Tri Z piston identification

[vrswiss]

Can anyone please tell me how far over my cylinder has been bored by the markings on this piston? 3 over? Anymore room to be bored again if needed? I plan on taking it in to a good machine shop, someone familiar with 2 strokes. Just need to find said shop. The cylinder looks pretty good but the history of this Z I am rebuilding is unknown. Thanks

http://i67.photobucket.com/albums/h298/whitebirdrocks/85%20TRI-Z/DSC02037.jpg

[DixiePlowboy]

Looks like .75 over, which is the 3rd overbore.

[vrswiss]

Does that look like a stock Yamaha oversized piston? Anyway to tell incase I just need to replace the rings? The piston actually looks really good and not very old

[rdlsz24]

Wiseco

Wiseco Piston for Yamaha Tri Z 250. .030 oversize 515P3 68.75 mm Bore x 68 mm Stroke

Rob

[vrswiss]

Wiseco

Wiseco Piston for Yamaha Tri Z 250. .030 oversize 515P3 68.75 mm Bore x 68 mm Stroke

Rob


Right on Rob. Thats what I needed to know :beer Thanks