Wiseco PK1533 2-Stroke Piston Kit 72mm +2mm Overbore for Suzuki LT250R QuadRacer

The Wiseco PK1533 is a complete top-end piston kit designed for the 1985–1986 Suzuki LT250R QuadRacer ATV. This kit features a 72.00mm bore (534M designation), representing a +2mm overbore over the standard 70.00mm bore, making it ideal for top-end rebuilds or cylinder overbore projects. The engine displacement with this bore size is approximately 257cc, and the stroke measures 64.80mm. This is a liquid-cooled application; stock thrust washers must be used during installation.

Kit Contents:

• Forged aluminum piston (72.00mm)
• Ring set – Part# 2835CD (72.00mm)
• Wrist pin – Part# S513 (18mm x 2.3031", unchroomed)
• Round wire pin locks – Part# CW18 (18mm pair)
• Top-end gasket set

Why Wiseco Forged Pistons?

• Forged from high-silicon, low-expansion aluminum for superior strength, reduced weight, improved heat transfer, and longer service life
• CNC diamond-turned finish guarantees precise sizing with no variation
• Forged construction aligns grain flow for higher resistance to impact and fatigue compared to brittle cast alternatives
• All pistons forged and tooled in the USA, with full manufacturing control from raw bar to skirt coating
• Compatible with all modern cylinder bore compositions

Wiseco engineered the PK1533 using 3D design techniques and finite element modeling to deliver the optimal strength-to-weight ratio for the demanding two-stroke ATV environment. Whether you're rebuilding a worn top end or stepping up to an overbore, this kit provides everything needed for a complete, performance-grade piston installation.