Pro X High Compression Piston Kit

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Pro X High Compression Piston Kit
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Pro X High Compression Piston Kit

Our Price: $143.97

MSRP: $191.43 - You save up to $47.46 (25% off)

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Additional Videos

How to - check piston ring end gap

Pro X 4 Stroke Piston

How to - Four-Stroke Top End Rebuild (Part 2)

How to - rebuild the top end on a motorcycle or atv (Part 2)

How To - Hone A Cylinder

How to - rebuild the top end on a motorcycle or atv (Part 1)

RM YouTube Channel


  • All Pro X piston kits come complete with piston, rings, wristpin and circlips, ready to install.
  • Piston and components machined from low-expansion, low-friction alloy, the same used by Japanese OEM engine manufacturers.

Pro X High Compression Piston Kit Reviews

Each review submitted enters you into a
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$500 gift card quarterly drawing!
4.3 / 5.0
6 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
No instructions
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
October 23, 2012
Trafford, PA, US
2008 YZ250F
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.
December 14, 2010
Oliver, BC, CA
Age: 25-44
191 - 220 lbs.
6'1 - 6'3
I would not purchase again
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.
July 5, 2010
love it
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
May 5, 2010
Great Piston
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!
September 8, 2009
fit good
fit and performs well. Great value!
March 26, 2009
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Can the high compression piston be used with stock oem rings ?
A shopper on Feb 8, 2018
BEST ANSWER: If you order a piston kit they should come with the rings that you need. When it comes to a high compression piston they need the specific rings.
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