Motorcycle Piston Ring For Yamaha DT200 DT200R 1988-1991 +25 +50 +75 +100 Bore Standard 66mm Fit For Yamaha DT200 DT200R 1988-1991 two stroke engine, available in standard 66mm +25 +50 +75 +100 oversize bore specifications cast ring profile cylinder bore dimensions ; fits piston grooves seamlessly without filing or ductile construction with anti wear surface coating; reduces cylinder wall abrasion during trail off road riding Optimized tension design maintains consistent compression; power loss blow by excess two stroke oil consumption Complete ring set including compression ring oil control ring; for engine rebuild bore resizing projects