I added this piston kit to my CRF450X and it made vast improvements to the torque and handling. I'm an unsponsored XC racer and I'm able to throw the front tire around, run a taller gear and use the extra grunt all the time. I've ran it for one season and had zero problems. I'm adding this to the rest of the garage. Love the product. This bike is a blast to ride. Nice work.
Write your review and you'll automatically be entered in our monthly drawing. Include an image or video to DOUBLE your chances to win!Write Your Review
Good piston kit. I like the fact that it came with a coated piston pin. I would have given it five star rating except I think it's over priced.
Improved power delivery though out the whole engine range. Most noticable at mid high range. Great mod product if your looking to keep your bike mildly stock without busting your race budget. No additional engine mods needed to the engine. Im sure after 20 hours I will be rebuilding the head with a new piston because the extra pressure on the valve train will stress the stock valve springs to there max. Get an hour meter with it. Im sure 20 hours is the max if your racing the bike.
JD piston, and pin, with OEM Kawasaki rings, packaged as Pro Circuit piston kit! Not what I expected.
It give the bike high performance and acceleration to the bike
It was easy to install and once u run it my 08 rmz250 had a little more power than it did before and it changes te sound of ur bike to while if u ask me my bike sounds alot better now
I installed this kit in my 08 RMZ450 along with new Faction MX intake valves. The bike has more power all through the range, starts easier and I can ride the bike a gear taller in all situations.
Great product that I would highly recommend.
Don't buy this! I bought this for my 2010 yz250f and I got the JE piston and the stock rings for it. The stock rings do not fit this piston. The JE piston is a two ring set up and the stock piston is a 3 ring set up so you cannot use the stock rings for it.
I put this piston in my old crf 450 (05) and noticed a good improvement over the stock piston. a day after i put it in though, i threw a keeper out of my right exhaust valve - my fault the valves were shot.
installed kibblewhite valves and springs. torque was incredible- almost tractor-like. with an exhaust as the only other motor mod, it was good enough to win me a trophy at the sand drags- 5 bike lengths on a cr500. definately worth the money and cheaper than a full exhaust system.
After installing this piston and riding one day, I couldnt feel much of a difference. It may be from me rejetting my bike incorrectly at the same time however. piston looks great and easy to install. just make sure you dont drop any piece into the crank case or lose any pieces.
premium pump gas (91-93 octane) will be fine