please verify via VIN and microfiche before ordering for another bike.

Q3. Does this include mounting bolts or hardware?
The part number 1120077/A refers to the counter weight only. It reuses the stock bar-end screw/bolt from your Thunderbird X handlebar assembly. If your hardware is damaged or missing, please contact us for compatible fasteners.

Q4. What material and finish does this weight have?
The catalogue describes it as “Damper Weight (Nickle Plated)”, and multiple dealer listings show it as a metal bar-end with nickel/silver finish – durable, rust-resistant and matching the OE Thunderbird X look.

Q5. Does it help reduce handlebar vibration?
Yes. The main purpose of the damper weight is to add mass at the bar ends, which helps absorb high-frequency vibrations from the UCE engine and makes highway cruising and city rides more comfortable.