Royal Enfield E20 Carburettor Upgrade Kit for UCE 350 BS4 Carb Bikes (Black Tank Sticker Included) – KLT00004/A

Royal Enfield KLT00004/A is a genuine E20 fuel-compatibility carburettor upgrade kit intended for UCE 350 BS4 carburettor motorcycles that still run the “old carb” setup. As ethanol-blended petrol increases, non-updated carb internals and seals can lead to rough idle, hard starting, hesitation, and inconsistent fueling—especially after storage. This OEM kit is the factory-style solution to update the carburettor’s consumables/calibration parts for better compatibility with E20 fuel.

This SKU is supplied as a set and includes a fuel tank E20 label (black sticker) as part of the kit (as per the genuine label on the pack shared). It is commonly searched as “E20 kit for Classic 350 BS4 carb”, “E20 carb kit UCE 350”, “ethanol conversion kit Royal Enfield carb”, and “E20 jet kit for BS4 RE”.

Before you buy: confirm your bike is UCE 350 BS4 + carburettor (not EFI) and match by VIN/RC + carb model photo to avoid wrong orders.

Key Features 

• Genuine Royal Enfield kit: Part No. KLT00004/A (set pack)

• Intended for UCE 350 BS4 carburettor platform (not for EFI / not for J-Series)

• Helps address E20-related issues: hard start, unstable idle, hesitation, lean/rich behavior

• Includes E20 fuel tank label (black sticker) inside the set (per pack label)

• OEM-grade seals/consumables approach (reduces leakage/swelling risk vs local rebuild parts)

• Best for: preventive upgrade, carb overhaul jobs, touring bikes using mixed fuel stations

• Supports return-prevention via VIN + carb photo verification before dispatch

• Workshop-friendly: install during carb service/cleaning with standard carb tools

Compatibility Table

Variants
TO BUY E20 BS3 CARBURETOR CLICK HERE

TO BUY E20 BS4 CARBURETOR CLICK HERE

TO BUY E20 BS3 CARBURETOR KIT CLICK HERE

FAQs 

Q1 (Fitment): How do I confirm KLT00004/A will fit my bike?
Confirm UCE 350 + BS4 + carburettor (not EFI). Share a photo of your carburettor area and your RC/VIN details; match the carb model and connector/cable routing before ordering.

Q2 (Fitment): Will this work on Classic 350 Reborn / Meteor 350 / Hunter 350?
No. Those are J-Series fuel-injected platforms; this kit is meant for UCE 350 BS4 carb bikes only.

Q3 (Comparison): Is this better than local jetting/aftermarket “E20 jet kit”?
Yes for reliability—OEM kits are designed as a packaged solution for compatibility and durability. Community discussions also describe the official kits as including specific carb consumables like jets/gaskets/choke parts rather than random tuning parts.

Q4 (Installation): Can I install it myself?
Recommended via a mechanic/carb technician. You’ll typically need carb removal, cleaning, careful replacement of kit components, and correct idle/mixture setting.

Q5 (Symptoms): What problems can this solve?
Common triggers include poor idling, stalling when throttle is released, hard cold starts, and inconsistent fueling after ethanol-rich fuel exposure—especially when the carb is old/worn.

Q6 (Returns-prevention): What should I send you to avoid ordering wrong?
Send (1) VIN/RC, (2) clear carb photo (left side), and (3) whether your bike is carb or EFI. If anything doesn’t match, order should be held until confirmed.