{"product_id":"keller-polaris-rzr-800-ball-joints","title":"Keller Polaris RZR 800 Ball Joints (2008-2014)","description":"\u003cp\u003e\u003cstrong\u003ePolaris RZR 800 ball joints fail at the snap ring, not the joint itself.\u003c\/strong\u003e That thin clip is the only thing holding a factory joint in the A-arm, and on a machine this age it deforms or shears under landings and the extra leverage of bigger tires. Keller ball joints remove it entirely — the two-piece housing threads into the arm like a nut and bolt. Hardened 4340 chromoly, greaseable, adjustable and rebuildable.\u003c\/p\u003e\n\u003cp\u003eTodd Keller's original threaded design, covering the RZR 800, RZR S 800 and RZR 4 800. On these machines the same joint serves both positions, so you simply choose how many you need.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTwo-piece threaded housing eliminates the OEM snap ring\u003c\/li\u003e\n\u003cli\u003e4340 hardened chromoly steel housings and studs\u003c\/li\u003e\n\u003cli\u003eAdjustable and greaseable for correct stud articulation over years of service\u003c\/li\u003e\n\u003cli\u003eRebuildable — a worn joint is serviced, not replaced\u003c\/li\u003e\n\u003cli\u003eOne joint fits both upper and lower positions on this platform\u003c\/li\u003e\n\u003cli\u003eCovers the RZR 800, RZR S 800 and RZR 4 800\u003c\/li\u003e\n\u003cli\u003eLimited lifetime warranty against manufacturing defects\u003c\/li\u003e\n\u003cli\u003eMade in USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eBuilt To Solve: RZR 800 Ball Joint Pull-Out and Snap Ring Failure\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSnap ring shearing and letting the joint separate from the A-arm\u003c\/li\u003e\n\u003cli\u003eClunking or knocking from the front end over rough ground and whoops\u003c\/li\u003e\n\u003cli\u003ePlay in the wheel when rocked top-to-bottom on a jack\u003c\/li\u003e\n\u003cli\u003eOriginal joints that have simply reached the end of their life on a fifteen-year-old machine\u003c\/li\u003e\n\u003cli\u003eTorn boots admitting water and grit so the joint wears from the inside\u003c\/li\u003e\n\u003cli\u003eReplacing the same joint often enough that it has become routine maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eBest For: RZR 800 and RZR S 800 Front End Rebuilds\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRZR 800, RZR S 800 and RZR 4 800 owners refreshing tired original suspension\u003c\/li\u003e\n\u003cli\u003eRiders keeping an older machine in service rather than replacing it\u003c\/li\u003e\n\u003cli\u003eTrail and desert riders loading the front end hard on landings\u003c\/li\u003e\n\u003cli\u003eOwners running larger tires than the machine left the factory with\u003c\/li\u003e\n\u003cli\u003eAnyone who wants a serviceable joint rather than another disposable one\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBecause these machines are long out of production, most buyers here are doing a full front-end refresh rather than chasing a single failure.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMaterial: 4340 hardened chromoly steel, stud and housing\u003c\/li\u003e\n\u003cli\u003eDesign: two-piece threaded housing, no snap ring\u003c\/li\u003e\n\u003cli\u003eServiceability: adjustable, greaseable and rebuildable\u003c\/li\u003e\n\u003cli\u003eA-arm modification: not required\u003c\/li\u003e\n\u003cli\u003ePositions: one joint serves both upper and lower on this platform\u003c\/li\u003e\n\u003cli\u003eWarranty: limited lifetime against manufacturing defects, original purchaser\u003c\/li\u003e\n\u003cli\u003eManufacturer Part Number: BJK-P-RG#AG (one joint), BJK-P-RG-K-2#AG (two joints), BJK-P-RG-K-4#AG (four joints)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePolaris RZR 800: 2008-2014\u003c\/li\u003e\n\u003cli\u003ePolaris RZR S 800: 2009-2014\u003c\/li\u003e\n\u003cli\u003ePolaris RZR 4 800: 2010-2014\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAll three 800-class cars are covered, though each enters the range in a different year. Fitment is not guaranteed on applications not listed above.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003ch3\u003eWhy do RZR 800 ball joints pull out of the A-arm?\u003c\/h3\u003e\n\u003cp\u003eThe factory joint is retained by a snap ring seated in a groove. Landings and the extra leverage of bigger tires can deform or shear that ring, and once it goes the joint has nothing holding it. Keller joints thread into the A-arm instead, so there is no clip to fail.\u003c\/p\u003e\n\u003ch3\u003eDo these fit the RZR S 800 and the four-seat RZR 4 800?\u003c\/h3\u003e\n\u003cp\u003eYes. The RZR 800 is covered from 2008, the RZR S 800 from 2009 and the RZR 4 800 from 2010, all through 2014.\u003c\/p\u003e\n\u003ch3\u003eDo I need different joints for the upper and lower positions?\u003c\/h3\u003e\n\u003cp\u003eNo. On the 800 the same Keller joint serves both positions, which is why this product is sold by quantity rather than by upper and lower. Choose one, two, or a set of four for a complete front end.\u003c\/p\u003e\n\u003ch3\u003eAre these worth fitting to a machine this old?\u003c\/h3\u003e\n\u003cp\u003eThat is the usual reason people buy them. A Keller joint is rebuildable, so on a machine you intend to keep running it is the last set of joints you should need to buy rather than another round of the part that keeps failing.\u003c\/p\u003e\n\u003ch3\u003eDo Keller ball joints require A-arm modification?\u003c\/h3\u003e\n\u003cp\u003eStandard Keller joints do not — they thread into the factory arm as supplied. The Mega version uses an oversized housing and does require machined A-arms, which is the main reason to pick one over the other.\u003c\/p\u003e\n\u003ch3\u003eCan these be rebuilt instead of replaced?\u003c\/h3\u003e\n\u003cp\u003eYes. They grease and adjust, and the Keller ball joint rebuild kit for Polaris services them with a new cup, boot and pin when the internals eventually wear.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhy Keller\u003c\/h2\u003e\n\u003cp\u003eTodd Keller designed the two-piece threaded ball joint to fix the one part of a stock front end that keeps failing, and SuperATV now builds and backs the line. The design has barely changed because it does not need to: thread the housing in like a nut and bolt, use a chromoly stud, and make the whole assembly serviceable so a worn joint gets rebuilt rather than binned.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eComplete Your RZR 800 Front End Rebuild\u003c\/h2\u003e\n\u003cp\u003eBefore ordering, decide whether you are replacing a single failure or refreshing all four corners — the set of four covers a complete front end, which is what most 800 owners need at this point in the machine's life. If the boots are torn but the joints are sound, the Keller boot replacement kit is the cheaper fix. If the joints are worn but the housings are good, the Keller rebuild kit for Polaris services them. Tie rods and A-arm bushings are worth inspecting while everything is apart.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eInstallation Video\u003c\/h2\u003e\n\u003cp\u003eOfficial SuperATV installation walkthrough with Todd Keller: \u003ca href=\"https:\/\/www.youtube.com\/watch?v=Mbt4iX4DWRA\" target=\"_blank\" rel=\"noopener\"\u003eHow To Install Keller Ball Joints\u003c\/a\u003e\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Why do RZR 800 ball joints pull out of the A-arm?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The factory joint is retained by a snap ring seated in a groove. Landings and the extra leverage of bigger tires can deform or shear that ring, and once it goes the joint has nothing holding it. Keller joints thread into the A-arm instead, so there is no clip to fail.\"}},{\"@type\":\"Question\",\"name\":\"Do these fit the RZR S 800 and the four-seat RZR 4 800?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. The RZR 800 is covered from 2008, the RZR S 800 from 2009 and the RZR 4 800 from 2010, all through 2014.\"}},{\"@type\":\"Question\",\"name\":\"Do I need different joints for the upper and lower positions?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. On the 800 the same Keller joint serves both positions, which is why this product is sold by quantity rather than by upper and lower. Choose one, two, or a set of four for a complete front end.\"}},{\"@type\":\"Question\",\"name\":\"Are these worth fitting to a machine this old?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"That is the usual reason people buy them. A Keller joint is rebuildable, so on a machine you intend to keep running it is the last set of joints you should need to buy rather than another round of the part that keeps failing.\"}},{\"@type\":\"Question\",\"name\":\"Do Keller ball joints require A-arm modification?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Standard Keller joints do not - they thread into the factory arm as supplied. The Mega version uses an oversized housing and does require machined A-arms, which is the main reason to pick one over the other.\"}},{\"@type\":\"Question\",\"name\":\"Can these be rebuilt instead of replaced?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. They grease and adjust, and the Keller ball joint rebuild kit for Polaris services them with a new cup, boot and pin when the internals eventually wear.\"}}]},{\"@type\":\"VideoObject\",\"name\":\"How To Install Keller Ball Joints With Todd Keller\",\"description\":\"Official SuperATV walkthrough showing how Keller two-piece threaded ball joints install into the A-arm without a snap ring.\",\"thumbnailUrl\":\"https:\/\/i.ytimg.com\/vi\/Mbt4iX4DWRA\/hqdefault.jpg\",\"uploadDate\":\"2022-08-03\",\"embedUrl\":\"https:\/\/www.youtube.com\/embed\/Mbt4iX4DWRA\",\"contentUrl\":\"https:\/\/www.youtube.com\/watch?v=Mbt4iX4DWRA\"}]}\u003c\/script\u003e","brand":"Keller","offers":[{"title":"1 joint","offer_id":51388803481636,"sku":"BJK-P-RG#AG","price":153.95,"currency_code":"USD","in_stock":true},{"title":"2 joints","offer_id":51388803514404,"sku":"BJK-P-RG-K-2#AG","price":307.9,"currency_code":"USD","in_stock":true},{"title":"Full front end — 4 joints","offer_id":51388803547172,"sku":"BJK-P-RG-K-4#AG","price":615.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0694\/6488\/3236\/files\/bjk-p-tspr-k-4_2_2_1_1_1_1_1_1_1_1_1.jpg?v=1788504337","url":"https:\/\/dunes2dezertsxs.com\/products\/keller-polaris-rzr-800-ball-joints","provider":"Dunes 2 Dezert SXS","version":"1.0","type":"link"}