Piston help!

[Bigd0g]

Hey guys i just cracked my piston on my 06 yfz450. I am looking at a new high comp piston do you recomend any good pistons? I am kinda looking at the JE 13:1 high comp piston but its back orderd to nov 27. Thx guys

[Ride1Rob]

Where did you crack the piston? Top or underneath on the bottom?

[Bigd0g]

I cracked it up top i think i have over 50h on that piston.

[Ride1Rob]

With only 50 hours it shouldn't have done that. Your jetting is a tad bit too lean. Not lean enough where it burnt a hole in the piston, but lean enough that in only 50 hours of riding it cracked. When you get it back together check your plug. It should have a brown color to it. Not black (too rich) and not white/gray (too lean).

http://img3.uploadhouse.com/fileuploads/2968/2968723bb9764c794161fb11874029d0e870805.jpg (http://www.uploadhouse.com/viewfile.php?id=2968723&showlnk=0)

[daddio]

I have had real good luck with wiseco.