EVAP Charcoal Canister (Emissions Canister) for Interceptor 650 / Continental GT 650 – 591621/A (Euro 4 / EVAP System)

Royal Enfield part 591621/A is the EVAP charcoal canister (also called emissions canister / vapor canister / charcoal canister) used in the motorcycle’s evaporative-emissions (EVAP) system. It stores fuel vapours from the tank and routes them back to the intake via the purge circuit, helping prevent fuel smell, venting issues, and EVAP-related fault symptoms on EVAP-equipped 650 Twins.

Replace the canister when it’s cracked, fuel-soaked, blocked, or the bike smells strongly of petrol near the rear/side panel area, or if you’re troubleshooting EVAP purge/vent lines after a fall or long storage. Using the correct OEM-spec canister matters because hose routing and fitment (brackets/ports) must match the factory EVAP system layout.

Also searched as: “Interceptor 650 charcoal canister”, “GT 650 evap canister”, “RE 591621 canister”, “fuel vapour canister”.

Before you buy: This fits only EVAP-equipped bikes—confirm your bike has an EVAP canister + matching hose layout/ports before ordering.
Suggested internal links: Royal Enfield Interceptor 650 Spares, Continental GT 650 Spares, Emissions/EVAP Parts, Fuel Tank & Breather Hoses.

Key Features

• Genuine-spec EVAP charcoal canister for fuel vapour control

• Correct fit for 650 Twins EVAP system applications verified in dealer microfiche listings

• Helps address fuel vapour smell, EVAP vent restriction symptoms, and cracked canister leaks

• Direct replacement form factor for EVAP-equipped setups (mounting + hose ports)

• Ideal for restoring factory emissions routing after damage or saturation

• Part number search friendly: 591621/A, 591621A, 591621

• Best practice: replace/inspect EVAP hoses & clamps during install

• Return-prevention: confirm EVAP presence + port orientation before dispatch

Compatibility Table 

Explicit exclusions: Not for models without an EVAP canister setup; not for 350/500 UCE/J-series models.

Variants
No variants.

FAQs 

Q1 (Fitment): How do I confirm if my bike needs this 591621/A canister?
Check your bike for an EVAP canister unit (usually mounted near the rear/side area) with multiple EVAP hoses. Match port count + port direction + mounting bracket to your existing unit. If possible, confirm by VIN + EVAP system diagram.

Q2 (Fitment): Will this fit BS6 India Interceptor/GT 650?
Not guaranteed. EVAP systems differ by market/emission spec. Treat India BS6 fitment as unverified unless your bike already has the same canister and hose routing. Use photo matching before purchase.

Q3 (Comparison): OEM canister vs cheaper aftermarket—what’s the real difference?
EVAP canisters must match flow/adsorption spec, hose port layout, and mounting. Wrong spec can cause vapour smell, vent restriction, or poor purge behaviour. OEM-spec fitment reduces trial-and-error and returns.

Q4 (Installation): Any precautions while installing an EVAP canister?
Label hoses before removal, avoid kinks, and ensure hoses are fully seated with clamps. Inspect purge/vent hoses for cracks; replacing brittle hoses often prevents repeat issues.

Q5 (Symptoms): What problems does a bad EVAP canister cause?
Common signs: strong fuel smell, fuel tank venting issues, saturated canister after overfill, cracked housing, and intermittent EVAP-related running/idle complaints (market-dependent).

Q6 (Returns-prevention): What photo should I send to confirm fitment before shipping?
Send a clear photo of your existing canister showing part label (if any), ports, and mounting area, plus a photo of the hose routing into/out of the canister. VIN helps for microfiche confirmation.