UNDER THE HOOD
Royal Enfield UCE BS4 Purge Valve Assembly 591999/B
Royal Enfield UCE BS4 Purge Valve Assembly 591999/B
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Please order only after confirming the part number, model, variant, year, side, connector type and compatibility. All orders are non-cancellable once placed. Correctly shipped spare parts are not eligible for return, exchange or refund due to wrong selection, wrong diagnosis, fitment mismatch, mechanic recommendation or change of mind. Electrical/electronic items are additionally non-returnable once opened, installed, plugged in, tested or used. Wrong item, damaged item or missing item claims require a complete unboxing video within 24 hours. Read full Return & Warranty Policy
ROYAL ENFIELD 591999/B - PURGE VALVE ASSEMBLY
BULLET X 350 ES ABS - BSIV
CHECK PART NUMBER TO CONFIRM THE MODEL
Genuine Royal Enfield 591999/B purge valve assembly for catalogue-matched UCE BS4 EVAP / fuel-vapour emission-control applications.
Detailed Product Description
Royal Enfield 591999/B Purge Valve Assembly is a genuine Royal Enfield EVAP / evaporative-emission system valve for catalogue-matched UCE BS4 applications.
It is commonly searched as Royal Enfield purge valve, EVAP purge valve, canister purge valve, UCE BS4 purge valve, Bullet 350 ES purge valve, Classic UCE purge valve, Thunderbird UCE purge valve or Royal Enfield 591999/B.
This part should be ordered only when the old part, dealer EPC, service diagnosis, emission-system diagram or packet label confirms 591999/B. Purge valve fitment is emissions-system specific, so do not assume fitment only from the motorcycle name.
What This Product Is
- Genuine Royal Enfield spare part
- Full part number: 591999/B
- Base/search number: 591999
- Factory description: Purge Valve Assembly
- EVAP / evaporative emission control system component
- Used on catalogue-matched Royal Enfield UCE BS4 applications
- Helps control fuel-vapour flow in the emission-control system where fitted
What This Product Is Not
- Not the fuel pump
- Not the fuel injector
- Not the throttle body
- Not the ignition coil or ECU
- Not the charcoal canister unless separately mentioned
- Not a vacuum hose, pipe, clip or complete EVAP kit
- Not a universal purge valve for all Royal Enfield models
- Not for BS3/non-EVAP motorcycles unless the exact catalogue confirms 591999/B
Confirmed Compatibility Table
| Brand | Model / Family | Part Location | Fitment Status | Important Note |
|---|---|---|---|---|
| Royal Enfield | Bullet 350 ES - BSIV | EVAP / purge valve system | Confirmed by The Spares Company listing for 591999 | Verify exact part number before ordering |
| Royal Enfield | Bullet X 350 ES ABS - BSIV | Purge valve assembly | Supported by Under The Hood listing for 591999/B | Use exact part-number confirmation |
| Royal Enfield | Classic / Standard / Thunderbird UCE models | Purge valve assembly | Check before ordering | Third-party seller references mention UCE models, but EPC/VIN confirmation is recommended |
Fitment Not Confirmed / Check Before Ordering
| Model / Use Case | Status | Reason to Check |
| Classic UCE / Standard UCE / Thunderbird UCE | Check before ordering | Some sellers mention broader UCE fitment, but exact BS4 emission-system configuration should be confirmed by EPC/VIN. |
| BS3 or non-EVAP motorcycles | Do not assume | Purge valve is emission-system dependent and may not be present on earlier/non-EVAP setups. |
| J-Series 350 models | Do not assume | J-Series is a different platform; use the exact catalogue part number. |
| Fuel smell / running issue diagnosis | Diagnose before ordering | Symptoms can also be caused by hoses, canister, fuel cap venting, injector, throttle body, sensors or wiring. |
Not Compatible / Do Not Order For
- Classic 350 Reborn / J-Series unless exact catalogue confirms 591999/B
- Bullet 350 J-Series unless exact catalogue confirms 591999/B
- Meteor 350 or Hunter 350 unless exact catalogue confirms 591999/B
- Himalayan 411 / Scram 411 unless exact catalogue confirms 591999/B
- Himalayan 450 / Guerrilla 450
- Interceptor 650 / Continental GT 650
- Super Meteor 650, Shotgun 650, Bear 650 or Classic 650
- Customers looking for fuel pump, injector, throttle body, charcoal canister, hoses, clips or a full emission kit
Part Number / Supersession Notes
- User-searched number: 591999/B
- Base/search form: 591999
- Bike-Parts description: Purge Valve Assembly
- The Spares Company description: Purge Valve, part number 591999, fitment Bullet 350 ES - BSIV
- Search variants: 591999/B, 591999B, 591999-B, 591999
Similar Parts Comparison
| Part / Search Term | Description | Order When |
| 591999/B | Purge Valve Assembly | The EVAP purge valve is catalogue-confirmed or diagnosed faulty. |
| Charcoal canister | Fuel vapour storage canister | The canister itself is damaged/clogged, not the purge valve. |
| Vacuum / EVAP hose | Pipe connected to purge system | The hose is cracked, loose or missing. |
| Fuel pump / injector | Fuel delivery parts | Fuel supply fault is diagnosed, not EVAP purge-valve fault. |
| Throttle body / sensors | EFI air/fuel control parts | Idle/running issue is sensor or throttle-body related. |
Return-Prevention Note
Order this part only if the required part is 591999/B Purge Valve Assembly.
This is an EVAP/emission-system purge valve, not a fuel pump, injector, throttle body, charcoal canister, vacuum hose or full emission kit. Confirm exact BS4/UCE application and part number before ordering.
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Verify Fitment on Official Brand Portals
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Royal Enfield Official Spares Portal
Hero MotoCorp Official eCatalogue
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I thought it comes with holder , because you post the picture like that., but product was good