O.S. SPEED T1204 is the successor of T1203 which is the World Champion engine in 2018. O.S. Engines T1204 has more toque in low-middle range with better performance. Two tungsten weights are embedded in the counterweight of the newly designed crankshaft, which helps powerful performance in the middle range. The cooling head with wider fin pitch improves cooling efficiency.
 
Features:
 
New crankshaft contributes better performance in the middle range
Inner head o-ring prevents dust from coming into the combustion chamber
Cooling head with wider fin pitch improves cooling efficiency