{"product_id":"o-s-engine-1dr00-o-s-speed-r21-euro-ii","title":"O.S.Engine 1DR00 - O.S. SPEED R21 Euro II","description":"\u003ch2\u003eO.S. Engine 1DR00 – O.S. SPEED R21 EURO II\u003c\/h2\u003e\n\n\u003ch3\u003e3.49 cc competition engine for 1\/8 on-road\u003c\/h3\u003e\n\n\u003cp\u003eThe O.S. SPEED R21 EURO II is a high-performance nitro engine developed specifically for European 1\/8 on-road racing. The engine builds on the well-known R21 EURO Spec and has received a number of improvements that give more power and better driveability – especially at low and medium revs.\u003c\/p\u003e\n\n\u003cp\u003eThe revised crankshaft with three tungsten counterweights improves torque feel at low and medium revs as well as idle stability. The engine's ability to drop revs quickly and in a controlled way has also been improved, which is an advantage on long, demanding race tracks.\u003c\/p\u003e\n\n\u003ch3\u003eImproved cooling\u003c\/h3\u003e\n\n\u003cp\u003eThe new outer cooling head is based on the design from the O.S. R2104. The construction combines low weight with effective cooling and features original laser engraving. The engine also uses a new inner head with an integrated O-ring made of oil-resistant material.\u003c\/p\u003e\n\n\u003ch3\u003eNew cylinder, piston and crankcase\u003c\/h3\u003e\n\n\u003cp\u003eThe cylinder has 7 ports, and both the cylinder and the piston have been redesigned. Among other things, cooling holes have been added at the lower part of the exhaust area, and the crankcase has also been given a new design.\u003c\/p\u003e\n\n\u003ch3\u003e21M2 (B) carburettor\u003c\/h3\u003e\n\n\u003cp\u003eThe engine comes with the popular 21M2 (B) carburettor, which is designed to let you make full use of the engine's potential. An f8.5 reducer is included as standard.\u003c\/p\u003e\n\n\u003ch3\u003eProduct details\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eManufacturer: O.S. Engine\u003c\/li\u003e\n\u003cli\u003eItem number: 1DR00\u003c\/li\u003e\n\u003cli\u003eModel: O.S. SPEED R21 EURO II\u003c\/li\u003e\n\u003cli\u003eType: 2-stroke nitro\/glow engine\u003c\/li\u003e\n\u003cli\u003eUse: 1\/8 on-road racing\u003c\/li\u003e\n\u003cli\u003eDisplacement: 3.49 cc\u003c\/li\u003e\n\u003cli\u003eBore: 16.08 mm\u003c\/li\u003e\n\u003cli\u003eStroke: 17.20 mm\u003c\/li\u003e\n\u003cli\u003eOutput: 2.76 hp at 35,000 rpm\u003c\/li\u003e\n\u003cli\u003ePractical rpm range: 4,000–45,000 rpm\u003c\/li\u003e\n\u003cli\u003eWeight: 340 g\u003c\/li\u003e\n\u003cli\u003e7-port cylinder\u003c\/li\u003e\n\u003cli\u003eCrankshaft with 3 tungsten counterweights\u003c\/li\u003e\n\u003cli\u003e21M2 (B) carburettor\u003c\/li\u003e\n\u003cli\u003ef8.5 reducer included\u003c\/li\u003e\n\u003cli\u003eImproved cooling head based on the R2104 design\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIncluded accessories\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eRP7 glow plug\u003c\/li\u003e\n\u003cli\u003eExhaust gasket\u003c\/li\u003e\n\u003cli\u003eDust cap set – 3, 16 and 18 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eExhaust system\u003c\/h3\u003e\n\n\u003cp\u003eA combo set with exhaust system is also available. The TR01 set with EFRA2098 + MR02 is specially developed for European tracks with long straights.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0610\/9672\/2510\/files\/OS1DR00_7.jpg?v=1791015649\" width=\"250\" height=\"250\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0610\/9672\/2510\/files\/OS1DR00_8.jpg?v=1791015652\" width=\"250\" height=\"198\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0610\/9672\/2510\/files\/OS1DR00_9.jpg?v=1791015656\" width=\"250\" height=\"271\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0610\/9672\/2510\/files\/OS1DR00_10.jpg?v=1791015658\" width=\"250\" height=\"228\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0610\/9672\/2510\/files\/OS1DR00_11.jpg?v=1791015662\" width=\"250\" height=\"250\" alt=\"\"\u003e\u003c\/p\u003e","brand":"O.S.Engine","offers":[{"title":"Default Title","offer_id":42336255180878,"sku":"OS1DR00","price":3195.0,"currency_code":"DKK","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/9672\/2510\/files\/OS1DR00.jpg?v=1742603880","url":"https:\/\/hobbyviking.com\/products\/o-s-engine-1dr00-o-s-speed-r21-euro-ii","provider":"Fjernstyret.dk","version":"1.0","type":"link"}