The engine is brand new from the original factory and the buyer must run in after receiving the product. Since the idling oil needle has been set for shipment, it is only necessary to adjust the main oil needle and the auxiliary oil needle after receiving the product to start. Specifications Displacement: 2.74cc Speed: 28000rpm Power: 1.0hp Piston Diameter: 15.9mm / 0.626in. Piston Stroke: 14.7mm / 0.579in. Net Weight: 280g / 9.88oz KT18 Engine - RED Redcat KT18 LIGHTNING STR,SHOCKWAVE,TORNADO BB,TSUNAMI (nitro),VOLCANO STX,VOLCANO SV Kingtair KT18 Engine 2.74cc RC 1/10 Nitro Car On-road Car Buggy Monster Bigfoot Truck for KYOSHO FW06 FW05 HPI HSP 94122 / 94177 / 94188