• Royal Enfield black oil filler cap 1990645 installed on engine cover
  • Classic 350 engine side view with oil filler cap 1990645 Bullet Oil Filler Cap Installation
1 4

UNDER THE HOOD

Royal Enfield 1990645 Black Oil Filler Cap — OEM Machined Aluminium Cap for Classic / Bullet / Electra UCE

Royal Enfield 1990645 Black Oil Filler Cap — OEM Machined Aluminium Cap for Classic / Bullet / Electra UCE

Rs. 870.00
Rs. 930.00 Rs. 870.00
Sale Sold out
Shipping calculated at checkout.

Upgrade your engine bay’s finish with the Royal Enfield Black Oil Filler Cap (Part No. 1990645) — a precision machined aluminium cap with a detachable branded inlay designed to maintain the correct orientation of the logo. According to RE, it fits multiple UCE models including Classic 350/500, Bullet 350/500, Electra 350, and Thunderbird 350/500. 

This cap is made from billet aluminium, offering both durability and premium aesthetic appeal. The inlay is installed last so the Royal Enfield logo remains correctly oriented even after installation. 

Installation is simple and fast — typically around 5 minutes. This is an OEM accessory, which helps maintain the factory look and integrity of your bike while improving styling in a subtle, classy way.

Key Features

  • Genuine Royal Enfield OEM / GMA accessory, part number 1990645 

  • Machined from billet aluminium, durable and elegant finish 

  • Black anodized / black finish style to match modern blacked-out engines

  • Branded inlay installed last to maintain proper logo orientation 

  • Compatible with multiple UCE models: Classic 350/500, Bullet 350/500, Electra 350, Thunderbird 350/500, Thunderbird X 

  • Quick, clean 5-minute installation with existing threads

Compatibility Table

Model / Platform Fitment Status Notes / Source
Classic 350 UCE ✅ Confirmed RE’s listing includes it. 
Classic 500 UCE ✅ Confirmed (same UCE family) Included in compatibility list on RE 
Bullet 350 / Bullet 500 UCE ✅ Confirmed RE site includes Bullet models.
Electra 350 UCE ✅ Confirmed Included in compatibility listing. 
Thunderbird 350 / 500 / X ✅ Confirmed Listed in RE compatibility. 
Other non-UCE (BS6 / J-series etc.) ❓ Not confirmed No evidence in current sources

Variants / Notes

  • This is the black anodized version of the oil filler cap (1990645)

  • RE also mentions a silver version (alternate finish) in the same listing. 

FAQs

Q1: Will this fit my Classic 500 UCE?
A1: Yes — it is explicitly listed in RE’s compatibility list for 500 UCE.

Q2: Does the inlay ever misalign?
A2: No — the inlay is installed last so that the Royal Enfield logo is always correctly positioned during mounting. 

Q3: How long does installation take?
A3: Around 5 minutes — just unscrew old cap, install new with seal, insert logo inlay. 

Q4: Will this cap leak or fail under pressure?
A4: It uses OEM threading and seal; being made of billet aluminium, it should hold reliably when installed with proper torque.

Q5: Does changing the oil filler cap affect warranty?
A5: No — as a genuine RE accessory, installed properly, it should not void warranty.

View full details