Piston Rings Fit For Suzuki 66MM Bore Durable Kit DR200 DR200SE DR200S SP200 +25 +50 Motorcycle Set DR200 DR 200 86-91 SP200 86-88 DR200SE 96-13 DR200S 15-17;serves as oversize engine piston ring replacement assembly cylinder inner 66mm bore space;aligns piston ring grooves for direct installation without extra grinding Tight ring clearance controls oil consumption;maintains steady compression power in speed riding Made of dense material; cut ring surface to reduce friction loss inside cylinder Supports +25 +50 oversize specifications;all ring pieces follow unified 66mm bore measurement standards