Wiseco Pro Lite Piston Kit 67.00mm Lightweight forging for instant throttle response and maximum torque . Computer engineered piston skirt profiles provide minimal cylinder wall friction . Piston kit includes piston, rings, wristpin and circlips. Specs: Oversize: Standard Bore Size: 67.00mm Compression Ratio: Standard Fits the following models: SUZUKI RM250 1989 - 1995 SUZUKI RMX250 1989 - 1998