NEU! O.S. SPEED R21 SHIMO EDITION 3 Combo, pre-order mid January

O.S. Engines would like to introduce all new O.S. SPEED R21 SHIMO EDITION 3.

Latest collaboration engine with O.S. Team driver Takaaki Shimo.

Only combo set is available.　

Combo set comes with TR03 EFRA2196+MR05

Code number : 1FG01

We will be start shipping 1FG01 starting January 2026.

With additional treatment of piston and new matching cylinder will provide longer life than previous 9-port

There are changes on the crank case to adapt spacer(s) provided on the exhaust section.

Depending on the tracks and conditions, drivers can choose to use spacer(s) to change the performance of the engine.

We apply Ceramic ball for the rear bearing for better performance.

For the dust cover, to avoid fuel leakage and air in the line with “Dust cover ring”.

Outer head’s all new design fins with improved heat management.