Royal Enfield Genuine Rear Brake Cam Kit (Rear Drum Brake Operating Cam) for Classic/Bullet/Electra/Thunderbird UCE – KAT00002/A (Drum Brake Only)

KAT00002/A is the genuine Rear Brake Cam Kit used inside the rear drum brake hub—this is the operating cam/camshaft that turns when you press the rear brake pedal, pushing the brake shoes outward. When the cam wears, rusts, or develops flat spots, riders typically feel a “sticky” pedal, uneven braking, brake drag, or weak bite even after changing brake shoes. Replacing the cam kit restores smooth brake actuation and consistent stopping feel—especially important on heavier UCE-era bikes that still run rear drum setups.

This is commonly searched as rear brake cam, rear drum brake camshaft, rear cam kit, brake operating cam, and “rear brake cam kit for Classic/Bullet”. OEM fit and finish matters here because the cam’s profile and tolerances directly affect braking smoothness and shoe contact.

Before you buy: This is for rear DRUM brake hubs only—confirm your rear wheel is drum type and match your old cam’s shape/spline with the product photo/part number.

Suggested internal links (collections): Royal Enfield UCE Brake Spares, Classic 350/500 UCE Spares, Bullet/Electra UCE Spares.

Key Features

• Genuine KAT00002/A rear drum brake operating cam kit (rear brake camshaft set).

• Restores smooth rear brake pedal feel; reduces sticking/drag caused by worn cam surfaces.

• Correct cam profile helps consistent shoe expansion and predictable braking bite.

• Best practice replacement during rear drum overhaul (shoes + springs + cam lubrication).

• Designed for rear drum brake hubs (not applicable to rear disc brake setups).

• Helps fix uneven braking, sudden grab, or delayed rear brake response.

• OEM-grade machining/tolerances for proper fit inside brake plate and hub assembly.

• Ideal for workshop maintenance on UCE platform bikes still using rear drum systems.

Compatibility Table 

Explicit exclusions (return-prevention): Not for rear disc brake bikes, not for J-Series (Classic Reborn/Bullet 350 J), not for Hunter 350, not for 650 Twins, not for Himalayan/Scram. (Rear drum brake hub required.)

Variants
No variants.

FAQs

Q1 (Fitment): How do I confirm KAT00002/A fits my bike?
Check 3 things: (1) your rear wheel is drum brake (not disc), (2) your old part is a rear brake operating cam/camshaft inside the drum brake plate, and (3) the cam’s spline/shape matches the product photo. If you share a photo of your old cam + brake plate, fitment can be confirmed before shipping.

Q2 (Fitment): Is this for all UCE 350/500/535 bikes?
Not automatically. Many UCE bikes came in different rear brake setups (drum vs disc depending on model/variant/year). This part is for rear drum brake hubs only. If your bike has a rear disc, it will not fit.

Q3 (Comparison): OEM vs aftermarket rear brake cam—what’s the difference?
The cam profile and machining tolerance directly affect how smoothly the shoes expand and how the pedal feels. Cheaper cams can create binding, uneven bite, or faster wear. OEM is recommended for consistent fit and brake feel. (Part number reference: KAT00002/A)

Q4 (Installation): Do I need any special tools?
Basic hand tools are enough, but you should also clean the brake plate and apply correct high-temp grease lightly on the cam pivot/contact areas. Inspect brake shoes and return springs—many workshops replace shoes/springs together during a drum overhaul.

Q5 (Symptoms): What problems does this fix?
Sticky rear brake pedal, brake drag after riding, uneven braking, weak rear brake bite even with new shoes, and a rough/notchy pedal feel caused by a worn or corroded cam surface.

Q6 (Returns-prevention): What should I send you to avoid ordering the wrong part?
Send (1) a clear photo of your rear wheel (showing drum vs disc), (2) a photo of the brake plate after removing the wheel, and (3) a photo of your existing brake cam/camshaft. If you have VIN/registration year, share that too.