{"product_id":"os-engine-os-speed-r21-euro-3-on-road-combo-set","title":"OS ENGINE OS SPEED R21 Euro 3 On-Road Combo Set","description":"\u003ch2\u003e\u003cspan dir=\"auto\"\u003eOSSPEED R21 Euro 3 Combo Set\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003eThe R21 Euro 3 Combo Set is a complete package for 1\/8 on-road vehicles. The engine is supplied together with the TR03 tuned pipe (EFRA 2196) and the MR05 header, so the engine and exhaust system are perfectly matched right from the factory.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003eThe R21 Euro 3 is the next step in OS Engines' successful R21 series. It builds on proven components from the Euro 2 and R2106. Pistons and cylinder liners, combustion chamber, and carburetors have been newly developed, focusing on throttle response, thermal management, and reliability. The result is an engine that responds instantly and delivers consistent performance, run after run.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan dir=\"auto\"\u003eCrankcase with ceramic bearings\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003eThe engine uses the proven crankcase of the R21 Euro 2 with ceramic ball bearings. This ensures low friction, high revving capability and a long service life.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan dir=\"auto\"\u003eR2105 crankshaft with tungsten weights\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003eThe R2105's crankshaft has two tungsten counterweights (Ø 4.5 mm). They optimize the balance and ensure noticeably sharper throttle response when exiting corners.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan dir=\"auto\"\u003eNewly developed piston \u0026amp; cylinder liner\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003eThe cylinder liner features a newly developed design with excellent balance across the entire rev range. The piston is the same as that of the R2106, but has been specially treated to be more resistant to seizing. This translates to greater reserves when the engine is working hard.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan dir=\"auto\"\u003eCombustion chamber with redesigned cooling fins\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003eThe combustion chamber cooling fins have been redesigned for improved heat dissipation. This allows the engine to maintain a more stable operating temperature throughout the race.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan dir=\"auto\"\u003eCooling head with new laser logo\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003eThe cooling head retains OS SPEED's typical black color, now with a redesigned laser-engraved logo.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan dir=\"auto\"\u003eCarburetor 21M5(B) with dust protection ring\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003eThe carburetor has a dust cover with a dust protection ring. This prevents fuel leakage and air from entering the fuel line, resulting in smoother and more predictable engine performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan dir=\"auto\"\u003eProven technology from the R2106\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003eAll other internal components are identical to the R2106. This means proven reliability and a good supply of spare parts.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan dir=\"auto\"\u003eHighlights\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan dir=\"auto\"\u003eComplete package including resonance pipe TR03 (EFRA 2196) and manifold MR05\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan dir=\"auto\"\u003eCeramic ball bearings for low friction and long service life\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan dir=\"auto\"\u003eCrankshaft with tungsten weights for faster throttle response\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan dir=\"auto\"\u003eNew cylinder liner and specially treated piston with increased protection against seizing.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan dir=\"auto\"\u003eImproved heat management through new cooling fins on the combustion chamber\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan dir=\"auto\"\u003eCarburetor with dust protection ring to prevent fuel leakage and air in the fuel line\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan dir=\"auto\"\u003eShared parts with R2106 and R21 Euro 2\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan dir=\"auto\"\u003eScope of delivery\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan dir=\"auto\"\u003eOSSPEED R21 Euro 3 engine\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan dir=\"auto\"\u003eResonance tube TR03 EFRA2196\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan dir=\"auto\"\u003eManifold MR05\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ryeskovracing.dk","offers":[{"title":"Default Title","offer_id":53250978087223,"sku":"OS1FP01","price":3940.0,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0912\/2142\/6487\/files\/os_v3.png?v=1791902227","url":"https:\/\/ryeskovracing.dk\/products\/os-engine-os-speed-r21-euro-3-on-road-combo-set","provider":"ryeskovracing.dk","version":"1.0","type":"link"}