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Deciding on Piston

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I'm nearing 50 hours on my 2009 yz250f and I'm going to go ahead and change my piston out. Im debating between the pro circuit high compression piston. And the Wiseco pro lite piston.

http://www.motosport.com/dirtbike/product/PRO-CIRCUIT-HIGH-COMPRESSION-PISTON-KIT/?prodId=913698&sMMY=YAMAHA%3BYZ250F%3B2009

http://www.motosport.com/dirtbike/product/WISECO-PROLITE-PISTON-KIT-4STROKE/?prodId=2543&

The reviews on the wiseco pro lite are not the best and i'm not sure what to choose.

Thanks?

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http://www.cppistons.com/

“Back when Carmichael started racing the RMZ450Z (four stroke) we began working with CP to develop a new type of piston to meet our demands while being lightweight and durable. As time went on and new designs kept getting better, stronger and lighter to the point where even our Japanese engineers have been impressed with the performance and durability. Today, from Chad Reed to Ryan Dungey, the whole team relies on CP Pistons and their latest technology.”

-Roger Decoster

Team Manger

Team Suzuki

MAX!!!

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Not trying to bash Pro Circuit but I bought one of their high compression pistons via Motosports a couple of years ago and thankfully they allowed me to return it. It was a work of art but it had a couple of extra ribs added for strength that made it extremely heavy. Seems like when these new four strokes came out a lot of piston manufacturers were making the pistons heavier to prevent breaking. Of course, the heavier is it the more stress it will need to endure. Myself, I've been using a CP piston and it's been good.

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Nope thats why its great. 13.5:1 is what ya want.. stronger and lasts longer than stock. noticably better response, and gives some more over rev and stuff. it does run a little hotter tho.. not much but if you have a temp strip you will be able to see. 91 - 93 pump

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