{"product_id":"muelle-de-contraste-polini-evo-slider-15-yamaha-majesty-400-a-partir-del-2009","title":"Yamaha Majesty 400 Clutch Spring \u003e09 Evo Slider +15% Polini","description":"\u003cp\u003e\u003cstrong\u003eSpring 15% harder than original\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe hardness of the contrast spring plays \u003cstrong\u003ean important role\u003c\/strong\u003e in transmitting the engine's power to the rear wheel. \u003cbr\u003eIt exerts \u003cstrong\u003eback pressure on the rear pulleys\u003c\/strong\u003e and therefore has a considerable influence on the operation of the variator. The contrast spring is usually harder if the belt tends to slip, if the variator does not \u003cstrong\u003eoperate at the optimal RPM level\u003c\/strong\u003e, or if the engine, despite light weights, continues to run below the optimal RPM.\u003cbr\u003e What negatively affects engine performance is a twisted contrast spring. With the \u003cstrong\u003eEvo-Slider plate\u003c\/strong\u003e, the manufacturer Polini provides a solution to this problem.\u003c\/p\u003e\n\u003cp\u003eThis is a small plate that is mounted between the contrast spring and the clutch, which \u003cstrong\u003ereduces torsion\u003c\/strong\u003e to a minimum. In addition, the Polini Evo-Slider absorbs \u003cstrong\u003epulley vibrations\u003c\/strong\u003e at high RPM. \u003cbr\u003eThe result is a \u003cstrong\u003esmoother engine\u003c\/strong\u003e and \u003cstrong\u003ebetter transmission\u003c\/strong\u003e of power to the rear wheel. \u003cbr\u003eThe \u003cstrong\u003ethicker\u003c\/strong\u003e the diameter, the \u003cstrong\u003eharder the contrast spring\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe kit includes\u003c\/strong\u003e a harder spring and an Evo-Slider spacer. \u003cbr\u003eThe \u003cstrong\u003ePolini Evo-Slider\u003c\/strong\u003e allows the spring to rotate, which significantly improves the Maxiscooter's behaviour when \u003cstrong\u003estarting from a standstill and throttle response.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eValid for:\u003c\/strong\u003e\u003cbr\u003e    MBK Evolis ABS 400i H2O 4T E3 2014-2016\u003cbr\u003e    MBK Evolis ABS 400i H2O 4T E4 2017\u003cbr\u003e    MBK Evolis II ABS 400i H2O 4T E4 2018\u003cbr\u003e    Yamaha Majesty 400i H2O 4T E3 2007-2008\u003cbr\u003e    Yamaha Majesty 400i H2O 4T E3 2009-2011\u003cbr\u003e    Yamaha X-Max III 400i H2O 4T E3 2013-2016\u003cbr\u003e    Yamaha X-Max III ABS 400i H2O 4T E3 2013-2016\u003cbr\u003e    Yamaha X-Max III ABS 400i H2O 4T E4 2017\u003cbr\u003e    Yamaha X-Max IV ABS 400i H2O 4T E4 2018-2020\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e","brand":"Polini Motori s.p.a.","offers":[{"title":"Default Title","offer_id":54304526598529,"sku":"243.097","price":36.81,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0860\/6223\/5959\/files\/243.097.jpg?v=1750255059","url":"https:\/\/motoscoot.net\/en\/products\/contrast-spring-polini-evo-slider-15-yamaha-majesty-400-from-2009","provider":"Motoscoot","version":"1.0","type":"link"}