Royal Enfield Classic 350, Bullet 350, Electra & Thunderbird 350 E20 Carburettor Retrofit Kit – UCE 350 BS3 Black Sticker – KLT00006/A

Genuine Royal Enfield E20 Carburettor Retrofit Kit for Older UCE 350 BS3 Motorcycles

Own an older carburettor-equipped Royal Enfield Classic 350, Bullet 350, Electra 350 or Thunderbird 350? KLT00006/A is the Royal Enfield E20 Carb Kit – UCE 350 BS3, Black Sticker package, intended for the relevant BS3 Unit Construction Engine 350cc carburettor application. It combines the E20 carburettor kit reference with a specified fuel-tank label. Confirm your motorcycle’s VIN, emission generation and carburettor specification before ordering.

E20 denotes petrol blended with up to 20% ethanol. On older fuel systems not originally configured for such fuel, suitable retrofit components can help address material-compatibility concerns. This is a targeted parts kit, not a guaranteed cure for every starting, idling or fuel-delivery problem.

Exact Part Identification

OEM Component References

Package-content clarification: The references above identify the parts associated with the kit in the OEM breakdown. They do not establish the number of items sealed inside KLT00003/A, nor prove that a complete carburettor body, jets, specific hoses or other ancillary parts are included. Retail pack counts should be checked against the genuine package.

What This Kit Is — and What It Is Not

• A genuine Royal Enfield E20 retrofit kit reference for UCE 350 BS3 carburettor applications
• A black-sticker version identified by its complete kit number KLT00006/A
• Not automatically a complete carburettor assembly or BS29 carburettor replacement
• Not the BS4 E20 kit; BS4 has a separately identified kit reference
• Not an EFI conversion, fuel injector, ECU or kit for J-Series 350 engines

Model Compatibility — Check Emission Generation and VIN

Do not order solely by model name or registration year. Motorcycle specifications vary across generations and markets. Confirm BS3 emission compliance, carburettor configuration and the exact kit reference with the VIN or authorised Royal Enfield EPC before purchase.

Not Suitable For / Common Confusions

• New Classic 350 Reborn / J-Series 350, Meteor 350, Hunter 350, new Bullet 350 J-Series or Goan Classic 350
• BS4 versions when the applicable BS4 E20 conversion kit is specified
• Fuel-injected 350/500 motorcycles and any EFI-only application
• 500cc UCE motorcycles without separate verified part compatibility
• Any model where the EPC specifies another carburettor or retrofit kit

Black Sticker vs Silver Sticker — Choose the Correct SKU

The two complete kit numbers should not be substituted without confirming the required label specification. Sticker selection does not by itself establish motorcycle mechanical fitment or finish compatibility.

Why an E20 Retrofit May Be Relevant

Higher-ethanol petrol can affect ageing rubber and other fuel-contact components in legacy fuel systems. Royal Enfield E20 retrofit solutions for eligible older carburetted UCE motorcycles are intended to address compatibility concerns. Existing fuel leaks, contamination, worn carburettor parts and ignition faults still require individual inspection.

When Should You Consider Replacement?

• When the Royal Enfield workshop or EPC recommends the appropriate E20 retrofit for your specific BS3 UCE 350
• When checking a legacy carburettor fuel system for ethanol-related deterioration
• During a broader fuel-system inspection by a qualified technician — not as a substitute for diagnosis

Installation & Diagnostic Guidance

• Have a qualified Royal Enfield technician confirm the correct kit before installation
• Work in a safe, ventilated area with no flames or ignition sources; handle petrol carefully
• Inspect existing fuel hoses, carburettor interfaces, seals and fuel leaks as part of the job
• Follow the model-specific service manual; do not assume installation torque or tuning settings from another generation
• Check for fuel leaks, safe throttle return, stable idle and correct operation after fitting

What You Receive

One genuine Royal Enfield KLT00006/A E20 CARB KIT – UCE 350 BS3 BLACK STICKER. The supplied OEM breakdown lists component references KLT00003/A and RAK01666/B. Confirm their physical quantities and the internal sealed contents of KLT00003/A against the manufacturer packet before purchase.

Before Ordering — Avoid Wrong Selection

Check (1) the UCE 350 engine generation, (2) BS3 emission type, (3) whether your bike is carburettor-fed, (4) the exact EPC/VIN application, and (5) whether the black-sticker or silver-sticker package is required. A matching motorcycle name alone is not adequate evidence of fitment.

Frequently Asked Questions

Related Genuine Part Numbers to Check

• KLT00003/A — E20 carburettor kit for UCE 350 BS3, included as a referenced component
• RAK01666/B — fuel-tank label reference for this black-sticker kit
• KLT00007/A — separate UCE 350 BS3 E20 kit with silver-sticker label RAK01706/A
• KLT00002/A — separately listed E20 carburettor kit for UCE 350 BS4; not interchangeable by assumption

Customer Care & Claims

Please confirm the complete part number and motorcycle application before ordering. Under The Hood cannot accept cancellation once an order is processed as provided by store policy. Correctly supplied parts are generally not returnable for wrong part selection, diagnosis, mechanic recommendation, fitment mismatch or change of mind, subject to applicable consumer law. For wrong, missing or damaged items, retain a complete unboxing video and contact support within 24 hours of delivery. Refer to the current store policy for full terms.

Search Names & Product Identification

Royal Enfield E20 conversion kit BS3; E20 carburettor kit Classic 350 old model; UCE 350 ethanol petrol retrofit kit; Bullet 350 BS3 E20 kit; Electra 350 carb E20 kit; Thunderbird 350 UCE E20 conversion; Royal Enfield black sticker E20 kit; KLT00006/A; KLT00003/A; RAK01666/B.