1st oversize pistons genuine for 2A2 XS400 piston rings also included but I’m not 100% they are genuine. They are part numbered for 1st oversize though so will fit fine Rare parts to find these days
Yamaha XS400 2A2 Piston Rings Standard Size - 2A2-11610-00
Yamaha XS400 XS 400 OHC 2A2 Piston Kit - Oversize +0.25mm Piston Rings Piston
Connection Intake Rubber Yamaha XS400 1979 3N7 Carb - Air Box Joint 90413-40005
Hiflofiltro Oil Filter Fits Yamaha XS400 C,D,E,F,G,H,J,K 1977-1983
Ignition Coil x2 Yamaha XS400 1977-1983 / XS650 1975-1979 / XS360 1976
Yamaha XS400 82 12E Spare Parts List Microfiche (Mar 82)
