This CN521 kit is fit for the following models:

2007 - 2009 125 KTM EXC,
2007 - 2015 125 KTM SX,
2007 - 2008 144 KTM SX,
2009 - 2015 150 KTM SX,
2010 - 2014 150 KTM XC

Big-end Width (mm) : 15.9
Small-end Width (mm) : 15.9
Big-end Bore (mm) : 28
Small-end Bore (mm) : 19
Center-to-center (mm) : 110
Pin Diameter (mm) : 22
Pin Length (mm) : 55
Big-end Bearing (mm) : 22*28*16
Small-end Bearing (mm) : 15*19*19.5
Washer Thickness (mm) : 1.0