{"id":69758,"date":"2026-06-06T05:45:39","date_gmt":"2026-06-06T03:45:39","guid":{"rendered":"https:\/\/stage6-racing.com\/produkt\/crankshaft-bearing-set-stage6-r-t-c4-polymer-cage-mbk-booster\/"},"modified":"2026-06-11T06:18:30","modified_gmt":"2026-06-11T04:18:30","slug":"crankshaft-bearing-set-stage6-r-t-c4-polymer-minarelli-vertical","status":"publish","type":"product","link":"https:\/\/stage6-racing.com\/en\/product\/crankshaft-bearing-set-stage6-r-t-c4-polymer-minarelli-vertical\/","title":{"rendered":"Crankshaft Bearing Set Stage6 R\/T C4 polymer Minarelli vertical"},"content":{"rendered":"<h2>Crankshaft Bearings plastic cage Stage6 R\/T with Oil Seals<\/h2>\n<p>Especially in high-performance engines, the quality of crankshaft bearings and oil seals is crucial. Stage6 has upgraded their kits by pairing their already top-tier SKF bearings with bold orange FKM oil seals from the Stage6 R\/T line \u2013 great look, even better performance.<\/p>\n<p>Fits scooters with Minarelli \/ Minarelli Replica 2-stroke engine, please check dimensions before ordering.<\/p>\n<h3>Crankshaft Bearing Types<\/h3>\n<p>The bearings are available in 2 versions<\/p>\n<p>&#8211; Polymer cage \u2013 designed for racing use. The polymer version offers more flexibility and reduced friction compared to metal cages.<br \/>&#8211; Metal cage \u2013 built for daily street use. More durable than the polymer version, ideal for long-term loads.<\/p>\n<p>Both types are SKF-approved for speeds up to <strong>20,000 RPM<\/strong>. Proper lubrication and correct installation are essential for longevity.<\/p>\n<p><strong>The advantages with the polymer-plastic version compared to metal cages are increased elasticity and reduced friction. We personally this type of bearing for racing engines, but you&#8217;ll have to pay some attention to\u00a0carburetor and ignition settings, as the bearings may only be permanently heated to a maximum of 120\u00b0 to prevent damage to the plastic cage.\u00a0<\/strong><\/p>\n<p><strong>Attention! The polymer cage version should only be installed on engines without a catalytic converter!<\/strong><\/p>\n<p>Please pay attention when installing the bearings:\u00a0The half-open side must face the crankshaft webs.<\/p>\n<p>The newly developed orange FKM oil seals are produced using cutting-edge technology. Compared to older models, they offer longer lifespan and reduced friction for better overall engine efficiency.<\/p>\n<h4>Bearings and Seals Set:<\/h4>\n<ul>\n<li>2x crankshaft bearing SKF 6204-C4 20x47x14mm polymer cage<\/li>\n<li>1x oil seal FKM 20&#215;42\/43x8mm<\/li>\n<li>1x oil seal FKM 20&#215;30\/34x6mm<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Crankshaft Bearings plastic cage Stage6 R\/T with Oil Seals Especially in high-performance engines, the quality of crankshaft bearings and oil seals is crucial. Stage6 has upgraded their kits by pairing their already top-tier SKF bearings with bold orange FKM oil seals from the Stage6 R\/T line \u2013 great look, even better performance. Fits scooters with&hellip;<\/p>\n","protected":false},"featured_media":68673,"template":"","meta":[],"product_brand":[],"product_cat":[8266],"product_tag":[8259],"class_list":["post-69758","product","type-product","status-publish","has-post-thumbnail","product_cat-bottom-end","product_tag-scooter-motorcycle","pa_ausfuehrung-crankshaft-bearing-kit","pa_farbe-variante-r-t","pa_produkt-familie-stage6-r-t","pa_produkt-familie-stage6-r-t-en","description-off","first","instock","product-type-external"],"_links":{"self":[{"href":"https:\/\/stage6-racing.com\/en\/wp-json\/wp\/v2\/product\/69758","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/stage6-racing.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/stage6-racing.com\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/stage6-racing.com\/en\/wp-json\/wp\/v2\/media\/68673"}],"wp:attachment":[{"href":"https:\/\/stage6-racing.com\/en\/wp-json\/wp\/v2\/media?parent=69758"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/stage6-racing.com\/en\/wp-json\/wp\/v2\/product_brand?post=69758"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/stage6-racing.com\/en\/wp-json\/wp\/v2\/product_cat?post=69758"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/stage6-racing.com\/en\/wp-json\/wp\/v2\/product_tag?post=69758"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}