{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"e17f10cc5d8b","name":"KTM SX-F 350 2019-2020 EXC-F 350 2020 90mm 366cc BIG BORE KIT","sku":"CW.51008-K01","brand":"Cylinder Works","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":1012.5,"formatted":"£1,012.50"},"summary":"Big Bore Cylinder Kit for 4-Cycle engines. Features a 90mm cylinder diameter, 366cc displacement, and a 14.0:1 compression ratio. This new cast aluminum nickel silicon carbide (NSC) electroplated cylinder increases horsepower and engine displacement. The NSC surface provides excellent wear resistance and oil retention, with a diamond honed finish for proper ring seal. Includes a hand matched Vertex forged 2618 aluminum alloy big bore piston (available in A, B, C, D sizes) for superior strength and durability. Also includes a complete Vertex big bore gasket kit with head, base, exhaust gaskets, and O-rings for top-end rebuilds.","attributes":[],"image":"https://www.twsgb.co.uk/Graphics/Std_Product_Images/ktm-sx-f-350-2019-2020-exc-f-350-2020-90mm-366cc-big-bore-kit-11416-p.jpg","images":["https://www.twsgb.co.uk/Graphics/Std_Product_Images/ktm-sx-f-350-2019-2020-exc-f-350-2020-90mm-366cc-big-bore-kit-11416-p.jpg"],"description":"Big Bore Cylinder Kit for 4-Cycle engines. Features a 90mm cylinder diameter, 366cc displacement, and a 14.0:1 compression ratio. This new cast aluminum nickel silicon carbide (NSC) electroplated cylinder increases horsepower and engine displacement. The NSC surface provides excellent wear resistance and oil retention, with a diamond honed finish for proper ring seal. Includes a hand matched Vertex forged 2618 aluminum alloy big bore piston (available in A, B, C, D sizes) for superior strength and durability. Also includes a complete Vertex big bore gasket kit with head, base, exhaust gaskets, and O-rings for top-end rebuilds.","descriptionMarkdown":"### High Performance 366cc Big Bore Cylinder Kit\n\nUpgrade your engine performance with this premium Big Bore Kit, designed to provide a significant boost in displacement and power. This kit is engineered to increase your engine to 366cc, delivering a more exhilarating riding experience and improved torque across the powerband.\n\n### Precision Engineered Components\n\nThis kit features a new, cast aluminum big bore cylinder treated with a nickel silicon carbide (NSC) electroplated finish. This advanced composite coating provides a superior wear-resistant surface with excellent oil retention capabilities. Each cylinder is diamond honed to exact specifications, ensuring an optimal ring seal and consistent engine performance.\n\n### Vertex Forged Piston Technology\n\nThe included Vertex piston is forged from high-quality 2618 aluminum alloy, providing the strength and durability required to handle increased internal combustion pressures. Utilizing unique piston profiles and a 14.0:1 compression ratio, these pistons are hand matched to the cylinder to maximize power output while effectively reducing blow-by and oil consumption.\n\n### Complete Top End Rebuild Solution\n\nEach kit arrives ready for installation with all the necessary components for a top end rebuild. By including all essential gaskets and O-rings, this package simplifies the maintenance process and ensures a factory-grade seal for your engine.\n\n### Key Features\n\n \n- Displacement: Increased to 366cc via a 90mm cylinder bore\n \n- Compression Ratio: 14.0:1 for enhanced power delivery\n \n- Cylinder Material: Cast aluminum with nickel silicon carbide (NSC) plating\n \n- Piston Construction: Forged 2618 aluminum alloy for maximum durability\n \n- Precision Matching: Vertex piston hand matched to the Cylinder Works cylinder\n \n- Maintenance Ready: Includes comprehensive top end gasket and O-ring set","weightGrams":null,"fitments":[],"collections":[],"links":{"page":"https://www.2brosparts.com/products/ktm-sx-f-350-2019-2020-exc-f-350-2020-90mm-366cc-big-bore-kit","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/e17f10cc5d8b:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/e17f10cc5d8b:1"}},"market":{"country":"GB","countryName":"United Kingdom","locale":"en-gb","currency":"GBP","exchangeRateFromGbp":1,"pricesIncludeUkVat":true,"checkoutTax":null,"delivery":[{"name":"Standard","description":"Orders £15.00–£59.99 · 2–4 business days","carrier":null,"estimatedDays":"2–4 business days","price":{"amount":4.99,"formatted":"£4.99"},"free":false,"minimumOrder":{"amount":0,"formatted":"£0.00","gbp":0},"weightGrams":null},{"name":"Standard","description":"Orders £60.00 and up · 2–4 business days","carrier":null,"estimatedDays":"2–4 business days","price":{"amount":0,"formatted":"£0.00"},"free":true,"minimumOrder":{"amount":60,"formatted":"£60.00","gbp":60},"weightGrams":null}],"storeUrl":"https://www.2brosparts.com"},"navigate":{"start":"https://www.2brosparts.com/api/agent","search":"https://www.2brosparts.com/api/agent/search/GB/{words+joined+with+plus}"},"howToBuy":{"summary":"Build a basket for the shopper and give them one checkout link. 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Each product also has links.buyOneNow, a ready link for one unit.","stateless":"Nothing is saved on our side. The items part of the URL is the whole basket: to change it, write the link again with the new list.","itemsFormat":"basketKey:quantity pairs joined by commas, e.g. 04f24aad4d68:2,7c1e9a0b3f2d:1. Quantity defaults to 1. Up to 50 products, 100 each.","country":"GB is the shopper's delivery country. Swap it for theirs (US, DE, FR…) in any URL; currency, tax and delivery follow it.","tips":["Put everything the shopper wants in one link.","Optionally add your name as a last path segment on checkout links (…/checkout/GB/<items>/claude) so the sale is credited to you.","The checkout link is for the shopper's browser. Do not open it yourself.","Signed-in trade account holders see their trade prices at checkout."]}}