Always the correct part
Beach RC says....
O.S. SPEED T1204 is the successor of T1203 which is the World Champion engine in 2018. The 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 ensures powerful performance in middle range. The cooling head with wider fin pitch improves cooling efficiency.
|Bore||0.538" (14 mm)|
|Displacement||0.128 cu in (2.1cc)|
|Engine (Only) Weight||0.5138lbs (233g)|
|Engine Size||0.128 cu in (2.1cc)|
|Plug Type||O.S. RP6 Turbo|
|Product Height||2.679" (68 mm)|
|Product Length||3.125" (79 mm)|
|Product Width||1.53" (39 mm)|
|RPM Range||5,000?45,000 r.p.m.|