{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"e31a8a2817f6","name":"KTM SX-F 350 2013-2015 90mm 366cc BIG BORE KIT","sku":"CW.51003-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 with a hand matched Vertex piston and top-end gasket kit. Increases horsepower and engine displacement. Features a new, cast aluminum nickel silicon carbide (NSC) electroplated big bore cylinder that increases horsepower. NSC provides an excellent wear resistant surface with oil retention capabilities. Cylinders are diamond honed to the exact bore dimension and proper surface finish for proper ring seal and oil retention. Vertex big bore four stroke pistons are forged from 2618 aluminum alloy for superior strength and durability. Vertex uses unique piston profiles and compression ratios in A, B, C, and D sizes to maximize power and performance while reducing blow-by and oil consumption. Each Vertex piston is hand matched to fit each Cylinder Works cylinder perfectly. The gasket kit contains all necessary gaskets to rebuild your top end, including head, base, and exhaust gaskets, as well as O-rings. Compression Ratio 13.5:1. Cylinder Diameter 90 mm. Displacement 366 cc. Engine Type 4-Cycle.","attributes":[],"image":"https://www.twsgb.co.uk/Graphics/Std_Product_Images/ktm-sx-f-350-2013-2015-90mm-366cc-big-bore-kit-11412-p.jpg","images":["https://www.twsgb.co.uk/Graphics/Std_Product_Images/ktm-sx-f-350-2013-2015-90mm-366cc-big-bore-kit-11412-p.jpg"],"description":"Big bore cylinder kit with a hand matched Vertex piston and top-end gasket kit. Increases horsepower and engine displacement. Features a new, cast aluminum nickel silicon carbide (NSC) electroplated big bore cylinder that increases horsepower. NSC provides an excellent wear resistant surface with oil retention capabilities. Cylinders are diamond honed to the exact bore dimension and proper surface finish for proper ring seal and oil retention. Vertex big bore four stroke pistons are forged from 2618 aluminum alloy for superior strength and durability. Vertex uses unique piston profiles and compression ratios in A, B, C, and D sizes to maximize power and performance while reducing blow-by and oil consumption. Each Vertex piston is hand matched to fit each Cylinder Works cylinder perfectly. The gasket kit contains all necessary gaskets to rebuild your top end, including head, base, and exhaust gaskets, as well as O-rings. Compression Ratio 13.5:1. Cylinder Diameter 90 mm. Displacement 366 cc. Engine Type 4-Cycle.","descriptionMarkdown":"### Performance Big Bore Cylinder Kit\n\nBoost your engine displacement and unlock significant horsepower gains with this premium big bore cylinder kit. Designed for riders seeking an exhilarating performance upgrade, this kit provides a reliable way to increase power output without compromising the longevity of your engine.\n\n### Key Features\n\n \n- Increased Displacement: Features a 90mm cylinder diameter to increase engine displacement to 366cc.\n \n- Precision Engineering: The cylinder is constructed from cast aluminum with a nickel silicon carbide (NSC) electroplated finish for exceptional wear resistance and superior oil retention.\n \n- Diamond Honed Finish: Cylinders are diamond honed to exact specifications to ensure optimal ring seal and consistent performance.\n \n- Vertex Forged Piston: Includes a high-quality, forged 2618 aluminum alloy piston designed for superior strength and durability under high-pressure conditions.\n \n- Hand-Matched Components: Each Vertex piston is precision-matched to its corresponding Cylinder Works cylinder to ensure a perfect fit, reduced blow-by, and lower oil consumption.\n \n- Complete Top-End Rebuild Kit: Comes with a comprehensive gasket kit, including head, base, and exhaust gaskets, plus all necessary O-rings required for a complete professional installation.\n\n### Technical Specifications\n\n \n- Kit Type: Big Bore\n \n- Cylinder Diameter: 90 mm\n \n- Displacement: 366 cc\n \n- Compression Ratio: 13.5:1\n \n- Engine Type: 4-Cycle\n\nThis kit offers an OEM-appearing solution that maintains a factory aesthetic while delivering a substantial increase in torque and power. Whether you are rebuilding your top end or looking for a competitive edge on the track, this kit provides the reliability and performance required for demanding riding conditions.","weightGrams":null,"fitments":[],"collections":[],"links":{"page":"https://www.2brosparts.com/products/ktm-sx-f-350-2013-2015-90mm-366cc-big-bore-kit","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/e31a8a2817f6:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/e31a8a2817f6:1"}},"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. Every URL is a plain path (no query string) and a GET. Nothing is stored between calls.","checkoutLinkFormat":"https://www.2brosparts.com/api/agent/checkout/GB/{basketKey}:{quantity},{basketKey}:{quantity}","steps":["1. Find products: follow links in these responses, or fetch https://www.2brosparts.com/api/agent/search/GB/{words+joined+with+plus} (e.g. https://www.2brosparts.com/api/agent/search/GB/brake+pads). Every product has a basketKey.","2. Optional check: https://www.2brosparts.com/api/agent/basket/GB/{basketKey}:{quantity},{basketKey}:{quantity} returns stock, totals per delivery option and the checkout link.","3. Give the shopper the checkout link. Opening it fills their basket with exactly these items (replacing what was there) and opens checkout for United Kingdom. They pay on 2brosparts.com through Stripe."],"noFetchNeeded":"You can write the checkout link yourself from basketKeys and quantities; nothing has to be fetched first. 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."]}}