ATHENA racing 144cc kit for Yamaha YZ 125 motorcycle from 2005 to 2018

Here is the best way to reliably upgrade your Yamaha YZ 125 - 2005/2018 from 32.6hp to 37.6hp!

The ATHENA BIG BORE with its large diameter of 58mm offers a good performance and torque gain over the entire range to your YZ 2T.

The kit consists of a very reliable ATHENA nicasil treated aluminum cylinder with corrected diagrams. A VERTEX graphite piston forged mono-segment steel.

It comes with screws and gaskets as well as the instructions! Complete as in the photo.

As an option we offer you a stage 1 preparation, this preparation is a modification of the channels and the exhaust port by increasing the diagrams and improving the duct, it increases the performance of the cylinder. An improvement to the piston and the bottom of the skirt is also included in this modification. Allow a little extra time for this preparation!

Mounts on Yamaha YZ 125 from 2005 to 2018!