{"product_id":"o-s-engine-os1fh01-os-speed-b21-adam-drake-off-road-t2090-combo","title":"O.S. Speed B21 Adam Drake 4 Off-Road \/T2090 Combo","description":"\u003cstrong\u003ePRODUCT INFO:\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eO.S.SPEED B21 ADAM DRAKE 4 - 3.5cc Off-Road Buggy Racing Engine - With T2090 Exhaust\u003cbr\u003e\u003c\/strong\u003e\u003cbr\u003eO.S. Engines would like to introduce new O.S.SPEED B21 ADAM DRAKE 4. The latest collaboration engine with world famous O.S. Team driver Adam Drake.\u003cbr\u003e\u003cbr\u003eThe cylinder liner, crankshaft \u0026amp; cooling head has been redesigned to Adam Drake’s spec for better balance, more torque and more power for better driving performance.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eMain changes (compared to AD3):\u003c\/strong\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003eCylinder liner: Revised port-design for more torque.\u003c\/li\u003e\n\u003cli\u003eCrankshaft: Inner diameter has changed for better low to mid end power.\u003c\/li\u003e\n\u003cli\u003eCombustion chamber: Redesigned for more torque\u003c\/li\u003e\n\u003cli\u003eOuter head: Extra fin for better cooling, reduced weight, lower center gravity for better balance and new laser design with double anodized colors.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cstrong\u003e\u003cbr\u003eFirst deliveries are expected in December 2025.\u003cbr\u003e\u003cbr\u003eSpecs:\u003c\/strong\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003eDisplacement: 3.49cc\u003c\/li\u003e\n\u003cli\u003eBore: 16.4mm\u003c\/li\u003e\n\u003cli\u003eStroke: 16.55mm\u003c\/li\u003e\n\u003cli\u003eOutput: 2.65ps \/ 2.61hp @ 34.000RPM\u003c\/li\u003e\n\u003cli\u003ePractical RPM range: 4.000-42.000\u003c\/li\u003e\n\u003cli\u003eEngine Weight: 352g\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cstrong\u003eIncluded:\u003c\/strong\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003eT2090 Exhaust Set: TB02 EFRA2089 Pipe \u0026amp; MB01-75 manifolder\u003c\/li\u003e\n\u003cli\u003eGlowplug: O.S.SPEED P3\u003c\/li\u003e\n\u003cli\u003eReducers: 6II (blue) AL2 \u0026amp; 8mm (blue) AL\u003c\/li\u003e\n\u003cli\u003eExhaust seal ring\u003c\/li\u003e\n\u003cli\u003eDust cap set: 3\/16\/18mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cimg src=\"\/img\/bilder\/artiklar\/zoom\/OS1FH00_8.jpg\" width=\"560\" height=\"561\" alt=\"\"\u003e\u003cbr\u003eAdvice and testing was done by Roar Champion Adam Drake.\u003cbr\u003e\u003cbr\u003e\u003cimg src=\"\/img\/bilder\/artiklar\/zoom\/OS1FH00_9.jpg\" width=\"560\" height=\"523\" alt=\"\"\u003e\u003cbr\u003eNewly designed cylinder liner uses 3 port design. Changing the exhaust dimension for more torque.\u003cbr\u003e\u003cbr\u003e\u003cimg src=\"\/img\/bilder\/artiklar\/zoom\/OS1FH00_10.jpg\" width=\"560\" height=\"490\" alt=\"\"\u003e\u003cbr\u003eChanged crankshaft’s inner diameter for better response in low to middle range.\u003cbr\u003e\u003cbr\u003e\u003cimg src=\"\/img\/bilder\/artiklar\/zoom\/OS1FH00_11.jpg\" width=\"560\" height=\"560\" alt=\"\"\u003e\u003cbr\u003eNew outer head has double anodized black and blue with new laser design and at same time lighter and better balance compared to the previous model.\u003cbr\u003e\u003cbr\u003e\u003cimg src=\"\/img\/bilder\/artiklar\/zoom\/OS1FH00_12.jpg\" width=\"560\" height=\"560\" alt=\"\"\u003e\u003cbr\u003eThe combustion chamber has been redesigned combustion efficiency has been improved, resulting in more torque.\u003cbr\u003e\u003cbr\u003e\u003cimg src=\"\/img\/bilder\/artiklar\/zoom\/OS1FH00_13.jpg\" width=\"560\" height=\"584\" alt=\"\"\u003e\u003cbr\u003eComes with φ6II and φ8 blue anodized restrictor venturis.","brand":"O.S.ENGINE","offers":[{"title":"Default Title","offer_id":43930773815374,"sku":"OS1FH01","price":3299.0,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/9672\/2510\/files\/OS1FH01_S.jpg?v=1783292191","url":"https:\/\/fjernstyret.dk\/products\/o-s-engine-os1fh01-os-speed-b21-adam-drake-off-road-t2090-combo","provider":"FjernstyretDK","version":"1.0","type":"link"}