Wiseco 97 04 Yamaha GP1200 (757M08550) Piston Kit Blue lupine flowers bloom. California, USA Stock Photo Alamy. Classic Forged 2 stroke pistons are perfect for those looking to rebuild their 2 stroke engine with reliable, high quality components. These pistons cover a wide range of Powersports rebuilds, including vintage motocross models, classic street bikes, and snowmobiles. The forged material improves tensile strength over cast pistons, ensuring refreshed performance on the track or the trail. This Part Fits: Year Make Model Submodel 1997 1999 Yamaha GP1200 WaveRunner GP1200 Base 1999 2004 Yamaha SV1200 WaveRunner SUV1200 Base 1998 Yamaha XL1200 WaveRunner XL1200 Base