461S1600 M16 Spring Washer Stainless Steel JIS
Made in Japan.
d=ID 16.2mm +0.5
D=OD 28.0mm -0.5
Thickness 3.5mm
Max Thickness 8.3mm 
Kawasaki part number is for reference only, 
this is a Genuine JIS washer from our supplier in Japan.
Ideal replacement to the original
Equivalent to Kawasaki Part 461S1600