KB Performance Motorcycle 96 Inch To 103 Inch Big Bore Piston Set - +.030 Inch
For 96" to 103" (3 3/4" to 3 7/8") big bore conversions. 10.0:1 CR with 85cc head. Head type: Flat top. +1.9cc / Compression height 1.076". Bore 3.875" / Stroke 4.375". Rod length 7.667". See instructions.