Vertex Piston Kit Vertex 54.0 D Yamaha YZ/WR 125 05-21, Vertex 23119d Fantic Xe/

All pistons are heat treated with a T-5 or T-6 hardening and tempering cycle. - Made in Italy. - Fitted in many oem bikes as STD. SPECIFICATION: BORE SIZE. 53010005400 Pin. 72071 Cross reference numbers ONLY.

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