Front Brake Shoe Return Spring (Drum Brake) for Royal Enfield Bullet UCE 350 / 500 EFI (7” Front Drum Hub Only) – 140374/B (Replaces 140374/C)

Sold As A Set Of 2 Piece 
Royal Enfield 140374/B is the genuine front brake shoe return spring used inside front drum brake (twin-lead/7” hub) assemblies—it pulls the brake shoes back after you release the lever, keeping the wheel free-rolling and preventing brake drag. If your front drum brake feels sticky, doesn’t return smoothly, or the wheel binds after braking, a tired or rusted return spring is a common cause.

This is an OEM-spec spring (factory-correct tension and hook shape), ideal when you’re servicing the drum—shoe replacement, cam/lever overhaul, or hub rebuild. Also searched as: “front brake shoe spring”, “brake return spring”, “ft br spring”, “shoe return spring 140374”.

Before you buy: this part is only for front DRUM brake hubs (internal shoes). If your motorcycle has a front disc brake (caliper + brake pads), this is not the correct part for the front wheel.

Note: Typically 2 springs are used per front drum (order quantity accordingly).

Key Features

• Genuine Royal Enfield part number 140374/B (front brake shoe return spring).

• Drum-brake specific: works with internal brake shoes (not disc/pads).

• Restores proper shoe return to reduce brake drag and overheating.

• Helps eliminate sticking brake lever feel caused by weak/aged springs.

• Correct hook geometry for OE-style drum brake shoe set-ups.

• Quantity guidance: commonly 2 springs per front drum assembly.

• Supersession: 140374/C → replaced by 140374/B.

Compatibility Table 

Variants
No variants.

FAQs 

Q1 (Fitment): How do I confirm this spring fits my bike?
Check your front wheel brake type: if the front wheel has a drum hub with internal brake shoes, this is the correct “shoe return spring.” If you have a front caliper and brake pads, do not order this for the front wheel.

Q2 (Fitment): My Bullet UCE has a front disc—will 140374/B work?
No for the front wheel. 140374/B is for front drum brake shoe systems (internal shoes). Disc systems use different hardware.

Q3 (Comparison): OEM vs aftermarket brake shoe springs—why choose genuine?
Aftermarket springs can vary in tension and hook geometry, which can cause dragging shoes or weak return. Genuine parts are designed for the OE drum assembly tolerance and return force.

Q4 (Supersession): Is 140374/C the same as 140374/B?
Yes—sources show 140374/C is replaced by 140374/B. Order 140374/B as the current part.

Q5 (Installation): Any precautions while installing drum brake return springs?
Use spring pliers or long-nose pliers, wear eye protection, and inspect shoes/cam for grooves. Replace springs in pairs if possible (many drums use 2 springs).

Q6 (Symptoms): What problems does a weak return spring cause?
Brake drag, wheel not spinning freely, overheating smell after riding, inconsistent lever feel, and premature shoe wear.

Q7 (Returns-prevention): What photo should I share to confirm before shipping?
Send a clear photo of your front hub + brake panel (or the old spring next to a scale). If the front brake is disc, share the caliper photo and we’ll guide you to the correct part.