After the preview of last month, the Japanese OS has officially revealed features and release dates of the forthcoming Speed T-1203 and R21 Euro Spec engines (both designed for on-road racing). The R21 Euro Spec engine, designed for high-speed tracks by changing the crankshaft and cylinder / piston port timing and it features a new cooling head design, will be available this month. It will be sold as a combo set with the M2001SC manifold and T-2080SC exhaust.

The Speed T-1203 engine, based on the T-1202, provides better energy efficiency and more torque up to the low average speed range, even on the high-bite road surface.  This new engine will be available with or without the T-1070SC exhaust and M1006SC manifold. It will arrive on the shelves in the first weeks of 2019.

R21 Euro main features:

• Displacement: 3.49 cm3
• Bore: 16,08 mm
• Stroke: 17.20 mm
• Practical range RPM: 4,000 – 45,000 rpm.
• Power: 2.8 ps / 2.76 hp / 33,000 rpm
• Weight: 340 g

Speed T-1203 main features:

• Displacement: 2.10 cc
• Bore: 13.67 mm
• Stroke: 14.3 mm
• Practical range RPM: 5,000 – 45,000 rpm.
• Power: 1,75 ps / 1,73 hp / 35,000 rpm
• Weight: 230 g

Source: osengines.com