Supersprox Kawasaki KXF450 06-On Front Sprocket . 
Fully lightened with radial holes.
Ultra-hard surface layer reduces friction to prevent power-loss caused by chain drag.
Grooved teeth maximize sprocket life by preventing dirt build-up.
Made from SCM-435 Carbon Free steel and carbon impregnated.
Made in Europe
The refined core structure ensures that the teeth will not break when worn, like cheap C-45 sprockets.