All ATHENA products, which are manufactured with higher displacement and power than those permitted by law of the country where the end user lives, are intended solely for competition-sports usage. Use on public roads as well as in aeronautics and marine is prohibited. ATHENA is not responsible for any different usage.The customer takes full responsibility that the distribution of the articles purchased from Athena is in line with the current regulations of his country and therefore frees Athena from whatever responsability in this matter.

Features:

• Includes a specially designed gasket kit to accommodate the big bore features
• Each kit also includes easy-to-follow step-by-step installation instructions

Note: To assemble the cylinder kit YZ 144,you need to make the boring of the engine crankcase.