Bultaco 125 TSS, Sherpa, Streaker, Pursang, Wiseco 406P8 Piston , 2mm over
US$89.99
Bultaco 125CC TSS Sherpa, Streaker, Pursang.
WISECO 406P8 PISTON W/RINGS & CIRCLIPS
52.50mm / .080 OVERBORE / 2mm
May fit other models, please research before purchasing