This CN521-1 kit is fit for the following models:

2016 - 2018 KTM SX125,
2016 - 2018 KTM EXC125,
2016 - 2018 KTM SX150,

We apply nickel-contained chromoly steel, a higher strength material, for our con-rods. The rod can bear higher loading and higher RPM environment. 

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): 56
Big-end Bearing (mm): 22*28*16
Small-end Bearing (mm): 15*19*19.5
Washer Thickness (mm): 1.0