Wiseco Piston Standard Yamaha YTZ250 Tri-Z 1985 515M06800

A worn or damaged piston compromises engine efficiency, throttle response, and overall reliability—especially critical for serious riders pushing their YTZ 250 Tri-Z to its limits. The Wiseco piston restores lost performance through precision engineering and high-silicon aluminum construction, delivering consistent power and durability across demanding riding conditions. This is a direct, bolt-in replacement that demands no special fabrication.

The high-silicon aluminum alloy resists deformation under load, maintaining proper ring seal and combustion efficiency over extended use. The forging process Wiseco employs distributes material strategically to strengthen critical zones while reducing reciprocating mass—translating to quicker throttle response and improved acceleration. At 68.00 mm bore, this piston is purpose-built for your engine's displacement and geometry, ensuring optimal fit without compromise.

• Bore diameter: 68.00 mm
• Material: High-silicon aluminum alloy
• Forged construction
• Fits: Yamaha IT 250 (1983); YTZ 250 Tri-Z (1985–1986)
• Precision-engineered ring grooves
• Enhanced combustion efficiency
• Improved throttle response
• Bolt-in replacement
• MPN: 515M06800