This is our new performance part, Cylinder Head with bigger valve size and CNC ported
Available in two size, 31-25mm and 34-29mm valve size
31/25 works best with 63mm piston (170cc kit) and the 34/29 works with piston 66mm size and up
Please note that the 63mm piston will not works with the 34/29 size
You may Contact Us if you have any questions about this item
Comes complete with new valve springs, valve seals, collets, top and bottom retainers specifically for this performance head
We also have other performance parts for KLX140 / KLX150 all years and we can customize performance parts based on buyer request.