{"product_id":"1128191","title":"VERTEX Top block kit","description":"\u003cp\u003e \u003cstrong\u003eVertex Top End Piston Kit\u003c\/strong\u003e\u003cbr\u003e FITS MODELS\u003cbr\u003e 85 SX (18-23); 85 SX BW (18-23); MC 85 (21); MC 85 1714 (22-23); MC 85 1916 (21-23); TC 85 (18-23); TC 85 BW (23)\u003cbr\u003e SPECS\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Compression Ratio STD\u003c\/li\u003e\n\n\u003cli\u003e Cylinder Diameter 47 mm\u003c\/li\u003e\n\n\u003cli\u003e Displacement 85 cc\u003c\/li\u003e\n\n\u003cli\u003e Piston Diameter 46.940mm\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch3\u003e \u003cstrong\u003eVertex Two-stroke Pistons\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n \u003cp\u003eBecause of a cast piston's ability to contain higher silicon content compared to forged pistons, and because twostrokes have lower cylinder pressures when compared to four-strokes, cast pistons are ideal for two-stroke engines. Vertex pistons are gravity cast from an aluminum alloy with 18% silicon content. Silicon is important because:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e It decreases thermal expansion, which changes the geometry after the piston reaches operating temperature. With low thermal expansion characteristics, Vertex pistons can be run at tighter tolerances compared with forged pistons. This creates better power and performance, also making them less susceptible to rattling or breaking.\u003c\/li\u003e\n\n\u003cli\u003e Silicon gives the pistons better wear characteristics and prolongs piston life by decreasing wear on the piston skirt.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"VERTEX","offers":[{"title":"46.94 \/ A \/ Ø 46,940 mm","offer_id":53614036189513,"sku":"1128191001","price":156.91,"currency_code":"EUR","in_stock":false},{"title":"46.95 \/ B \/ Ø 46,950 mm","offer_id":53614036222281,"sku":"1128191002","price":156.91,"currency_code":"EUR","in_stock":false},{"title":"46.96 \/ C \/ Ø 46,960 mm","offer_id":53614036255049,"sku":"1128191003","price":156.91,"currency_code":"EUR","in_stock":false},{"title":"46.97 \/ D \/ Ø 46,970 mm","offer_id":53614036287817,"sku":"1128191004","price":156.91,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0254\/9651\/8741\/files\/800Wx800H-1128191001-1_5d3f5b26-8b4e-49ab-ab0b-b0ff85334532.jpg?v=1767622497","url":"https:\/\/www.motocrossshop.nl\/en\/products\/1128191","provider":"MotoXshop","version":"1.0","type":"link"}