PISTON + PIN (Square Bowl)->10 / 2002 Premium

IZUMI Brand ()
Number on crown: 8420 or 6510 or 6511
Square shaped combustion bowl
Crown features 1 x valve relief

Partners ring pack ref PR2068 (4 ring type piston)
Top ring: 4mm (Keystone profile)
2nd ring: 3mm
3rd ring: 3mm
Oil ring: 4mm
Top + 2nd Ring Grooves: Alfin reinforced

Oil gallery cooled crown
Skirt length: 127.6 mm
Compression height: 75 mm
Combustion Bowl width: 66.0mm x 66.0mm
Combustion Bowl depth: 22mm (flat bottom)
Gudgeon Pin diameter: 43mm