{"product_id":"a2d-900-big-bore-kit-polaris-850-patriot-axys-matryx","title":"A2D 900 Big Bore Kit, Polaris 850 Patriot (AXYS\/Matryx)","description":"\u003cp\u003eThe A2D 900 Big Bore Kit takes a Polaris 850 Patriot to 900 cc using Polaris 9R components. It fits all 850 Patriot engines, AXYS (2019–2020) and Matryx (2021 and newer), and produces a 15–17 hp gain over the stock 850 in our on-snow testing. The base kit ships with the OEM 9R cylinder head; the SLP Power Dome billet head, the 9R OEM Y-pipe, the SLP 9R single pipe full exhaust and the A2D ECU flash are available as add-ons from the option menus above.\u003c\/p\u003e\u003cp\u003eThis is a bolt-on top end: the crankcase, crankshaft and electronics stay stock. The kit is the same combination we build and run at our Anchorage shop.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitment.\u003c\/strong\u003e All Polaris 850 Patriot two-stroke engines: 2019–2020 AXYS and 2021+ Matryx RMK, Pro RMK, Khaos, SKS, Switchback and Indy. Confirm your machine's year and model before ordering; call if you have questions about a specific sled.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e1 × 900 cylinder\u003c\/li\u003e\n\u003cli\u003e2 × Polaris 9R pistons (with rings, wrist pins and circlips)\u003c\/li\u003e\n\u003cli\u003e1 × Polaris OEM 9R cylinder head\u003c\/li\u003e\n\u003cli\u003e2 × lower exhaust valves\u003c\/li\u003e\n\u003cli\u003e2 × upper guillotine exhaust valves\u003c\/li\u003e\n\u003cli\u003e2 × inner O-rings and 2 × outer O-rings\u003c\/li\u003e\n\u003cli\u003e1 × base gasket\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eOptional add-ons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSLP Power Dome billet cylinder head (+$499)\u003c\/strong\u003e in place of the OEM 9R head: better cooling and a further 4–5 hp gain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePolaris 9R OEM Y-pipe (+$229)\u003c\/strong\u003e: better exhaust flow, a further 2–3 hp gain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSLP 9R Single Pipe full exhaust (+$900)\u003c\/strong\u003e: complete SLP single pipe set for the 900.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA2D ECU flash (+$450)\u003c\/strong\u003e: A2D custom calibration for the big bore and the exhaust you choose.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eKit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eA2D 900 Big Bore Kit (A2D-900BB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplacement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e900 cc (from 850 Patriot)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower gain\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15–17 hp (base kit); +4–5 hp with SLP Power Dome head; +2–3 hp with 9R Y-pipe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePistons\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePolaris OEM 9R (2209828), two\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCylinder head\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePolaris OEM 9R, or SLP Power Dome billet (SLP 12-900)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAdd-ons\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e9R OEM Y-pipe; SLP 9R single pipe full exhaust; A2D ECU flash\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFits\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAll Polaris 850 Patriot engines, AXYS and Matryx\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eOrdering and installation:\u003c\/strong\u003e built to order at our Anchorage shop; select in-store pickup at checkout if you are local, or we ship. A2D Motorsports installs and sets up the kit in-house, including clutching for the added power; call (907) 306-3062 to schedule.\u003c\/p\u003e","brand":"A2D Motorsports","offers":[{"title":"OEM 9R Cylinder Head (included) \/ Keep stock exhaust \/ No flash","offer_id":67595598495989,"sku":"A2D-900BB","price":2999.0,"currency_code":"USD","in_stock":true},{"title":"OEM 9R Cylinder Head (included) \/ Keep stock exhaust \/ Add A2D ECU Flash (+$450)","offer_id":67595598528757,"sku":"A2D-900BB-FLASH","price":3449.0,"currency_code":"USD","in_stock":true},{"title":"OEM 9R Cylinder Head (included) \/ Add 9R OEM Y-Pipe (+$229) \/ No flash","offer_id":67595598561525,"sku":"A2D-900BB-YP","price":3228.0,"currency_code":"USD","in_stock":true},{"title":"OEM 9R Cylinder Head (included) \/ Add 9R OEM Y-Pipe (+$229) \/ Add A2D ECU Flash (+$450)","offer_id":67595598594293,"sku":"A2D-900BB-YP-FLASH","price":3678.0,"currency_code":"USD","in_stock":true},{"title":"OEM 9R Cylinder Head (included) \/ Add SLP 9R Single Pipe full exhaust (+$900) \/ No flash","offer_id":67595598627061,"sku":"A2D-900BB-PIPE","price":3899.0,"currency_code":"USD","in_stock":true},{"title":"OEM 9R Cylinder Head (included) \/ Add SLP 9R Single Pipe full exhaust (+$900) \/ Add A2D ECU Flash (+$450)","offer_id":67595598659829,"sku":"A2D-900BB-PIPE-FLASH","price":4349.0,"currency_code":"USD","in_stock":true},{"title":"SLP Power Dome Billet Head (+$499) \/ Keep stock exhaust \/ No flash","offer_id":67595598692597,"sku":"A2D-900BB-SLP","price":3498.0,"currency_code":"USD","in_stock":true},{"title":"SLP Power Dome Billet Head (+$499) \/ Keep stock exhaust \/ Add A2D ECU Flash (+$450)","offer_id":67595598725365,"sku":"A2D-900BB-SLP-FLASH","price":3948.0,"currency_code":"USD","in_stock":true},{"title":"SLP Power Dome Billet Head (+$499) \/ Add 9R OEM Y-Pipe (+$229) \/ No flash","offer_id":67595598758133,"sku":"A2D-900BB-SLP-YP","price":3727.0,"currency_code":"USD","in_stock":true},{"title":"SLP Power Dome Billet Head (+$499) \/ Add 9R OEM Y-Pipe (+$229) \/ Add A2D ECU Flash (+$450)","offer_id":67595598790901,"sku":"A2D-900BB-SLP-YP-FLASH","price":4177.0,"currency_code":"USD","in_stock":true},{"title":"SLP Power Dome Billet Head (+$499) \/ Add SLP 9R Single Pipe full exhaust (+$900) \/ No flash","offer_id":67595598823669,"sku":"A2D-900BB-SLP-PIPE","price":4398.0,"currency_code":"USD","in_stock":true},{"title":"SLP Power Dome Billet Head (+$499) \/ Add SLP 9R Single Pipe full exhaust (+$900) \/ Add A2D ECU Flash (+$450)","offer_id":67595598856437,"sku":"A2D-900BB-SLP-PIPE-FLASH","price":4848.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/0267\/9029\/files\/polaris-2209828-9r-piston-kit_e20f1956-11f4-4be2-84de-2cc47d71e10f.jpg?v=1790793780","url":"https:\/\/a2dmotorsports.net\/products\/a2d-900-big-bore-kit-polaris-850-patriot-axys-matryx","provider":"Shop A2D Motorsports ","version":"1.0","type":"link"}