Royal Enfield Suction Pipe (Air Filter to Resonator Hose) – Bullet 350 UCE / Classic 350 UCE | Part No. 143497/B (Replaces 143497/A)

If your Royal Enfield UCE 350 is showing unstable idling, minor backfiring, or a “rough running” feel after wash/rain or long storage, one common cause is an air leak from the airbox-to-resonator connection. The Royal Enfield Suction Pipe (Part No. 143497/B) is the OEM rubber hose used between the air filter box and resonator, designed to maintain an airtight intake path and keep dust/water from bypassing the filter. 

Unlike many aftermarket hoses that harden or crack early, an OEM-spec suction pipe maintains proper flexibility and sealing, which helps preserve correct air-fuel mixture, smoother throttle response, and long-term engine protection. Replace this pipe if you notice cracks, loose fitment, oil mist seepage, or hardened rubber—all of which can lead to unfiltered air ingestion and accelerated wear.

This listing is fitment-verified for UCE 350 models below only. If your bike is a J-Series (Reborn/Meteor/Hunter/Bullet J) or 650 Twins, do not order this unless you match the part number from your microfiche/BOM. 

Key Features 

• Genuine Royal Enfield suction pipe for intake/airbox sealing 

• Part No.: 143497/B (replacement for 143497/A) 

• Helps prevent unfiltered air leaks and dust entry (airbox-to-resonator path)

• Restores stable idle and consistent throttle feel (when leak is the cause)

• Direct-fit rubber profile for OEM-style clamping/fitment (model-dependent)

• Recommended replacement if rubber is cracked / hardened / loose

• Supports long-term engine safety by maintaining proper intake sealing

• Ideal for service intervals, intake overhauls, or air filter box work

Compatibility Table 

PLEASE CHECK PART NUMBER BEFORE PURCHASE 

Variants

• No variants (single piece suction pipe).

FAQs 

1) What exactly is this part used for?
It’s the suction pipe / rubber intake hose that connects the air filter box to the resonator, helping keep the intake path sealed and filtered. 

2) My bike is Classic 350 Reborn / Meteor 350 / Hunter 350—will it fit?
Not confirmed. Those are J-Series and use different intake/airbox layouts. Buy only if your official parts catalog shows 143497/B (or 143497/A) for your exact model/VIN.

3) What are the symptoms of a bad suction pipe?
Common signs: cracked/hardened rubber, loose fit at clamps, slight intake noise, unstable idle, hesitation, and dust traces near joints (symptoms can overlap with other issues).

4) Is 143497/A different from 143497/B?
143497/A is listed as the genuine part, and 143497/B is shown as the replacement part number. Order 143497/B for current supply. 

5) Can I install it myself?
Yes for most UCE setups—basic tools, loosen clamps, swap hose, ensure proper seating, and re-tighten. If the airbox boot is misaligned, have a mechanic seat the airbox correctly to prevent repeat leaks.