O.S. Engine 12XZ(P) Race-Tuned On-Road Engine  [OSMG1990]

Track-Focused Power from O.S. Engine 12XZ

For 1/10 scale on-road racing, the O.S. Engine 12XZ delivers precision build quality and reliable output tailored to serious racers. This IFMAR-approved unit is engineered to perform consistently under race conditions.

Built to Deliver Strong Low-End Torque

The crankcase and liner port layout on the 12XZ has been refined to increase torque in the low- to mid-speed band. That extra punch improves acceleration off the line and through technical sections of the circuit.

Key Mechanical Enhancements

• Low-Friction Crankshaft: A dedicated coating lowers internal friction and wear, while the silicone-filled shaft smooths air and fuel flow into the engine.
• Precision Balance: Tungsten balancing weights are used to stabilise the rotating assembly at high revs for steadier operation.
• Optimized Cooling: The machined aluminum outer head has cutouts to reduce mass and enhance heat dissipation during long runs.

Carburetion and Ignition Details

The 12F(B) carburetor is matched to the engine's delivery profile and, together with the RP6 glow plug, supports efficient combustion across the practical rpm band of 5,000 to 44,000.

The O.S. Engine 12XZ is a compact, competition-minded powerplant that suits racers looking for a lighter engine with strong midrange performance and improved cooling for sustained track use.