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Royal Enfield Classic 350/500, Bullet 350/500 & Electra UCE Fuel Tank Cap with Keys 888377 BIG TANK
Royal Enfield Classic 350/500, Bullet 350/500 & Electra UCE Fuel Tank Cap with Keys 888377 BIG TANK
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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
Genuine Royal Enfield 888377 locking fuel tank cap assembly with keys for catalogue-matched UCE big-tank Royal Enfield motorcycles.
The Royal Enfield 888377 Fuel Tank Cap Assembly with Keys BVI FLI is a genuine replacement petrol tank cap / fuel tank lock assembly for compatible Royal Enfield UCE big-tank motorcycles.
It is commonly searched by buyers and mechanics as Classic 350 fuel tank cap, Classic 500 fuel cap with key, Bullet 350 petrol tank cap, Bullet 500 tank lock, Electra UCE fuel cap, petrol cap with keys, tank cap lock, or Royal Enfield 888377.
Use this part when the existing fuel tank cap is damaged, jammed, missing, loose, not locking properly, or when the key operation has failed. Always match the old cap style, tank filler neck, and part number before ordering.
What This Product Is
- Genuine Royal Enfield spare part.
- Part number: 888377.
- Factory description: Fuel Tank Cap Assembly with Keys BVI FLI.
- Locking fuel tank / petrol tank cap assembly.
- Supplied with keys as part of the genuine cap assembly.
- Used on compatible UCE big-tank Royal Enfield motorcycles where the catalogue specifies 888377.
- Replacement for worn, damaged, jammed, missing, or failed fuel tank cap assemblies.
What This Product Is Not
- Not a fuel tank.
- Not a complete common-key lock kit.
- Not an ignition switch assembly.
- Not a steering lock assembly.
- Not a side box / toolbox lock.
- Not a fuel pump, fuel filter, petrol tap, fuel sender unit, or fuel hose.
- Not a universal Royal Enfield fuel cap for all models.
- Not guaranteed to match the existing ignition key.
Key Features
- Original Royal Enfield part number 888377.
- Factory-listed as Fuel Tank Cap Assembly with Keys BVI FLI.
- Locking petrol tank cap supplied with keys.
- Helps restore tank closing, locking, and key operation.
- Useful when the old tank cap lock is jammed, broken, missing, or damaged.
- Strong fitment separation between UCE, J-Series, Thunderbird, Himalayan, and 650 models to reduce wrong orders.
- Correct replacement only when the old cap, tank filler neck, or parts catalogue confirms 888377.
Buyer Search Names / Internal Search Keywords
Royal Enfield 888377, 888377 fuel tank cap, fuel tank cap assembly with keys, petrol tank cap, fuel cap with key, fuel tank lock, tank lock with keys, locking petrol cap, locking gas cap, Classic 350 fuel tank cap, Classic 500 fuel cap, Bullet 350 petrol cap, Bullet 500 tank cap, Electra 350 UCE fuel cap, UCE big tank cap, BVI FLI fuel tank cap.
Confirmed Compatibility Table
| Brand | Model / Generation | Fitment Status | Important Note |
|---|---|---|---|
| Royal Enfield | Classic 350 UCE / pre-Reborn Classic 350 | Confirmed where 888377 is specified | For compatible big-tank fuel cap style only. Match old cap and filler neck. |
| Royal Enfield | Classic 500 EFI / Classic 500 UCE | Confirmed where 888377 is specified | Check old cap style and tank filler neck before ordering. |
| Royal Enfield | Bullet 350 UCE KS | Confirmed where 888377 is specified | For compatible UCE big-tank models. |
| Royal Enfield | Bullet 350 UCE ES | Confirmed where 888377 is specified | For compatible UCE big-tank models. |
| Royal Enfield | Electra 350 UCE ES | Confirmed where 888377 is specified | For compatible UCE big-tank models. |
| Royal Enfield | Bullet 500 EFI / B5 leanburn-EFI fuel tank applications | Use where exact parts catalogue / old cap confirms 888377 | Match cap style, filler neck, and old part number before ordering. |
The Classic/Bullet/Electra UCE model support is seller-catalogue supported by The Spares Company, while Hitchcock’s parts-book page supports use of the 888377 locking flip-type petrol cap in leanburn/EFI fuel tank applications.
Fitment Not Confirmed / Check Before Ordering Table
| Model / Situation | Status | Reason to Check |
|---|---|---|
| Bullet 500 EFI / B5 variants | Check before ordering | Confirm exact tank cap style, old cap, and catalogue reference. |
| BS4 / BS6 transition UCE variants | Check before ordering | Fuel cap style can vary by tank and model code. |
| Custom-painted or replaced fuel tanks | Check before ordering | Fitment depends on the actual filler neck, not only the motorcycle model name. |
| Aftermarket fuel tanks | Not confirmed | Use only after physically matching tank cap style and filler neck. |
| Common-key requirement | Check before ordering | This cap comes with its own keys and may not match ignition, steering lock, or toolbox key. |
| Imported / market-specific UCE variants | Check before ordering | Confirm through VIN-based catalogue or old part number before ordering. |
Not Compatible / Do Not Order For
| Model / Part Family | Caution |
|---|---|
| Classic 350 Reborn / J-Series | Do not order by “Classic 350” name only; Reborn/J-Series is a different generation. |
| New Bullet 350 J-Series | Different generation; not confirmed for 888377. |
| Meteor 350 | Different J-Series platform and tank/cap application. |
| Hunter 350 | Different J-Series platform and tank/cap application. |
| Himalayan 411 / Scram 411 | Different model family; not confirmed for this fuel cap. |
| Himalayan 450 / Guerrilla 450 | Different 450 platform; not confirmed. |
| Interceptor 650 / Continental GT 650 | Different 650 Twin platform; do not assume cap compatibility. |
| Continental GT 535 | Different model; verify exact catalogue if required. |
| Super Meteor 650 / Shotgun 650 / Bear 650 / Classic 650 | 650 family does not mean same tank cap. |
| Thunderbird / Thunderbird X | Many Thunderbird applications use different fuel cap styles; order only if exact catalogue confirms 888377. |
Part Number / Supersession Notes
- Confirmed part number: 888377.
- Factory description: Fuel Tank Cap Assembly with Keys BVI FLI.
- No later suffix was confirmed from the checked public sources.
- Do not interchange this with ignition switch, steering lock, toolbox lock, common-key set, or another fuel cap part number unless the parts catalogue confirms compatibility.
- Royal Enfield price-list data also shows nearby separate lock/fuel-cap references such as 888378 Steering Lock Assembly, 888379 Ignition Switch Assembly, and 888398 Fuel Tank Cap with Keys, so these should not be mixed with 888377.
Similar Parts Comparison
| Part / Search Term | Description | Order When |
|---|---|---|
| 888377 | Fuel Tank Cap Assembly with Keys BVI FLI | Required part is the compatible UCE big-tank fuel cap with keys. |
| 888378 | Steering Lock Assembly with Keys BVI-BU3 | Steering lock is required, not fuel tank cap. |
| 888379 | Ignition Switch Assembly with Keys BVI-B | Ignition switch is required, not fuel tank cap. |
| 888398 | Fuel Tank Cap with Keys | Different fuel cap reference; do not substitute without catalogue confirmation. |
| Complete lock set / common-key kit | Matched lock set depending on model and kit | Required only when buyer needs matching ignition, steering, cap, and/or toolbox keys. |
When Should This Be Replaced?
- Existing fuel tank cap is jammed.
- Key is lost or key operation has failed.
- Fuel cap is damaged, broken, loose, or missing.
- Cap is not locking or closing properly.
- Old cap has been damaged during fuel tank repair or repainting.
- Removed old cap or parts catalogue confirms 888377.
Recommended Related Parts to Check
- Fuel tank filler neck condition.
- Fuel tank mounting rubbers / tank dampers.
- Fuel tank mounting bolts.
- Ignition switch and steering lock only if a matching-key setup is required.
- Toolbox / side box lock only if the customer expects a common-key arrangement.
- Fuel tank breather and surrounding paint condition if the old cap was leaking or loose.
What’s in the Box
- 1 × Genuine Royal Enfield Fuel Tank Cap Assembly 888377
- Keys supplied with the cap assembly.
Fuel tank, ignition switch, steering lock, side box lock, complete common-key kit, fuel pump, fuel hose, petrol tap, sender unit, and mounting hardware are not included unless separately mentioned.
Installation Notes
- Match the old cap style and tank filler neck before fitting.
- Do not force-fit the cap on an unmatched fuel tank.
- Check lock/unlock operation before final use.
- For repainted tanks, custom tanks, or replacement tanks, verify physical cap fitment before ordering.
- Installation should be done by a trained mechanic if there is any doubt about cap alignment or tank filler-neck condition.
Return-Prevention Note
Order this part only if the required part is 888377 Fuel Tank Cap Assembly with Keys BVI FLI.
This is not a complete lock set and the supplied keys may not match the existing ignition, steering lock, or toolbox key. It is not for J-Series, Himalayan, 450, 650, or Thunderbird-style fuel cap applications unless the exact parts catalogue or old cap confirms 888377. Always match the old cap style, tank filler neck, and part number before ordering.
FAQs
What is Royal Enfield 888377?
888377 is a genuine Royal Enfield fuel tank cap assembly with keys, factory described as Fuel Tank Cap Assembly with Keys BVI FLI.
Does this fit Classic 350?
It fits Classic 350 UCE / pre-Reborn Classic 350 where the parts catalogue or old cap confirms 888377. It is not for Classic 350 Reborn / J-Series by default.
Does this fit Classic 500?
It fits Classic 500 EFI / UCE where the catalogue or old cap confirms 888377.
Does this fit Bullet 350 UCE?
Yes, it is listed for Bullet 350 UCE KS / ES where 888377 is specified.
Does this fit Electra 350 UCE?
Yes, it is listed for Electra 350 UCE ES where 888377 is specified.
Does this fit Bullet 500?
Use it for Bullet 500 EFI / B5 leanburn-EFI fuel tank applications only where the old cap, tank style, or exact parts catalogue confirms 888377.
Will the key match my existing ignition key?
No. This cap assembly comes with its own keys. It may not match the existing ignition switch, steering lock, or side box/toolbox key.
Is this a complete lock kit?
No. This is only the fuel tank cap assembly with keys. Ignition switch, steering lock, side box lock, and other locks are not included.
Does this fit Classic 350 Reborn or new Bullet 350 J-Series?
No. Do not order for J-Series models unless the exact parts catalogue confirms 888377.
Does this fit Thunderbird?
Do not order for Thunderbird unless the exact catalogue or old fuel cap confirms 888377. Many Thunderbird fuel cap applications use a different cap style.
Does this fit Interceptor 650 or Continental GT 650?
No confirmed fitment is listed here for 650 Twin models. Order only if a VIN-based catalogue confirms 888377.
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