{"product_id":"ultimate-mxr-v3-ceramic-21-off-road-engine-team-edition-with-airmax-filter-ur3401-mr3x","title":"ULTIMATE - MXR v3 Ceramic .21 Off-Road Engine \"Team Edition\" with Airmax Filter (UR3401-MR3X)","description":"\u003cp\u003eThe Ultimate MXR v3 Ceramic is a .21 square-stroke competition engine for 1\/8 off-road, built by O.S. Engines on the Speed B21 platform. It delivers smooth low-end power for rough tracks, strong mid and top-end, and a reliable idle.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTeam Edition:\u003c\/strong\u003e fully run in at the factory on a monitored bench (temperature, RPM and time), with resistance torque measured to decide when run-in is complete. The engine is then stripped, inspected and rebuilt by the Ultimate race team, so it is ready to race straight out of the box with no track run-in needed.\u003c\/p\u003e\u003ch4\u003eFeatures\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBuilt by O.S. Engines on the square-stroke Speed B21 platform\u003c\/li\u003e\n\u003cli\u003eNew, less sensitive high-speed needle for easier tuning\u003c\/li\u003e\n\u003cli\u003eRevised crankcase internals for better fuel flow and efficiency\u003c\/li\u003e\n\u003cli\u003eRed CNC 7075-T6 aluminium backplate with larger fuel channels\u003c\/li\u003e\n\u003cli\u003e8-fin low-CG cooling head that directs air to the glow plug\u003c\/li\u003e\n\u003cli\u003eReworked sleeve and piston for more power without extra fuel use\u003c\/li\u003e\n\u003cli\u003eUltimate Airmax air filter set included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplacement:\u003c\/strong\u003e 3.49cc (.21)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e 2.65 PS @ 34,000 rpm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore x stroke:\u003c\/strong\u003e 16.40 x 16.40mm (square)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSleeve:\u003c\/strong\u003e 3 + 1 ports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrankshaft:\u003c\/strong\u003e 14mm, balanced with two tungsten weights\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarburettor:\u003c\/strong\u003e Modified O.S. 21J3 with exclusive needle and needle holder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVenturi:\u003c\/strong\u003e FlowMax 6.5mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearings:\u003c\/strong\u003e O.S. ceramic rear, Ultimate steel double-sealed front\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlow plug:\u003c\/strong\u003e P3 Turbo\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 345g\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eIn the box\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eUltimate MXR v3 Ceramic .21 engine\u003c\/li\u003e\n\u003cli\u003eUltimate Airmax air filter set\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eNeeded to complete\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eGlow plug (O.S. P3 Turbo recommended)\u003c\/li\u003e\n\u003cli\u003eNitro fuel\u003c\/li\u003e\n\u003cli\u003eClutch and flywheel to suit your car\u003c\/li\u003e\n\u003cli\u003eExhaust pipe and manifold\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003ePart number: UR3401-MR3X\u003c\/p\u003e","brand":"Ultimate Racing","offers":[{"title":"Default Title","offer_id":67779902767293,"sku":"UR3401-MR3X","price":999.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0575\/5571\/4237\/files\/sad_f27f7cb5-d2bc-45df-a05b-da8ab54a76b6.jpg?v=1792014366","url":"https:\/\/www.capitalrc.co.nz\/products\/ultimate-mxr-v3-ceramic-21-off-road-engine-team-edition-with-airmax-filter-ur3401-mr3x","provider":"Capital RC","version":"1.0","type":"link"}