{"id":50561,"date":"2024-05-31T14:26:24","date_gmt":"2024-05-31T12:26:24","guid":{"rendered":"https:\/\/www.vmx-service.eu\/product\/yz125-250-1988-1993-wr250z-1991-1993\/"},"modified":"2025-08-12T14:24:35","modified_gmt":"2025-08-12T12:24:35","slug":"yz125-250-1988-1993-wr250z-1991-1993","status":"publish","type":"product","link":"https:\/\/www.vmx-service.eu\/de\/produkt\/yz125-250-1988-1993-wr250z-1991-1993\/","title":{"rendered":"YZ125-250, 1988-1993  WR250Z 1991-1993"},"content":{"rendered":"<p>Englischer sprache!<\/p>\n<p>Ausfuhrige beschreibung von wartung und reparaturen f\u00fcr folgende modelle:<\/p>\n<p>YZ125 1988-1993<\/p>\n<p>YZ250 1988-1993<\/p>\n<p>WR250Z 1991-1993<\/p>\n<p>&nbsp;<\/p>\n<p>QUICK REFERENCE DATA CHAPTER ONE \/ GENERAL INFORMATION Manual organization \/ Notes, cautions and warnings \/ Safety first \/ Service hints \/ Washing the bike \/ Torque specifications \/ Fasteners \/ Lubricants \/ RTV gasket sealant \/ Threadlock \/ Parts replacement \/ Optional parts \/ Basic hand tools \/ Precision measuring tools \/ Special tools \/ Fabricating tools \/ Mechanic&#8217;s tips \/ Ball bearing replacement \/ Oil seals \/ Safety \/ Specifications CHAPTER TWO \/ TROUBLESHOOTING Operating requirements\/ Troubleshooting instruments \/ Starting the engine \/ Starting difficulties \/ Engine starting troubles \/ Engine performance \/ Engine \/ Engine noises \/ Two-stroke pressure testing \/ Fuel system \/ Ignition system \/ Clutch \/ Transmission \/ Drive train noise \/ Front suspension and steering \/ Rear suspension \/ Frame noise \/ Brakes \/ Specifications CHAPTER THREE \/ LUBRICATION, MAINTENANCE AND TUNE-UP Pre-ride checklist \/ Maintenance schedule \/ Tires and wheels \/ Lubricants \/ Cleaning solvent \/ Engine lubrication \/ Periodic lubrication \/ Transmission oil level check and change \/ Front fork oil change and oil level adjustment \/ Drive chain lubrication \/ Swing arm bearing assembly lubrication \/ Relay arm and connecting rod lubrication \/ Kickstarter spline lubrication \/ Front fork dust and oil seal cleaning and lubrication (1989-on) \/ Periodic maintenance \/ Drive chain cleaning and adjustment \/ Clutch adjustment \/ Throttle cable adjustment \/ Air filter service \/ Fuel valve cleaning \/ Sprocket bolt tightness \/ Coolant change \/ Engine tune-up \/ Cylinder head nuts torque \/ Spark plug \/ Ignition timing (CDI) \/ Carburetor idle speed adjustment \/ Idle speed and mixture adjustment \/ Carbon removal \/ Storage \/ SpecificationsCHAPTER FOUR \/ ENGINE TOP END Engine principles \/ Engine lubrication \/ Cleanliness \/ Servicing engine in frame \/ Cylinder head \/ Cylinder and power valve \/ Piston, wrist pin and piston rings \/ Reed valve assembly \/ Engine break-in \/ SpecificationsCHAPTER FIVE \/ ENGINE LOWER END Servicing engine in frame \/ Engine \/ Engine sprocket \/ Countershaft oil seal replacement \/ Crankcase and crankshaft \/ SpecificationsCHAPTER SIX \/ CLUTCH \/ KICKSTARTER AND EXTERNAL SHIFT MECHANISM Right-hand crankcase cover \/ Clutch cover \/ Clutch release mechanism \/ Clutch release arm \/ Exhaust governor assembly \/ Clutch \/ Clutch service \/ Clutch inspection \/ Primary drive pinion gear \/ Clutch cable \/ Kickstarter and idler gear \/ External shift mechanism \/ SpecificationsCHAPTER SEVEN \/ TRANSMISSION AND INTERNAL SHIFT MECHANISM Transmission operation \/ Transmission troubleshooting \/ Transmission \/ Transmission overhaul \/ Transmission inspection \/ Internal shift mechanism \/ SpecificationsCHAPTER EIGHT \/ FUEL AND EXHAUST SYSTEMS Air filter \/ Carburetor operation \/ Carburetor service \/ Carburetor cleaning and inspection \/ Carburetor float height adjustment \/ Carburetor rejetting \/ Fuel tank \/ Fuel shutoff valve \/ Exhaust system \/ Exhaust system repair \/ SpecificationsCHAPTER NINE \/ IGNITION SYSTEM Component testing \/ Capacitor discharge ignition \/ Flywheel rotor \/ CDI unit \/ Ignition coil \/ Spark plug \/ Engine stop switch \/ Wiring diagrams \/ SpecificationsCHAPTER TEN \/ LIQUID COOLING SYSTEM Safety precautions \/ Cooling system inspection \/ Radiator \/ Water pump \/ Hoses \/ SpecificationsCHAPTER ELEVEN \/ FRONT SUSPENSION AND STEERING Front wheel \/ Front hub \/ Rim and spoke service \/ Tire changing \/ Tire repairs \/ Handlebar \/ Steering head \/ Front fork \/ SpecificationsCHAPTER TWELVE \/ REAR SUSPENSION Rear wheel \/ Rear hub \/ Driven sprocket \/ Drive chain \/ Tire changing and tire repairs \/ Shock absorber \/ Rear swing arm and linkage \/ Swing arm side clearance \/ Bearing \/ Sub-frame and back stay \/ SpecificationsCHAPTER THIRTEEN \/ BRAKES Disc brake \/ Front brake pad \/ Front caliper \/ Front master cylinder \/ Rear brake pad \/ Rear brake caliper \/ Rear master cylinder \/ Brake hose \/ Brake disc \/ Brake bleeding \/ SpecificationsINDEX WIRING DIAGRAMS Models covered: 1991 1992 1993 Yamaha WR250Z WR 250Z 250 Z 1988 1989 1990 1991 1992 1993 Yamaha YZ125 YZ 125 1988 1989 1990 1991 1992 1993 Yamaha YZ250 YZ 250 1989 1990 Yamaha YZ250WR YZ 250WR 250 WR<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Englischer sprache! Ausfuhrige beschreibung von wartung und reparaturen f\u00fcr folgende modelle: YZ125 1988-1993 YZ250 1988-1993 WR250Z 1991-1993 &nbsp; QUICK REFERENCE DATA CHAPTER ONE \/ GENERAL INFORMATION Manual organization \/ Notes, cautions and warnings \/ Safety first \/ Service hints \/ Washing the bike \/ Torque specifications \/ Fasteners \/ Lubricants \/ RTV gasket sealant \/&hellip;<\/p>\n","protected":false},"featured_media":36955,"template":"","meta":[],"product_brand":[],"product_cat":[3599,2198],"product_tag":[],"class_list":{"0":"post-50561","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-handbucher-de-3","7":"product_cat-yamaha-de","8":"entry","9":"has-media","11":"first","12":"instock","13":"taxable","14":"shipping-taxable","15":"purchasable","16":"product-type-simple"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>YZ125-250, 1988-1993 WR250Z 1991-1993 - VMX Service<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.vmx-service.eu\/de\/produkt\/yz125-250-1988-1993-wr250z-1991-1993\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"YZ125-250, 1988-1993 WR250Z 1991-1993 - VMX Service\" \/>\n<meta property=\"og:description\" content=\"Englischer sprache! Ausfuhrige beschreibung von wartung und reparaturen f\u00fcr folgende modelle: YZ125 1988-1993 YZ250 1988-1993 WR250Z 1991-1993 &nbsp; QUICK REFERENCE DATA CHAPTER ONE \/ GENERAL INFORMATION Manual organization \/ Notes, cautions and warnings \/ Safety first \/ Service hints \/ Washing the bike \/ Torque specifications \/ Fasteners \/ Lubricants \/ RTV gasket sealant \/&hellip;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.vmx-service.eu\/de\/produkt\/yz125-250-1988-1993-wr250z-1991-1993\/\" \/>\n<meta property=\"og:site_name\" content=\"VMX Service\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-12T12:24:35+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.vmx-service.eu\/wp-content\/uploads\/2024\/05\/yz125-250-1988-1993-wr250z-1991-1993.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"264\" \/>\n\t<meta property=\"og:image:height\" content=\"264\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Gesch\u00e4tzte Lesezeit\" \/>\n\t<meta name=\"twitter:data1\" content=\"3\u00a0Minuten\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.vmx-service.eu\/de\/produkt\/yz125-250-1988-1993-wr250z-1991-1993\/\",\"url\":\"https:\/\/www.vmx-service.eu\/de\/produkt\/yz125-250-1988-1993-wr250z-1991-1993\/\",\"name\":\"YZ125-250, 1988-1993 WR250Z 1991-1993 - VMX Service\",\"isPartOf\":{\"@id\":\"https:\/\/www.vmx-service.eu\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.vmx-service.eu\/de\/produkt\/yz125-250-1988-1993-wr250z-1991-1993\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.vmx-service.eu\/de\/produkt\/yz125-250-1988-1993-wr250z-1991-1993\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.vmx-service.eu\/wp-content\/uploads\/2024\/05\/yz125-250-1988-1993-wr250z-1991-1993.jpg\",\"datePublished\":\"2024-05-31T12:26:24+00:00\",\"dateModified\":\"2025-08-12T12:24:35+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.vmx-service.eu\/de\/produkt\/yz125-250-1988-1993-wr250z-1991-1993\/#breadcrumb\"},\"inLanguage\":\"de\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.vmx-service.eu\/de\/produkt\/yz125-250-1988-1993-wr250z-1991-1993\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"de\",\"@id\":\"https:\/\/www.vmx-service.eu\/de\/produkt\/yz125-250-1988-1993-wr250z-1991-1993\/#primaryimage\",\"url\":\"https:\/\/www.vmx-service.eu\/wp-content\/uploads\/2024\/05\/yz125-250-1988-1993-wr250z-1991-1993.jpg\",\"contentUrl\":\"https:\/\/www.vmx-service.eu\/wp-content\/uploads\/2024\/05\/yz125-250-1988-1993-wr250z-1991-1993.jpg\",\"width\":264,\"height\":264},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.vmx-service.eu\/de\/produkt\/yz125-250-1988-1993-wr250z-1991-1993\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.vmx-service.eu\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Shop\",\"item\":\"https:\/\/www.vmx-service.eu\/de\/shop\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"YZ125-250, 1988-1993 WR250Z 1991-1993\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.vmx-service.eu\/#website\",\"url\":\"https:\/\/www.vmx-service.eu\/\",\"name\":\"VMX Service\",\"description\":\"Vintage MX Parts\",\"publisher\":{\"@id\":\"https:\/\/www.vmx-service.eu\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.vmx-service.eu\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"de\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.vmx-service.eu\/#organization\",\"name\":\"VMX Service\",\"url\":\"https:\/\/www.vmx-service.eu\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"de\",\"@id\":\"https:\/\/www.vmx-service.eu\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.vmx-service.eu\/wp-content\/uploads\/2025\/01\/VMX-logo.png\",\"contentUrl\":\"https:\/\/www.vmx-service.eu\/wp-content\/uploads\/2025\/01\/VMX-logo.png\",\"width\":278,\"height\":172,\"caption\":\"VMX Service\"},\"image\":{\"@id\":\"https:\/\/www.vmx-service.eu\/#\/schema\/logo\/image\/\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"YZ125-250, 1988-1993 WR250Z 1991-1993 - VMX Service","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.vmx-service.eu\/de\/produkt\/yz125-250-1988-1993-wr250z-1991-1993\/","og_locale":"de_DE","og_type":"article","og_title":"YZ125-250, 1988-1993 WR250Z 1991-1993 - VMX Service","og_description":"Englischer sprache! 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