piston 3d model

A realistic forged aluminum piston for a 70 mm bore motorcycle engine, designed for a CG-style engine. Specifications: - Bore diameter: 70 mm. - Wrist pin diameter: 18 mm. - Compression height: around 33 mm. - Skirt length: about 58 mm. - Three piston ring grooves (two compression, one oil). Special clearances: - Valve reliefs on the piston crown: two shallow curved recesses to prevent contact with intake and exhaust valves. - Wrist pin hole: 18 mm diameter, with internal recess for the connecting rod small end. - Circlip grooves on both sides of the wrist pin hole to secure the pin (snap ring slots). - Slight dome on top for higher compression, but with valve pockets clearly visible. Style: - CNC-machined details. - Forged aluminum look. - Realistic mechanical design suitable for a racing CG engine piston.