{"id":7839,"date":"2026-03-14T16:08:59","date_gmt":"2026-03-14T15:08:59","guid":{"rendered":"https:\/\/www.ecubitt.com\/mt09-r9-valve-spring-kit\/"},"modified":"2026-03-14T16:17:47","modified_gmt":"2026-03-14T15:17:47","slug":"mt09-r9-valve-spring-kit","status":"publish","type":"product","link":"https:\/\/www.ecubitt.com\/en\/mt09-r9-valve-spring-kit\/","title":{"rendered":"MT09 \/ R9 valve spring kit"},"content":{"rendered":"

Racing Kit: Oval-Section Springs + Grade 5 Titanium Retainers<\/b><\/h2>\n

This high-performance kit is the ultimate solution to optimize the valvetrain of <\/span>Yamaha CP3 (3-cylinder)<\/b> engines. By combining oval-technology springs with ultra-light titanium retainers, you get superior valve control at high RPM and with aggressive cam profiles.<\/span><\/p>\n

Specific Compatibility:<\/b><\/h3>\n

Designed as a direct replacement for the original steel components for:<\/span><\/p>\n

    \n
  • Yamaha MT-09 \/ Tracer 9 \/ XSR900 \/ YZF-R9<\/b> (CP3 engine)<\/span><\/li>\n<\/ul>\n

    Grade 5 Titanium Retainers (Ultra-Light)<\/b><\/h3>\n

    Made from <\/span>Grade 5<\/b> titanium (top quality), these retainers drastically reduce the valvetrain\u2019s reciprocating mass:<\/span><\/p>\n

      \n
    • Original weight (steel):<\/b> 7.0 g<\/span><\/li>\n
    • Titanium weight:<\/b> 4.4 g<\/b> (37% reduction)<\/span><\/li>\n
    • Optimized profile:<\/b> They\u2019re 0.75 mm shorter than stock, allowing <\/span>more valve lift<\/b> with no risk of contact with the oil seal and without needing to modify the valve guides.<\/span><\/li>\n<\/ul>\n

      Oval-Section Valve Springs<\/b><\/h3>\n

      Made in Japan from <\/span>Chrome-Silicon-Vanadium (Super Clean)<\/b> alloy, they offer extreme fatigue resistance.<\/span><\/p>\n

        \n
      • Oval technology:<\/b> Allows higher pressures with less mechanical stress and a reduced solid height.<\/span><\/li>\n
      • Progressive winding:<\/b> Prevents harmonic resonance and valve \u201cbounce\u201d or float.<\/span><\/li>\n
      • Surface treatment:<\/b> <\/span>Shot peening<\/span><\/i> process and multi-stage heat treatment for extended service life in racing.<\/span><\/li>\n<\/ul>\n

        Kit Specifications:<\/b><\/h3>\n
          \n
        • Contents:<\/b> 12 oval-section springs + 12 titanium retainers (6 intake \/ 6 exhaust) + 6 intake shims (1.0 mm).<\/span><\/li>\n
        • Installed height:<\/b> 32.0 mm (with supplied shims).<\/span><\/li>\n
        • Seat pressure:<\/b> 58 lb \/ 25.7 kgf.<\/span><\/li>\n
        • Open pressure (10.0 mm):<\/b> 139 lb \/ 61.8 kgf.<\/span><\/li>\n
        • Recommended Max Lift: <\/b> 0.395″ \/ 10.0 mm.<\/span><\/li>\n<\/ul>\n

           <\/p>\n

          Key Benefits:<\/b><\/h3>\n
            \n
          1. \n
              \n
            1. Higher RPM limit:<\/b> The weight reduction in the retainers lets the engine rev higher more safely.<\/span><\/li>\n
            2. Total control:<\/b> Prevents valve float when using cams with more overlap and lift.<\/span><\/li>\n
            3. Direct fit:<\/b> Compatible with the rest of the stock internal components.<\/span><\/li>\n<\/ol>\n<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

              Racing Kit: Oval-Section Springs + Grade 5 Titanium Retainers<\/b><\/h2>\n

              CP3 ENGINE<\/p>\n","protected":false},"featured_media":7840,"template":"","meta":[],"product_brand":[],"product_cat":[266],"product_tag":[],"class_list":["post-7839","product","type-product","status-publish","has-post-thumbnail","product_cat-motor-en","categorias-marcas-ecubitt-performance-en","first","onbackorder","taxable","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/www.ecubitt.com\/en\/wp-json\/wp\/v2\/product\/7839","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ecubitt.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.ecubitt.com\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ecubitt.com\/en\/wp-json\/wp\/v2\/media\/7840"}],"wp:attachment":[{"href":"https:\/\/www.ecubitt.com\/en\/wp-json\/wp\/v2\/media?parent=7839"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.ecubitt.com\/en\/wp-json\/wp\/v2\/product_brand?post=7839"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.ecubitt.com\/en\/wp-json\/wp\/v2\/product_cat?post=7839"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.ecubitt.com\/en\/wp-json\/wp\/v2\/product_tag?post=7839"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}