{"product_id":"heavy-hitter-520-primary-drive-conversion-oem-ebmx-ultra-motors","title":"Heavy Hitter 520 Primary Drive Conversion OEM\/EBMX Ultra Motors","description":"\u003cp\u003eThis kit was designed for riders who want to maximize their bike's performance. As seen on EBMX FIM E-Xplorer race team bikes ridden by Jack Field \u0026amp; Jess Gardiner. This is the lightest kit on the market, which means less rotational mass, and resistance. \u003c\/p\u003e\n\u003cp\u003eThis kit consists of a hybrid sprocket setup, with the rear sprocket being a 7075 T6 Billet with anodized hard coating, and the front sprocket being a machined steel sprocket, heat treated, and counter cut for weight reduction. The chain provided is a Fire Power 520 non-o-ring chain made in Japan for the least amount of rotational resistance. \u003c\/p\u003e\n\u003cp\u003eThis primary drive is not a stealth riding kit. This kit is loud but no louder than your typical primary kit. If you're looking for something functional that has been heavily tested this is your kit!\u003c\/p\u003e\n\u003cp\u003eWe do not vulcanize rubber onto our kits because of two simple reasons, Efficiency loss, additional heat \u0026amp; wear. Adding rubber rings on a sprocket will result in a small degree of elasticity which means a loss of power transfer, also reducing the directness of power transfer. The rubber sprocket rings will accelerate chain wear due to additional friction to chain links, and to also include you now have a shelf for debris to sit on for the chain to roll over to pack into the links since there is no place for debris to evacuate to.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Installation and detailed setup info \u003ca href=\"https:\/\/gritshift.com\/pages\/primary-drive-info\" rel=\"noopener\" target=\"_blank\"\u003eHERE\u003c\/a\u003e Please ensure all hardware is tightened \u0026amp; loctite is applied.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFeatures\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eExclusive dished sprocket design for proper clearance\u003c\/li\u003e\n\u003cli\u003e520 non-sealed Japanese Chain included for long-term reliability and reduced rotating mass\u003c\/li\u003e\n\u003cli\u003e7075 aluminum design rear sprocket for reduced rotating mass\u003c\/li\u003e\n\u003cli\u003eLightweight Counter Cut Steel heat-treated front sprocket for added life and wear properties\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMaster link chain for easy chain swaps when it is time for maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/J-YEmDuR_80?si=LshXqBSJ_8vJrs8p\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eSur Ron Ultra Bee OEM Motor\u003cbr\u003eSur Ron Ultra Bee EBMX V1 \u0026amp; V2 XUB-80 Motor\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImportant Notice: \u003c\/strong\u003eFor EBMX \u0026amp; OEM Motor ONLY! Some Aftermarket Motors may have an offset difference, check your chain alignment before riding, most aftermarket motors include shims for proper installation. \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eThis is the known and tested compatibility for this product. Factory variations, dealer options, and aftermarket modifications could affect compatibility in specific cases. Please verify compatibility to the best of your ability before purchasing.\u003c\/span\u003e\u003c\/p\u003e","brand":"GritShift","offers":[{"title":"Default Title","offer_id":40850240503857,"sku":"SQ798285","price":112.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0588\/9707\/2177\/files\/Ultra_Bee_520_Primary_Chain_Conversion_Kit_3.jpg?v=1764634468","url":"https:\/\/kbrides.us\/products\/heavy-hitter-520-primary-drive-conversion-oem-ebmx-ultra-motors","provider":"KB Rides","version":"1.0","type":"link"}