FX Royal Racing Engines 5K DC .21 5-Port Off-Road Buggy Engine w/Ceramic Bearings (Turbo Plug)

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This is the FX Royal Racing Engines 5K DC .21 5-Port Off-Road Competition Buggy Engine. The FX Engine is a high-precision, high performance nitro engine intended for competitive off-road vehicle use. All the finest engineering and craftsmanship has gone into the concept, design, creation and finishing work of the FX Engine.

This engine and all of its parts were designed and manufactured by FX in-house in Slovakia, Europe from all the finest European materials and using the most advanced Swiss German technologies. Even the crankcase was die cast in house using a fully robotic die casting technology. All the products are individually measured and inspected and all of the important dimensions of every part are recorded so there is a full record of every single part being manufactured and assembled. The engine even includes an engine birth certificate which shows all the important serial numbers and measurements so that, at anytime, all details of the production including the batch of material, machine programs, responsible craft persons and production dates can be tracked back to its roots.


  • 5-Port Competition High Performance Power
  • Ceramic Main and Rear Bearings
  • 14mm High Precision Crankshaft 
  • CNC Machined Silicium Piston
  • Every Part Designed and Manufactured in Slovakia, Europe
  • Engine Birth Certificate Included

Bore: 16.26mm
Stroke: 16.80mm
Weight: 349g
Max. Power: 2.65 HP @ 33,000 RPM
Practical Range: 4,000-39,000 RPM
Ports: 5 Transfer Ports
Piston: CNC Machined Silicium
Sleeve: CNC Machined Brass, Hard Chrome Plated
Front Ball Bearing: 7x19mm Ceramic
Rear Ball Bearing: 14x25.8mm Ceramic
Crankshaft: 14mm
Carburetor: Alloy Body w/ Thermal Isolation; 3-needle w/ Modular Venturi
Glowplug Type: X3
Exhaust Position: Rear


  • (1) X3 Glow Plug
  • (1) Exhaust Gasket
  • (1) Cylinder-head Shim
  • (1) Carburetor Venturi
  • (1) 3mm Dust Cap
  • (1) 6mm Dust Cap
  • (1) 16mm Dust Cap
  • (1) 18mm Dust Cap

This product was added to our catalog on September 4, 2013.

Louis Thomas
Verified Owner
All I can say is that this is what we have come to expect from one of the greatest innovators of our time,there is no let down here with and unreal product that far exceeds anything on the current market.Ok believe me when I say this engine is perfection pure reliability power and efficiency!!! Thirteen years of nitro racing and I've never seen or experienced any thing like it.
Merdith Roach
When this engine came out my buddy just had to have one, well, I had to get my hands on one and break it in and run it a bit. All I can say is wow, this engine is fantastic. First it's one of the most well put together and designed engines I've ever seen. Second this thing has tons of torque more midrange than you can handle, and a very nice top end. A bit of a difficult engine to break in. It's very tight and keeps compression for about a full gallon. Be patient with this engine although don't wear it out driving around in circles for eternity. That's just silly. Put it on the track at about 1/2 gallon. I can see this engine lasting a very long time. Oh yeah it's super easy to tune once you mess with it for a little while getting to know it so to speak. I honestly think this is the fastest stock engine on the market. Sure those 7 ports have a couple more rpm, but overall where it counts they can't touch this work of art.

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