509 pistons are the same spec as the 364 etc

[Freakshow]

just checking 509 - pistons are the same as the 364 yams aent they.

ok let me clarify they fit MX 250 pre 73/74 as well right

[cyclegod]

364 piston have two holes for the torque induction whereas the 509's has that section cut away

73-74 http://cgi.ebay.com/ebaymotors/Yamaha-DT2MX-MX250-Piston-Standard-STD-NEW-NOS_W0QQcmdZViewItemQQ_trksidZp3286Q2em20Q2el1116QQhashZitem2ea4bfa92dQQitemZ200332519725QQptZMotorcyclesQ5fPartsQ5fAccessories

75-77 http://cgi.ebay.com/ebaymotors/NOS-Yamaha-Piston-50-76-77-YZ250-75-MX250-509-11636-01_W0QQcmdZViewItemQQ_trkparmsZ66Q3a4Q7c65Q3a1Q7c39Q3a1Q7c240Q3a1318Q7c301Q3a1Q7c293Q3a1Q7c294Q3a200QQ_trksidZp3286Q2ec0Q2em14QQhashZitem2c4ce67935QQitemZ190268733749QQptZMotorcyclesQ5fPartsQ5fAccessories

but they both work in either machine

[Freakshow]

thats what i thought, so they have the same cut away as the yz etx, but the pins and heghts etc are all the same ? no tweeking required.