.21 Nitro Engines

The Reds Racing 6.5mm Gen 2 Carburetor Venturi guarantees improved fuel mileage and higher torque. The innovative design improves carburetor fluid dynamics for even better tuning stability. The GEN2 venturi is available in 6.0, 6.5, 7.0 and 7.5mm...

Spower's new factory-modified engine series: "魂II" (SOUL II)   Following the impressive success of the original SOUL B7HP factory-modified off-road racing engine, Spower has taken the next step with the B7HP SOUL II. Based on the long-stroke B7HP...

The SPower S6TT "Dark Edition" is the next step in the development of the successful S6TT. This special edition impresses with improved stationary operation and vibration-reduced running behavior in the high speed range. Of course, it has all the...

Celebrate Davide Ongaro's incredible achievement with this commemorative 1/8 off-road buggy engine, marking his third consecutive world championship victory and his second with O.S. Speed. This special edition, based on the O.S. Speed B2105, embodies...

Robert Batlle & Ultimate Racing: A Legendary Partnership That Keeps Making HistoryRobert Batlle, one of the most iconic names in the world of RC, is also the longest-standing driver on the Ultimate Racing team. As he puts it:“Over 25 years...

This is the Ultimate MXR v2 Ceramic 3 Transfer .21 Competition Engine with Ultimate Airmax Filter. Like its predecessor the MXR, this engine is manufactured by the prestigious Japanese brand O.S. Engines, and it’s also based on their square stroke...

This is the Ultimate MXR v2 Ceramic 3 Transfer .21 Competition Engine with Ultimate Airmax Filter. Like its predecessor the MXR, this engine is manufactured by the prestigious Japanese brand O.S. Engines, and it’s also based on their square stroke...

This is the MXR v2 "Team Edition" engine with Airmax Filter from Ultimate Racing. The "Team Edition" concept uses the same Ultimate engines that are for sale, but the engines are assembled directly in our factory, completely broken-in and then thoroughly...

This is the Ultimate MXR v2 Ceramic 3 Transfer .21 Competition Engine with Ultimate Airmax Filter. Like its predecessor the MXR, this engine is manufactured by the prestigious Japanese brand O.S. Engines, and it’s also based on their square stroke...

ProTek R/C is Delighted to announce the arrival of the astounding Samurai RM.1 Maifield Edition 3-Port .21 Competition Nitro Engine with increased fuel mileage by nearly 60 seconds. Designed in collaboration with legendary R/C Racer "Ryan Maifield" who...

This is the MXZ "Team Edition" engine with Airmax Filter from Ultimate Racing. The "Team Edition" concept uses the same Ultimate engines that are for sale, but the engines are assembled directly in our factory, completely broken-in and then thoroughly...

This is the Ultimate MXZ 3 Transfers Long Stroke .21 Engine with the Ultimate Airmax Air Filter. This engine is manufactured by the prestigious Japanese brand O.S. Engines, with the following characteristics: Cooling Head The MXZ is...

The latest Spower Japan B7TT SPEED Factory Tuned .21 Racing Engines are tested and carefully selected to give you maximum performance and run time. It is a long-stroke engine that offers quick response at low speeds and more torque in the mid end with...

  The O.S. 21XR-B Ver.2 club-level nitro GT and off-road engine.The power plant targets club level drivers and it features the 21J3 3-needle carburettor with 7mm and 8mm venturi inserts.Tech...

Spower’s new factory hand modified, pre broken in  engine series called “魂”(SOUL) This hand modified top performance engine is pre broken in too, which brings maximum performance and durability out of the box.Continue the first...

This is the Carburetor Dust Cover from Ultimate Racing. This ring has been designed to guarantee the best sealing of the carburetor. Made of 7075 aluminum anodized in red color and laser engraved. Intended for the Ultimate MXS and MTS carburetors, or...

Specifications: Displacement: 3.49cc / 0.213cu.in Bore: 16.27mm / 0.646in. Output: 2.68ps / 2.64hp /34,000r.p.m. Practical RPM range: 4,000～42,000r.p.m. Engine Weight: 345g / 12.17oz. Pipe: TB02 EFRA2089＆ MB01-75   Includes: P3...

Introducing new RONDA DRAKE EDITION 2 produced by Ronda Drake, the wife of world renowned professional racer, Adam Drake. The newly designed outer head has improved performance by reducing weight and lowering the center of gravity, adopting...

Displacement: 3,49cc / 0.213 cu.in.Bore: 15,94 mmStroke: 17,50 mmWeight: 350 gr.Head Diam. : 59,50 mmOperating range: 4.000 – 45.000 rpmVacuum high pression injected CrankcaseLightened Crankshaft5 Ports cilinder with antifriction HCP...

Displacement: 3,49cc / 0.213 cu.in.Bore: 15,94 mmStroke: 17,50 mmWeight: 350 gr.Head Diam. : 59,50 mmOperating range: 4.000 – 45.000 rpmVacuum high pression injected CrankcaseLightened Crankshaft DLC coated3 Ports cilinder with...

Features Newly designed cooling head; 3mm lower height for low gravity and 14g lighter. Black/blue double anodized head. Back plate with steel lining like B2104 for friction resistance New crankcase inner...

Features Newly designed cooling head; 3mm lower height for low gravity and 14g lighter. Black/blue double anodized head. Back plate with steel lining like B2104 for friction resistance New crankcase inner design for linear...

Spower Japan B7TT Factory Tuned .21 Racing Engine

Beach RC says... This is the high speed ceramic rear engine bearing measuring 14X25.8X6 mm by Ultimate Racing meant for Ultimate engines