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Comments On Jun 18, 2013:works just fine looks just like oem seems to function just like oem too much cheaper way for same thing
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Comments On Jun 11, 2013:fit fine, works fine
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Comments On Jun 11, 2013:havent got my order yet but if its anything like my last order it will be awesome
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Comments On Jun 03, 2013:great product great price
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Comments On May 17, 2013:As always, great quality stuff from Wiseco.
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Comments On May 08, 2013:Did a complete rebuild 35 hours ago, after i did heat cycles i tested the compression , was at 210 wet, today at 34 hours its like 205 or 208 wet, so basicly no loss, going to replace it at 50 hours though to be on the safe side and their pretty inexpensive too . Will defently buy again, the only piston ill run in my 2 strokes,would recomend to a freind
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Comments On Apr 11, 2013:Wiseco is great! Never had a problem with them. plus fit and finish is awesome!
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Comments On Apr 09, 2013:Have bought 3 of these for 250f and 125 great instructions, no issues. Circlips are a pain as always. Will keep buying till one fails. Hasn't happened yet. :)
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Comments On Apr 01, 2013:Wiseco are known for their high performance forged pistons. I fitted my top-end out with new Kibblewhite valves and springs, and a Wiseco piston. It works a treat. I've run about 15 hours on it so far, and I can really notice the power difference.
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Comments On Mar 21, 2013:I bought this for use on my 2000 cr 250r,I am 56 yrs old and have owned 2 strokes since i was 13.So i have done very many top end rebuilds. The problem with this piston is that the centering pins for the rings are very shallow, not as pronounced as stock. so if you have to spin the piston just a little bit to align it into the cylinder, the rings tend to ride over the pin.Then it gets stuck in the cylinder and you have to play hell to try and get it out without messing up your cylinder. Bought the stock parts went back together just fine and runs like a champ,so stick with stock.The parts are actually cheaper then the weisco.
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Comments On Mar 14, 2013:If you just want to rebuild your top end, this is a great piston to use. In conjunction with pipe, reeds, port and polish, and oil injection block off kit there was a huge gain in power. I would recommend the oil injection block off for the break in period.
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Comments On Feb 15, 2013:I will stick with OEM for now on.
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Comments On Feb 15, 2013:Looked at it today after 20hours and still looks new
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Comments On Feb 10, 2013:Great two stroke replacement piston kit
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Comments On Jan 28, 2013:Great increase of power over stock
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Comments On Jan 23, 2013:Great piston!!! Never had any problems with it. I would recommend if your rebuilding your top end put this piston in and make your bike roar. Its great and the best you can buy.
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Comments On Jan 04, 2013:Cant go wrong ever with this company. forged pistons instead of factory cast...
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Comments On Jan 03, 2013:Great fit and performance.
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Comments On Dec 30, 2012:.
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Comments On Dec 19, 2012:I have bought other piston kits and this is by far the best one. I installed it myself without any problems and would recommend it to anyone.
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Comments On Dec 16, 2012:Part fit good but before I put it in there was shavings in the the piston holes...
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Comments On Nov 21, 2012:great piston only one i think ill ever buy
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Comments On Nov 12, 2012:High quality forged piston at a reasonable price. Comes with wristpin and clips.
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Comments On Oct 30, 2012:Great product
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Comments On Oct 24, 2012:High quality forging that worked flawlessly. As good or better than OEM in my experience in the desert environment under high heat loads. Can't beat it! Stick with a proven performer @ this level of rebuild.
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Comments On Oct 23, 2012:Wiseco. We all know they make great stuff.
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Comments On Oct 22, 2012:The quality is very excellent and product are always good packed !
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Comments On Sep 27, 2012:always great
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Comments On Sep 05, 2012:great, have been using for years
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Comments On Aug 29, 2012:Put piston in a 02' cr125
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Comments On Aug 28, 2012:Wiseco piston kits are the best.
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Comments On Aug 20, 2012:Put this in a kx 100. Only pistons I will use
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Comments On Aug 05, 2012:great for any bikes. love wiseco products
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Comments On Jul 16, 2012:Installed without problem in my bike, fit well and came with detailed instructions, although not really needed it was nice to have them included with the piston. After several heat cycles and properly breaking in the rings/piston I still have lots of compression, 10 hours so far on it and havent had a problem. Only thing to remember after installing it is to do a proper break in, or it could create hot spots on the cylinder walls and scratch it up pretty bad, costing well over 500 bucks. Break in procedure is easily found on the web.
Overall i recommend Wiseco over anything else.
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Comments On Jul 07, 2012:I've always had good luck with Wiseco in two strokes. Have put them in bikes, quads and snowmobiles with good results.
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Comments On Jun 12, 2012:Best piston for 2 stroke!!!
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Comments On Jun 11, 2012:I've used these in various bikes, never had an issue.
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Comments On May 28, 2012:no problems ever with many wiseco's a+
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Comments On May 22, 2012:I always have faith in the Wiseco pistons, which is more than I can say for the rods.
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Comments On May 21, 2012:i love the wiseco piston kits.
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Comments On May 15, 2012:No complaints
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Comments On May 12, 2012:great product ..
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Comments On Apr 20, 2012:I have put a lot of hours on wiseco pistons over the years and have never had a failure, and have never found any cracks or deformation at rebuild time. I have often found cracks or chips on stock pistons. They always have good machining and very neat casting on their products.
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Comments On Mar 26, 2012:This is a good price point for a replacement piston. I have heard of issues with ktm bikes with the differences in silicon content of the aluminum Wiseco vs. OEM. (Different expansion rates of head and piston)
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Comments On Mar 19, 2012:got the wiseco top end kit for my ktm 250 2 stroke. great price, fast shipping.
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Comments On Jan 24, 2012:I put this new piston in Jan 2012 and it seems to be working great so far. Came with all the replacement parts needed for a piston swap.
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Comments On Jan 23, 2012:Very nice kit at a decent price...i've had no problems with it at all,very staisfied!
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Comments On Dec 13, 2011:Best Piston available.
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Comments On Nov 25, 2011:Made a very noticeable difference in power. Coupled with an aftermarket filter, exhaust, and a cam, the Wiseco will REALLY break loose the power in the motor! Very easy installation (and I'm a novice mechanic) with well written instructions. No special tools needed for installation.
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Comments On Nov 02, 2011:The piston was amazing, it is a little bit heavier than stock but that gives the bike a little more bottom end which is great if you ride in the woods like myself. The extra machining on the top gives you more compression and power.. I have already bought two more for later rebuilds..
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Comments On Oct 31, 2011:wiseco makes the best kit out there. Bought the kit for a yz125 came with everything it said installed easily and my bike has better compression. I have not been able to break my bike in yet because of snow, but as soon as I do I will see if it ads power too. Seems great so far.
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Comments On Oct 31, 2011:I've been buying Wiseco for years and years and years. They work great. Quality is great. The price is right. I bought a Vertex once, and didn't notice any difference in any way at all. Why spend more?
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Comments On Aug 15, 2011:very solid unit
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Comments On Jul 15, 2011:This piston is amazing if you have a 2 stroke do this yourself easy only takes about 20 minutes after I put this in It started up first kick and still starts first kick and sounds much better i highly reccomend this product
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Comments On Jun 28, 2011:livened my motor right up
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Comments On Feb 14, 2010:Great piston! easy to install, you can actually find a Rocky Mountain ATCMC video on youtube of one of their guys doing a top end on a 2 stroke, its great, i highly recommend it for beginners.
Anyways, this piston is STRONG! After all the break in, i got too much torque to handle in my tight wash, and enough top end to keep putting a smile on my face. Not to mention the crisp, powerful delivery that makes 2 strokes so much fun. Also sounds good, gotta admit all that extra compression gives it a whistle that makes heads turn when your pinned in 5th. =D
Wont buy anything else!!
Additional Comments On Jun 20, 2011:Coming up on my second rebuild soon. 3 dune trips and 4 track trips, plus about 25 hours of trails. This thing is bullet proof. I won't buy anything else.
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Comments On Jun 14, 2011:I put in this kit in my bike and deffinetly felt the change in more power felt alot more responsive. That could be because I waited eleven ten years to change the top end though
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Comments On Jun 04, 2011:Everything else is a waste of money
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Comments On May 25, 2011:Great kit for any bike
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Comments On May 24, 2011:I HAVE USED WISECO FOR YEARS. TRIED A VERTEX PISTON KIT IN YZ250. I REALLY LIKE THE QUALITY AND WHEN IT CAME TIME TO REPLACE, THE PISTON WAS STILL IN GOOD SHAPE, REALLY DIDN'T NEED TO REPLACE, ONCE A PART LETS DO IT. THERE HARD TO FIND ROCKY MOUNTAIN DOESN'T SELL. VERTEX DIRECT. THEY ARE THE OEM PISTON FOR KTM
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Comments On May 18, 2011:Came with piston, rings, wrist pin, and clips. Did not come with wrist pin bearing.
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Comments On May 07, 2011:Put these in my banshee and would highly recommend them.
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Comments On Apr 10, 2011:Best piston kit I've ever purchased.
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Comments On Mar 21, 2011:great has like 5 years on it , i should really do a top end job soon, i found that a factory piston is some times cheaper thru rockymountain than the weisco, factory is generally the go to as far as pistons go
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Comments On Mar 14, 2011:I have been using Wiseco pistons for 30 years. I am pleased with their quality. Never had one to seize. Of course I use good oil too. Not the most expensive, hot name oil, just good oil. Yamalube 2R for 2 strokes.
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Comments On Feb 25, 2011:I will never put anything in my motor other than a Wiseco after purchasing these two piston kits. Don't forget the wristpin bearing also. Well worth the money.
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Comments On Feb 22, 2011:proper size, came with c clips, rings, stickers, wrist pin (no bearing). had to gap rings myself with feeler gauge
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Comments On Jan 13, 2011:The piston fit great and came with all the necessary hardware. Replacing a worn piston is the best thing for a bike, especially a four stroke. I sold the bike so I can't comment on the longevity but Wiseco always seems to put out quality products.
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Comments On Dec 28, 2010:Never had any problems using wiseco in place of oem in my yz250.
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Comments On Dec 18, 2010:by far the best piston way better than the prox use the tusk gasket set with it same quality as cometic
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Comments On Dec 12, 2010:Works well no problems. Easy to install, for a piston.
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Comments On Dec 05, 2010:just wish you could get the size marked on cylinder of yamaha
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Comments On Nov 20, 2010:I Like wiseco pistons because they are made great and the fact that they come with clearance specs for each piston sold and they last longer than most stock original pistons.
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Comments On Nov 18, 2010:It has more power then stock one and very easy to put in!
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Comments On Nov 14, 2010:Always a perfect fit, always has us finishing on race day.
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Comments On Nov 10, 2010:Awesome!!!
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Comments On Oct 18, 2010:bought my 400EX used it sat for about 2 yrs. before i got it. wound up burning oil, had it bored .040 over, ported, cammed, full FMF exhaust and K&N filter jetted for for good fuel and 20w50 oil and have not had a problem. Since mods I've had one buddy beat me on a Raptor 660, and not by much!!!!!! Wiseco makes a great product!!!!!!!!!!!
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Comments On Oct 12, 2010:GREAT GOT ME BACK UP AND GOING
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Comments On Sep 02, 2010:Piston is top notch. I only use Wiseco pistons and have never had a failure. Best there is.
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Comments On Jul 24, 2010:great power and look good
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Comments On Jul 21, 2010:I don't think wiseco is the best overall, others are just as good for 30 dollars less, but they are always quality. I made the mistake of thinking my cylinder was pretty good on my 99 ktm 300 exc, but it was scratched what i thought was slightly, but turned out it was worse than i thought and scratched the piston wall, sent the cylinder to Millenium to have it recoated and fixed to stock bore size and used a fine grit sand pad in the piston to take the slight scratch out. Moral of the story, Have a Mech look at your cylinder before re-installing if you have'nt done a top end alot, the recoat cost me 260 dollars.
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Comments On Jul 19, 2010:This is a great piston for that worn top end!
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Comments On Jun 28, 2010:i have had these pistons for at least 5 years in my quad and my dirtbike and they are always fast and they have never let me down
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Comments On May 14, 2010:Wisco Pistons have never let me down and always have the best quality. Forget those Pro X pistons. These are the way to go!
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Comments On May 09, 2010:Purchased for 2004 WR450. Primarily ridden in desert of Northern Nevada. Packaged well, would purchase again. This is the second slug in stalled in bike first one lasted a little over year and half and countless hours with minimal maintenance. A+
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Comments On Apr 16, 2010:I put this new wiseco piston and ring in my 1993 Yz 250 and they work very well this is the way to go. I have been beating up on all the newer model 250 so if you want to go fast wiseco is the way to go.
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Comments On Apr 10, 2010:added noticible power and lots of throtle response to my Honda cr85, don't forget to buy a wrist pin bearing this does not come with one and you have to drill lube holes if you have a exhaust bridge to cool it down but was well worth it and only took 30 mins.
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Comments On Feb 14, 2010:this is a great piston, forged quality... no issues with it so far. wiseco has always been a trusted name in my book. and i will continue to trust my machines to wiseco in the future.
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Comments On Feb 12, 2010:Its wiseco, great quality
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Comments On Nov 19, 2009:very good throttle response! major difference from the oem piston.very easy installation.
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Comments On Oct 30, 2009:Worked great however the clips were kind of a pain
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Comments On Oct 13, 2009:WHAT A HUGE DIFFERENCE OVER THE OEM PISTON!! THE THROTTLE RESPONSE FROM MY 03 CR250 IS INCREDIBLE FROM BOTTOM TO TOP IT ABSOLUTELY RIPS!!
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Comments On Sep 02, 2009:Wiseco pistons never let me down, super reliable and made my bike run like new!
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Comments On Aug 20, 2009:There is a noticeable difference in performance, revs quicker. Great product will be buying next time i do my top end.
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Comments On Aug 04, 2009:Only brand piston that I buy...never had a problem.
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Comments On Jun 14, 2009:awesome piston and perfect fit. lots more power after top end rebuild with wiesco.
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Comments On Jun 10, 2009:Great Product!!! Very durable!
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Comments On May 30, 2009:its a wiseco. Unless you are totally "derr..." and can't jet your bike these pistons will last.
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Comments On May 11, 2009:Have been running this piston in my KX 250 for almost a year. Have no complaints. Bike runs great, did not really notice any difference from the stock piston.
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Comments On Apr 23, 2009:great piston kit tons of power after install much better than the other brand
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