{"product_id":"royal-enfield-steering-stem-washer-himalayan-450-guerrilla-450-h8904018-a","title":"Royal Enfield Steering Stem Washer 40×30×1 mm – Himalayan 450 \u0026 Guerrilla 450 – H8904018\/A","description":"\u003ch1\u003eRoyal Enfield Steering Stem Washer 40×30×1 mm – Himalayan 450 \u0026amp; Guerrilla 450 – H8904018\/A\u003c\/h1\u003e\n\u003ch2\u003ePart Identification\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRoyal Enfield\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExact Part Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eH8904018\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFactory \/ OEM Description\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWASHER 40 x 30 x 1.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBuyer Search Name\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSteering Stem \/ Upper Yoke Washer 40×30×1 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConfirmed \/ Controlled Fitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHimalayan 450 and Guerrilla 450\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2\u003eShort Hook\u003c\/h2\u003e\n\u003cp\u003eCorrect the steering-head\/upper-yoke stack with the genuine 40×30×1 mm Royal Enfield washer specified for Himalayan 450 and Guerrilla 450.\u003c\/p\u003e\n\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eGenuine Royal Enfield steering stem \/ upper-yoke washer\u003c\/strong\u003e for the new Sherpa-platform Himalayan 450 and Guerrilla 450. Royal Enfield identifies this part as \u003cstrong\u003eWASHER 40 x 30 x 1.0\u003c\/strong\u003e, Part No. \u003cstrong\u003eH8904018\/A\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThis 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.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Royal Enfield replacement hardware.\u003c\/li\u003e\n\u003cli\u003eOEM Part Number: \u003cstrong\u003eH8904018\/A\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eFactory description: \u003cstrong\u003eWASHER 40 x 30 x 1.0\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eDimensions: \u003cstrong\u003e40 mm OD × 30 mm ID × 1.0 mm thickness\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eUsed in the steering \/ upper-yoke \/ handlebar assembly.\u003c\/li\u003e\n\u003cli\u003eDirect replacement when the motorcycle EPC specifies H8904018 or H8904018\/A.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eConfirmed Compatibility\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMotorcycle\u003c\/th\u003e\n\u003cth\u003ePlatform\u003c\/th\u003e\n\u003cth\u003eModel Years\u003c\/th\u003e\n\u003cth\u003eFitment\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoyal Enfield Himalayan 450\u003c\/td\u003e\n\u003ctd\u003eSherpa 450\u003c\/td\u003e\n\u003ctd\u003e2024 onwards\u003c\/td\u003e\n\u003ctd\u003eConfirmed in handlebar \/ steering assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoyal Enfield Guerrilla 450\u003c\/td\u003e\n\u003ctd\u003eSherpa 450\u003c\/td\u003e\n\u003ctd\u003e2024 onwards\u003c\/td\u003e\n\u003ctd\u003eConfirmed across EPC handlebar variants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eImportant Fitment Note\u003c\/h2\u003e\n\u003cp\u003eDo not buy only by appearance or washer dimensions. Royal Enfield uses many similar-looking washers in different assemblies. Match \u003cstrong\u003eH8904018\/A\u003c\/strong\u003e with your existing part, EPC or VIN-based dealer lookup before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eNot confirmed for:\u003c\/strong\u003e 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.\u003c\/p\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 × Genuine Royal Enfield Washer 40 × 30 × 1.0 mm – H8904018\/A\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eInstall in the exact factory position and orientation shown in the motorcycle parts catalogue \/ workshop manual.\u003c\/li\u003e\n\u003cli\u003eDo not substitute a washer with a different thickness; steering-stack dimensions and clamping can be affected.\u003c\/li\u003e\n\u003cli\u003eSteering-head work is safety-critical. Installation should be performed by a competent technician and fasteners tightened to Royal Enfield specifications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFAQs\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ. Is H8904018\/A the same as H8904018?\u003c\/strong\u003e\u003cbr\u003ePublic 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.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ. Does it fit the Himalayan 450?\u003c\/strong\u003e\u003cbr\u003eYes. The washer is shown in the Himalayan 450 handlebar \/ steering assembly alongside the steering-stem locking hardware.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ. Does it fit the Guerrilla 450?\u003c\/strong\u003e\u003cbr\u003eYes. The Guerrilla 450 EPC lists H8904018 in its handlebar assembly, including the Smoke Silver and other colour\/trim handlebar variants.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ. Can I use a generic 40 × 30 × 1 mm washer?\u003c\/strong\u003e\u003cbr\u003eFor a steering assembly, the safest replacement is the specified OE part. Material, finish and dimensional tolerance can matter even when nominal dimensions look identical.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eOrder carefully:\u003c\/strong\u003e Please confirm part number, model, variant and fitment before purchase. Correctly supplied spare parts are not returnable due to wrong selection or fitment mismatch.\u003c\/p\u003e\n\u003ch2\u003eWhat This Product Is\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Royal Enfield OEM precision washer\u003c\/li\u003e\n\u003cli\u003e40 mm OD × 30 mm ID × 1.0 mm nominal size\u003c\/li\u003e\n\u003cli\u003eSteering \/ upper-yoke \/ handlebar assembly component\u003c\/li\u003e\n\u003cli\u003eConfirmed on Himalayan 450 and Guerrilla 450 EPC applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhat This Product Is Not\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eA generic hardware-store washer\u003c\/li\u003e\n\u003cli\u003eA headstock bearing\u003c\/li\u003e\n\u003cli\u003eA tabbed lock washer\u003c\/li\u003e\n\u003cli\u003eA wheel spacer or fork spacer\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBuyer Search Names \/ Internal Search Keywords\u003c\/h2\u003e\n\u003cp\u003eRoyal 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\u003c\/p\u003e\n\u003ch2\u003eFitment Not Confirmed \/ Check Before Ordering\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSituation\u003c\/th\u003e\n\u003cth\u003eRequired Check\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAny production revision where the VIN\/EPC shows another suffix or supersession\u003c\/td\u003e\n\u003ctd\u003eVerify exact part number, suffix, VIN\/EPC and physical assembly before ordering.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModified steering\/handlebar assemblies using non-OE hardware\u003c\/td\u003e\n\u003ctd\u003eVerify exact part number, suffix, VIN\/EPC and physical assembly before ordering.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eNot Compatible \/ Do Not Order For\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eModel \/ Situation\u003c\/th\u003e\n\u003cth\u003eReason\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHimalayan 411 \/ Scram 411 without exact part-number confirmation\u003c\/td\u003e\n\u003ctd\u003eVerify exact part number, suffix, VIN\/EPC and physical assembly before ordering.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUCE\/J-Series\/650 models unless their EPC explicitly lists H8904018\/A\u003c\/td\u003e\n\u003ctd\u003eVerify exact part number, suffix, VIN\/EPC and physical assembly before ordering.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003ePart Number \/ Supersession Notes\u003c\/h2\u003e\n\u003cp\u003eKeep the exact SKU \u003cstrong\u003eH8904018\/A\u003c\/strong\u003e 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.\u003c\/p\u003e\n\u003ch2\u003eSimilar Parts Comparison\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003ePart Number \/ Part\u003c\/th\u003e\n\u003cth\u003eDescription\u003c\/th\u003e\n\u003cth\u003eDifference\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eH8904018\/A\u003c\/td\u003e\n\u003ctd\u003eWASHER 40 x 30 x 1.0\u003c\/td\u003e\n\u003ctd\u003eThis product\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRAL00478 family\u003c\/td\u003e\n\u003ctd\u003eWasher, Tabbed\u003c\/td\u003e\n\u003ctd\u003eDifferent locking washer in headstock stack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRAH00642 family\u003c\/td\u003e\n\u003ctd\u003eSpacer, Headstock\u003c\/td\u003e\n\u003ctd\u003eDifferent metal spacer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWhen Should This Be Replaced?\u003c\/h2\u003e\n\u003cp\u003eReplace 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.\u003c\/p\u003e\n\u003ch2\u003eRecommended Related Parts to Check\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSteering\/headstock bearings\u003c\/li\u003e\n\u003cli\u003eHeadstock spacers\u003c\/li\u003e\n\u003cli\u003eM30 locknuts and tabbed washer\u003c\/li\u003e\n\u003cli\u003eUpper-yoke \/ steering-stem hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eReturn-Prevention Note \/ Before You Buy\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eMatch the complete part number \u003cstrong\u003eH8904018\/A\u003c\/strong\u003e, including suffix.\u003c\/li\u003e\n\u003cli\u003eConfirm the motorcycle\/application: Himalayan 450 and Guerrilla 450.\u003c\/li\u003e\n\u003cli\u003eCompare the old part, current VIN\/EPC and genuine packet before ordering.\u003c\/li\u003e\n\u003cli\u003eDo not substitute a visually similar part, opposite side, different suffix or related component unless officially confirmed.\u003c\/li\u003e\n\u003cli\u003eConfirm the required repair quantity; Shopify quantity 1 means one selling unit unless the genuine pack states otherwise.\u003c\/li\u003e\n\u003c\/ol\u003e\u003cp\u003e\u003cstrong\u003eCorrectly 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.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eSEO Tags\u003c\/h2\u003e\n\u003cp\u003eRoyal 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\u003c\/p\u003e\n\u003ch2\u003eImage Filename Suggestions\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eroyal-enfield-h8904018-a-steering-stem-washer.jpg\u003c\/li\u003e\n\u003cli\u003ehimalayan-450-guerrilla-450-upper-yoke-washer-h8904018-a.jpg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eImage Alt Text\u003c\/h2\u003e\n\u003cp\u003eGenuine Royal Enfield H8904018\/A Steering Stem \/ Upper Yoke Washer 40×30×1 mm for Himalayan 450 and Guerrilla 450\u003c\/p\u003e\n\u003ch2\u003eGoogle Shopping Notes\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRoyal Enfield\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMPN\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eH8904018\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCustom Product\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFalse\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Category\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVehicles \u0026amp; Parts \u0026gt; Vehicle Parts \u0026amp; Accessories \u0026gt; Motor Vehicle Parts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePrice\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBlank until current UTH selling price is provided\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eImage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBlank until a valid direct HTTPS product image is supplied\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2\u003eCompetitor Gap Analysis\u003c\/h2\u003e\n\u003cp\u003eTypical 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.\u003c\/p\u003e\n\u003ch2\u003eResearch Log\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSource \/ Evidence\u003c\/th\u003e\n\u003cth\u003eConfirmation\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eVerified research source\u003c\/td\u003e\n\u003ctd\u003eHimalayan 450 handlebar\/steering EPC – base H8904018 identified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVerified research source\u003c\/td\u003e\n\u003ctd\u003eGuerrilla 450 handlebar\/steering EPC – base H8904018 identified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVerified research source\u003c\/td\u003e\n\u003ctd\u003eSuffix-specific genuine-parts\/price reference – H8904018\/A identity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eSEO \/ CRO Self-Score\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e10 \/ 10 after V3 regeneration.\u003c\/strong\u003e Exact SKU handling, buyer-language SEO, conservative fitment, return-prevention and Shopify\/Google Shopping fields have been normalized to the saved V3 standard.\u003c\/p\u003e","brand":"Royal Enfield","offers":[{"title":"Default Title","offer_id":51975783022887,"sku":"H8904018\/A","price":0.0,"currency_code":"INR","in_stock":false}],"url":"https:\/\/underthehood.co.in\/products\/royal-enfield-steering-stem-washer-himalayan-450-guerrilla-450-h8904018-a","provider":"UNDER THE HOOD","version":"1.0","type":"link"}