{"product_id":"o-s-engines-max-b21-1-8-offroad-combo-w-pipe-manifold-副本","title":"O.S. Engines MAX-B21 1:8 Offroad\/GT Engine","description":"\u003cp\u003eMAX-B21 is easy to use from entry-level users to sports users and has excellent cost performance. Based on the O.S.SPEED series engine, it has a well-balanced combination of smooth speed and power delivery can be used in both on and off-road racing situations.\u003c\/p\u003e\n\u003cp\u003eThe outer head is based on MAX-21XR-B VER.3, it has been reduced weight for better performance. Also the shape of the combustion chamber of the inner head has been revised to improve combustion efficiency and response in the low speed range.\u003cbr\u003eIn addition, more stable idling, avoids stalling equals to easy carburetor adjustment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIncludes\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eP3 glow plug\u003c\/li\u003e\n\u003cli\u003eReducer 6mm(Orange) and 7mm(yellow)\u003c\/li\u003e\n\u003cli\u003eExhaust seal ring\u003c\/li\u003e\n\u003cli\u003eDust cap set 3mm\/16mm\/18mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDisplacement 3.49cc \/ 0.213 cu.in.\u003c\/li\u003e\n\u003cli\u003eBore 16.27mm \/ 0.641in.\u003c\/li\u003e\n\u003cli\u003eStroke 16.80mm \/ 0.661in.\u003c\/li\u003e\n\u003cli\u003eOutput 2.6ps \/ 2.56hp \/ 34,000r.p.m.\u003c\/li\u003e\n\u003cli\u003ePractical RPM range 4,000-41,000 r.p.m.\u003c\/li\u003e\n\u003cli\u003eEngine Weight 361g \/ 12.73oz.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tm_productinner tab-pane active\" id=\"moreinfo\"\u003e\u003c\/ul\u003e","brand":"O.S.","offers":[{"title":"Default Title","offer_id":45589330657420,"sku":null,"price":345.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0707\/2363\/3292\/files\/MAX-B21-1_ba068656-7c59-4afd-a8b1-fceb40416a0a.jpg?v=1767383757","url":"https:\/\/speedbull.net\/es\/products\/o-s-engines-max-b21-1-8-offroad-combo-w-pipe-manifold-%e5%89%af%e6%9c%ac","provider":"SPEEDBULL Rc","version":"1.0","type":"link"}