At Reds Racing, we take pride in pushing the limits of innovation and developing cutting-edge technology. That’s why we’re thrilled to introduce our latest evolution: the 921 Speciale™ competition engine for the off-road category!
As always, Reds Racing stays at the forefront of technology, and this time we’ve taken things a step further. The 921 Speciale™ is a limited-edition engine featuring:
A completely redesigned 9-port cylinder to guarantee extremely linear torque
Excellent fuel efficiency , further optimized compared to our 7-port design
Even more torque with impressive power output
At the same time, it’s extremely drivable and easy to manage on the track
This engine represents the next level of performance, combining power, efficiency, and drivability in a unique special edition package.
New 9-port Cylinder: Higher performance, excellent fuel efficiency, great drivability with more torque
RTX Rotating Backplate: Reduces friction between the connecting rod and backplate, improving stability at idle, boosting engine power, and optimizing fuel efficiency for extended runtime
High-Protection Bearings: Includes a double-seal front bearing for durability and stability, along with a 9-ball rear ceramic bearing for reliability under extreme conditions
Balanced DLC Crankshaft
AVAILABLE MODELS
TECHNICAL SPECIFICATIONS
Displacement [cm³] | |
Stroke [mm] | |
Inlet Ports | |
Outlet Ports | |
Front Bearing | 7x19x6 Double Seal |
Rear Bearing | 14×25.4×6 9 Balls High-Durability Ceramic |
Carburetor Diameter [mm] | 7.0 (Options: 6.0, 6.5, 7.5, 8.0) |
Carburetor Type | VCX3-A Aluminum Short Needle |
Weight [g] | |
Fuel Consumption [min] | |
Operating Temperature [°C] |
To maximize the performance of your 921 Speciale™ engine, we recommend pairing it with:
Glow Plug: REDS TS4
Exhaust System: 2143 X-ONE High Torque Plus Pipe
Fuel: 16–30% nitro, 8–10% oil
Break-In Fuel: 12% oil
