Pro X High Compression Piston Kit

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Product Details
Customer Reviews
Videos (4)

13.5:1 Compression
Stock compression 12:1
Machined from low-expansion, low-friction alloy, the same used by Japanese o.e.m. engine manufacturers.
All Pro X piston kits come complete with Piston, Rings, Wrist Pin and Circlips, ready to install.

Pro X High Compression Piston Kit Reviews

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Displaying 6 of 6 reviews

0 of 0 people found this review helpful.

No instructions

Ryan in PA

Comments On Oct 23, 2012:This piston worked great but it comes with a copper/gold looking ring and a black ring and didnt say what ring goes where, the copper/gold closest to the top of the piston then black then the small one then the wrinkle oil ring then the other thin silver ring was so hard to figure out which on went where. Other than that, great product

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0 of 0 people found this review helpful.

2008 YZ250F

Kyle in BC

Comments On Dec 14, 2010:This piston has held up great. My YZ has hot cams and a hot rod crank and this piston completed my build. Bike pulls hard at all RPM's and has over 40 hours and still measures up great on the leak down tester. Would buy again if mine wears out but so far no need.

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1 of 1 people found this review helpful.

I would not purchase again

mike in NH

Comments On Jul 05, 2010:It's probably a good piston if you don't race. But for racing it didn't take long before the top ring was seized to the piston. Check your other options before getting this one.

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0 of 0 people found this review helpful.

love it

glenn in SC

Comments On May 05, 2010:fits great, runs great, lot faster than stock, it just feels like i lost a little bottom end power but i couldnt be more happy with this product

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2 of 2 people found this review helpful.

Great Piston

andrew in NE

Comments On Sep 08, 2009:I just put this in my 2004 YZ 250F when I got it back it seemed like a brand new bike only with more power! The front end came up on me in 3rd gear! Now thats what I call power! GREAT VALUE!!! GET IT!

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