Item 13 on first two pictures. Developed for racing engines to prevent the problem by making them from stainless steel.
KX125 1992 ENGINE CYLINDER STUDS GENUINE KAWASAKI 92004-1060 1992 KX 125 (A74)
KX125 1993 ENGINE CYLINDER STUDS GENUINE KAWASAKI 92004-1060 1993 KX 125 (A74)
KX125 1996 ENGINE CYLINDER STUDS GENUINE KAWASAKI 92004-1060 1996 KX 125 (A74)
KX250 1996 ENGINE CYLINDER STUDS GENUINE KAWASAKI 92004-1060 1996 KX 250 (A74)
Kawasaki H1 500 H2 750 KH500 Triple Fuel Tap Seal Repair Kit 5 pcs (1969 - 1976)
Brake Shoe for KAWASAKI H1-F 500 1975 Rear Right Hendler