Royal Enfield 146797 / 146797/A – Front Mudguard Extension (Plastic, Black) for Classic 350/500 UCE, Bullet 350/500, Electra 350 UCE & Thunderbird 350/500

Royal Enfield part 146797 / 146797/A is the genuine front mudguard extension (plastic) used across multiple UCE and earlier Thunderbird/Electra models. Official Royal Enfield price lists and retired-model catalogues list 146797/A as “MUDGUARD EXTENSION”, often paired with front mudguard assemblies and earlier part 521069/B (Front Mudguard Extension).

The Thunderbird 350/500 parts catalogue and TBTS front mudguard pages show 146797/A – Mudguard Extension – Plastic, served in front-mudguard extension kit (888116), confirming its OE use on Thunderbird/TBTS models. The UCE parts catalogue references the same “Mudguard Extension – Plastic” in the front mudguard assemblies shared between Electra 350 UCE (ES), Classic 350, and Classic 500 EFI, tying this part into the broader UCE family.

Thunderbird 350/500, Electra 350 UCE (ES), Classic 350/500 UCE and Bullet 350/500, often describing it as front mudguard extension for TBTS / Electra / Classic / Bullet.

Functionally, this extension mounts at the lower edge of the front mudguard, lengthening the guard to reduce mud, slush and water spray onto the engine, frame and rider – very useful for Indian monsoons and rough-road use. Being an OEM plastic part, it follows the mudguard contour, looks factory-correct, and avoids the rattles and poor fitment common with cheap local flaps.

If your bike is within the compatibility table, 146797/A is the correct, factory-spec replacement to restore both protection and original appearance.

Key Features 

• Genuine Royal Enfield OEM part – Part No. 146797 / 146797/A, officially described as “MUDGUARD EXTENSION” in RE price lists and TBTS/UCE catalogues.

• Front mudguard extension – plastic – Extends the front mudguard to reduce tyre spray on the engine, frame and rider; TBTS catalogue explicitly labels it as “Mudguard Extension – Plastic”.

• Confirmed multi-model fitment – Used on Thunderbird 350/500 & TBTS, Electra 350 UCE (ES), Classic 350/500 UCE and Bullet 350/500 as per TBTS/UCE microfiche, retired model catalogues and dealer assignments.

• Direct OEM replacement for 521069/B in many kits – Retired-model catalogue maps 146797/A to earlier 521069/B Front Mudguard Extension, confirming its role as updated service part.

• Improved protection in rain & off-road – Helps keep slush off the engine, down-tube, exhaust and rider’s legs; ideal for touring and bad-road use.

• Factory-correct fit & look – Follows mudguard curve, no cutting/drilling when used on listed models; visually matches OE finish.

• Durable plastic, designed for wash & weather – Dealer descriptions note powder-coated / durable finish and car-wash-safe mounting when properly fixed.

• Served in front mudguard extension kits – Appears as a sub-part in kit 888116 – Front Mudguard Extension & Clip Kit (TBTS), making this ideal for individual replacement.

Compatibility Table 

Based on TBTS & Thunderbird 500/350 microfiche, UCE parts catalogue, retired-model price lists and at least two dealer sources.

How confirmed?

• Thunderbird 350/500 TBTS – TB 500/350 parts catalogue and TBTS front mudguard pages list 146797/A Mudguard Extension – Plastic, served in kit A1 / 888116.

• Electra 350 UCE, Classic 350/500 UCE – UCE catalogue shows a shared front mudguard assembly with row “Mudguard Extension – Plastic” in the same section as Classic 350 & Classic 500 EFI; retired-model catalogue and dealer mappings tie that extension to 146797/A and 521069/B.

• Bullet 350/500 UCE – Retired parts catalogue and multiple OE-number dealers (care2spare, eBay OEM listings) list 146797/A Mudguard Extension as genuine fitment for Bullet 350/500 & Classic 500, confirming shared front mudguard extension hardware.

Variants

This part is a single physical design, typically in black plastic:

• Variant: 146797 / 146797/A – Front Mudguard Extension (Plastic)

• Colour/Finish: Black OE-style plastic (often supplied plain; can be painted if required)

• Mounting: Bolts/clips to lower front mudguard (fasteners may be part of separate kit, e.g. 888116 – Front Mudguard Extension & Clip Kit TBTS).

FAQs

Q1. What exactly does part 146797 / 146797/A do?
It is the front mudguard extension (plastic) for multiple Royal Enfield UCE and Thunderbird/Electra models. It extends the front mudguard downward to control mud and water spray. TBTS and Thunderbird parts catalogues list it clearly as “Mudguard Extension – Plastic”.

Q2. Will this fit my Classic 350 or Classic 500 UCE?
PLEASE CHECK PHOTO AND PART NUMBE BEFORE PURCHASE 

Q3. Is this part genuine Royal Enfield or aftermarket?
On underthehood.co.in, this listing is for a 100% genuine Royal Enfield OEM part. Official price lists and bike-parts-royalenfield list 146797/A – MUDGUARD EXTENSION 

Q4. Do I need any clips or bolts to install it?
Yes – the extension normally uses small M6 bolts, washers and nyloc nuts, sometimes packaged in a kit like 888116 – Front Mudguard Extension & Clip Kit TBTS. If your old hardware is rusty or missing, consider ordering new fixings along with the extension.

Q5. How can I be sure it fits my bike before ordering?
Check:

1. Your bike model and engine type match those in the confirmed table.

2. Your original RE packet or microfiche shows 146797 or 146797/A for the front mudguard extension.
   If you ride a variant listed under ❓, we recommend confirming with the official RE spares portal using your VIN or contacting us with your RC/VIN before purchasing.