{"product_id":"yamaha-nmax-125-150-starter-motor-54p-h1890-02-04","title":"Yamaha NMAX 125 150 Starter Motor 54P-H1890-02 54P-H1890-04","description":"\u003ch2\u003eYamaha NMAX 125 \/ NMAX 150 Starter Motor\u003c\/h2\u003e\n\u003cp\u003eYamaha starter motor assembly for selected first-generation NMAX 125 and NMAX 150 scooters using the 54P starter family. Yamaha 54P-H1890-02 has been superseded by 54P-H1890-04, making both numbers useful when checking the original part.\u003c\/p\u003e\n\u003ch3\u003eWhat Is Supplied\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 Yamaha electric starter motor assembly\u003c\/li\u003e\n\u003cli\u003e9-spline starter drive \/ output shaft\u003c\/li\u003e\n\u003cli\u003eCast aluminium drive-end housing with two mounting points\u003c\/li\u003e\n\u003cli\u003eStarter motor body and rear end housing\u003c\/li\u003e\n\u003cli\u003eInsulated electrical power terminal with retaining nut\u003c\/li\u003e\n\u003cli\u003eDrive-end sealing O-ring as fitted\/shown\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe starter relay\/solenoid, battery cables, separate starter gears and engine mounting bolts are not included unless clearly shown in the photographs.\u003c\/p\u003e\n\u003ch3\u003eSpecification\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: \u003cstrong\u003eUnbranded\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003ePart type: aftermarket starter motor assembly\u003c\/li\u003e\n\u003cli\u003eElectrical system: \u003cstrong\u003e12 V\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eDrive: \u003cstrong\u003e9-spline\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eApproximate drive diameter for cross-checking: \u003cstrong\u003e8.9 mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eApproximate exposed drive length for cross-checking: \u003cstrong\u003e24.6 mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eMounting: twin unthreaded mounting holes, approximately \u003cstrong\u003e6.8 mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e Unbranded aftermarket replacement. Yamaha names and OE numbers are used only to identify compatible applications and are not the manufacturer part number of the item supplied.\u003c\/p\u003e\n\u003ch3\u003eYamaha OE References\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e54P-H1890-02\u003c\/strong\u003e - original Yamaha starter motor assembly reference\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e54P-H1890-04\u003c\/strong\u003e - Yamaha superseding replacement for 54P-H1890-02\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatible OE \/ Interchange Reference Family\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eYamaha: \u003cstrong\u003eB7A-H1890-00\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eYamaha: \u003cstrong\u003eBW5-H1890-00\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eYamaha: \u003cstrong\u003e54S-H1890-03\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eYamaha: \u003cstrong\u003e2SB-H1800-10\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eManufacturer \/ Aftermarket Cross References\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWAI: \u003cstrong\u003e16068N\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eDirt Racing: \u003cstrong\u003e19-A1040\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eLester: \u003cstrong\u003e16068\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eValeo \/ interchange reference: \u003cstrong\u003eJYBX-004\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCross-reference numbers are provided to help identify equivalent starter specifications. This product is the Yamaha item shown and is not represented as being manufactured by the aftermarket brands listed above.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eYamaha GPD125 \/ NMAX 125 - selected 2015-2020 applications using 54P-H1890-02 \/ 54P-H1890-04\u003c\/li\u003e\n\u003cli\u003eYamaha GPD150 \/ NMAX 150 - selected 2017-2020 applications using the matching 54P starter family\u003c\/li\u003e\n\u003cli\u003eEarlier\/later or imported NMAX versions only where the original OE number and starter layout match\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eImportant Compatibility Check\u003c\/h3\u003e\n\u003cp\u003eYamaha used different starter motors across closely related model years and markets. Before ordering, compare the original part number and starter with the photographs. Check the 9-spline drive shaft, mounting-lug positions, electrical terminal location and overall housing shape. Matching Yamaha OE number 54P-H1890-02 or its confirmed supersession 54P-H1890-04 is the safest method of confirming fitment.\u003c\/p\u003e\n\n\u003ch3\u003eStarter Fault Checks\u003c\/h3\u003e\n\u003cp\u003eSlow cranking or a no-crank fault can also be caused by a weak battery, poor earth connection, corroded terminals, damaged wiring, a faulty starter relay\/solenoid or a fault in the starter-drive mechanism. Check the starting circuit before replacing the motor.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003eDisconnect the battery before removal or installation. Clean the mounting and electrical-contact areas, inspect the sealing O-ring and wiring, ensure the starter seats squarely in the crankcase and tighten all fasteners to Yamaha workshop specifications.\u003c\/p\u003e","brand":"Unbranded","offers":[{"title":"Default Title","offer_id":57391860121975,"sku":"01559-EIP","price":35.0,"currency_code":"SHP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0528\/8771\/6007\/files\/20260806_162438.jpg?v=1787060490","url":"https:\/\/www.motomaniauk.com\/products\/yamaha-nmax-125-150-starter-motor-54p-h1890-02-04","provider":"Moto Mania UK","version":"1.0","type":"link"}