573964/A – Clip, Breather / Small Service Clip for Classic 350 & Classic 500 UCE, Bullet 350/500 UCE, Electra 350 UCE (ES), Thunderbird 350/500 (UCE), Continental GT 535, Himalayan 411 (SAP/PAI hoses) – Genuine Royal Enfield

The genuine Royal Enfield 573964/A – CLIP is the small OE hose/line clip used right through the older UCE range to secure breather / pulse air / SAP / small crankcase or airbox hoses. In RE fiches it’s literally named “CLIP” or “CLIP BREATHER PIPE” and sits in the same group as the air-filter box, induction and anti-pollution (PAI) parts. Because it’s OEM, the diameter, spring tension and plastic profile are exactly right for the thin RE breather tubes — it grips firmly without cutting the hose, and it fits the boss/tab where the factory intended. 

We found it listed for a wide set of UCE bikes: TBTS/Thunderbird 350-500, Bullet 350/500 UCE (KS/ES), Electra 350 UCE, Classic 350/500 EFI, and even the Classic/Bullet Euro-4 and Himalayan PAI layouts where the same style clip holds the pollution/vent pipe. So this is the one to order when you’ve lost a clip during service, changed a hose, or are restoring a bike to 100% factory routing. Supplied per piece — check your fiche for quantity. 

Key Features

• Genuine OE RE clip – Part 573964/A. 

• Sized for RE breather / SAP / small vacuum hoses.

• Correct tension so it holds but doesn’t crush the hose.

• Matches OE routing tabs on Classic/Bullet/Thunderbird airbox & PAI assemblies.

• Ideal after hose replacement, detailing, or Euro-4 de-rustoration.

• Supplied per piece

Compatibility Table (confirmed from multiple listings)

Because this is a generic small clip, RE uses it across several models. If your fiche line says exactly 573964/A, this is the right one.

Variants / Related

• Other small clips in the same area: 592656/A (hose clip 350 cc), 

FAQs

Q1. What hose does this actually hold?
On most UCEs: the breather / PAI / induction small hose on or near the airbox or crankcase. On Euro-4/Himalayan: one of the SAP/anti-pollution lines. Match to your diagram.

Q2. Is it sold in pairs?
No, per piece. Your diagram will usually call for 1–3.

Q3. Can I use a hardware-store clamp instead?
You can, but generic clamps can cut the hose or look non-OE. This keeps the bike factory correct.

Q4. Will it fit new J-series (Classic Reborn/Meteor/Hunter)?
Not listed — J-series uses a different hose-clip family. Order only if your J-bike fiche says 573964/A.