{"product_id":"rotax-max-erave-bellow-spring-large","title":"12. 939280 Rotax Max E-RAVE Bellow Spring Large 134mm","description":"\u003cp\u003eThe \u003cstrong\u003eRotax Max E-RAVE Bellow Spring Large 134mm\u003c\/strong\u003e (R.939280) is the OEM large coil spring that provides the primary return force for the power valve bellow (R.260723) in the Rotax 125 MAX EVO E-RAVE system. This heavier spring sets the baseline resistance that the solenoid must overcome to open the exhaust valve, effectively determining the RPM threshold at which the power valve begins to open. A fatigued or broken large bellow spring causes premature valve opening or failure to open, altering the engine's power curve and RPM characteristics.\u003c\/p\u003e\n\u003cp\u003eFits the Rotax 125 \u003cstrong\u003eSenior MAX EVO and Junior MAX EVO\u003c\/strong\u003e. Works alongside the small bellow spring (R.838255) inside the bellow assembly. Replace both springs whenever the bellow is serviced.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e R.939280\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 134 x 3.0 x 0.65mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Rotax 125 Senior MAX EVO, Junior MAX EVO\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCMC Karting stocks both E-RAVE bellow springs together so you can replace the complete spring set in one order.\u003c\/p\u003e","brand":"KSG\/Karting Solutions Group","offers":[{"title":"Default Title","offer_id":48139141054685,"sku":"R.939280","price":7.9,"currency_code":"USD","in_stock":true}],"url":"https:\/\/cmckarting.com\/products\/rotax-max-erave-bellow-spring-large","provider":"CMC Karting","version":"1.0","type":"link"}