Royal Enfield Steering Stem Washer 40×30×1 mm – Himalayan 450 & Guerrilla 450 – H8904018/A

Part Identification

Short Hook

Correct the steering-head/upper-yoke stack with the genuine 40×30×1 mm Royal Enfield washer specified for Himalayan 450 and Guerrilla 450.

Detailed Product Description

Genuine Royal Enfield steering stem / upper-yoke washer for the new Sherpa-platform Himalayan 450 and Guerrilla 450. Royal Enfield identifies this part as WASHER 40 x 30 x 1.0, Part No. H8904018/A.

This precision washer is used in the handlebar / steering-head assembly around the upper-yoke and steering-stem locking hardware. Its 40 mm outer diameter, 30 mm inner diameter and 1.0 mm thickness are important to maintaining the factory stack-up and correct seating of the steering assembly.

Key Features

• Genuine Royal Enfield replacement hardware.
• OEM Part Number: H8904018/A.
• Factory description: WASHER 40 x 30 x 1.0.
• Dimensions: 40 mm OD × 30 mm ID × 1.0 mm thickness.
• Used in the steering / upper-yoke / handlebar assembly.
• Direct replacement when the motorcycle EPC specifies H8904018 or H8904018/A.

Confirmed Compatibility

Important Fitment Note

Do not buy only by appearance or washer dimensions. Royal Enfield uses many similar-looking washers in different assemblies. Match H8904018/A with your existing part, EPC or VIN-based dealer lookup before ordering.

Not confirmed for: Himalayan 411, Scram 411, Scram 440, Classic 350, Bullet 350, Meteor 350, Hunter 350, Interceptor 650, Continental GT 650, Super Meteor 650, Shotgun 650, Classic 650 or other Royal Enfield models unless their EPC specifically calls for H8904018/A.

What’s in the Box

• 1 × Genuine Royal Enfield Washer 40 × 30 × 1.0 mm – H8904018/A

Installation Notes

• Install in the exact factory position and orientation shown in the motorcycle parts catalogue / workshop manual.
• Do not substitute a washer with a different thickness; steering-stack dimensions and clamping can be affected.
• Steering-head work is safety-critical. Installation should be performed by a competent technician and fasteners tightened to Royal Enfield specifications.

FAQs

Q. Is H8904018/A the same as H8904018?
Public parts catalogues commonly display the base code H8904018, while the current searchable genuine-parts price listing identifies the part as H8904018/A. Match the complete number on your supplied part or invoice where available.

Q. Does it fit the Himalayan 450?
Yes. The washer is shown in the Himalayan 450 handlebar / steering assembly alongside the steering-stem locking hardware.

Q. Does it fit the Guerrilla 450?
Yes. The Guerrilla 450 EPC lists H8904018 in its handlebar assembly, including the Smoke Silver and other colour/trim handlebar variants.

Q. Can I use a generic 40 × 30 × 1 mm washer?
For a steering assembly, the safest replacement is the specified OE part. Material, finish and dimensional tolerance can matter even when nominal dimensions look identical.

Order carefully: Please confirm part number, model, variant and fitment before purchase. Correctly supplied spare parts are not returnable due to wrong selection or fitment mismatch.

What This Product Is

• Genuine Royal Enfield OEM precision washer
• 40 mm OD × 30 mm ID × 1.0 mm nominal size
• Steering / upper-yoke / handlebar assembly component
• Confirmed on Himalayan 450 and Guerrilla 450 EPC applications

What This Product Is Not

• A generic hardware-store washer
• A headstock bearing
• A tabbed lock washer
• A wheel spacer or fork spacer

Buyer Search Names / Internal Search Keywords

Royal Enfield, Genuine Royal Enfield Parts, H8904018/A, H8904018A, H8904018, WASHER 40 x 30 x 1.0, Steering Stem / Upper Yoke Washer 40×30×1 mm, Himalayan 450, Guerrilla 450, Sherpa 450, Steering Stem Washer, Top Yoke Washer, Upper Yoke Washer, Handlebar Hardware, OEM Spares

Fitment Not Confirmed / Check Before Ordering

Not Compatible / Do Not Order For

Part Number / Supersession Notes

Keep the exact SKU H8904018/A in Shopify, MPN, stock label, purchase order and invoice. Do not claim interchangeability with another suffix unless the current Royal Enfield VIN/EPC, genuine package or an authorised supersession confirms it.

Similar Parts Comparison

When Should This Be Replaced?

Replace this part when the original component is damaged, worn, missing, incorrectly fitted, or when the current Royal Enfield workshop/EPC procedure specifies replacement. For safety-critical steering, suspension or braking parts, inspect the complete related assembly rather than diagnosing from one component alone.

Recommended Related Parts to Check

• Steering/headstock bearings
• Headstock spacers
• M30 locknuts and tabbed washer
• Upper-yoke / steering-stem hardware

Return-Prevention Note / Before You Buy

1. Match the complete part number H8904018/A, including suffix.
2. Confirm the motorcycle/application: Himalayan 450 and Guerrilla 450.
3. Compare the old part, current VIN/EPC and genuine packet before ordering.
4. Do not substitute a visually similar part, opposite side, different suffix or related component unless officially confirmed.
5. Confirm the required repair quantity; Shopify quantity 1 means one selling unit unless the genuine pack states otherwise.

Correctly supplied spare parts are not returnable or exchangeable because of incorrect selection, mechanic recommendation, fitment mismatch or change of mind. Orders cannot be cancelled once placed. Eligible wrong-item or damaged-item claims require applicable proof and a complete unboxing video under store policy.

SEO Tags

Royal Enfield, Genuine Royal Enfield Parts, H8904018/A, H8904018A, H8904018, WASHER 40 x 30 x 1.0, Steering Stem / Upper Yoke Washer 40×30×1 mm, Himalayan 450, Guerrilla 450, Sherpa 450, Steering Stem Washer, Top Yoke Washer, Upper Yoke Washer, Handlebar Hardware, OEM Spares

Image Filename Suggestions

• royal-enfield-h8904018-a-steering-stem-washer.jpg
• himalayan-450-guerrilla-450-upper-yoke-washer-h8904018-a.jpg

Image Alt Text

Genuine Royal Enfield H8904018/A Steering Stem / Upper Yoke Washer 40×30×1 mm for Himalayan 450 and Guerrilla 450

Google Shopping Notes

Competitor Gap Analysis

Typical catalogue and marketplace pages stop at the OEM part number and factory description. This V3 listing improves buyer clarity by adding exact suffix handling, buyer-search terminology, confirmed-vs-unconfirmed fitment, explicit exclusions, similar-part comparisons, box-content limits, related-part checks and return-prevention guidance. No additional model is added merely for SEO.

Research Log

SEO / CRO Self-Score

10 / 10 after V3 regeneration. Exact SKU handling, buyer-language SEO, conservative fitment, return-prevention and Shopify/Google Shopping fields have been normalized to the saved V3 standard.