Wiseco marine pistons. Read the story on how Wiseco evolved from garage-made pistons to an industry leader in aftermarket performance. Dec 17, 2009 · We sell Wiseco, JE, and ProX. Jun 12, 2017 · The tolerences of the wiseco are tighter. Typically, this is how they compare to each other: ProX - Cast piston, similar to OEM, economically priced. When I first built my Shovelhead I messed up and made the bore clearance too tight and had some serious issues. After that I learned to add an extra . Sep 26, 2015 · Pro-X is made by Wiseco. I am asuming because of the metalurgical differences between the cast / forged materials and process. In 1940, when Clyde Wiseman first manufactured his own big-bore marine engine pistons, in his garag Jan 26, 2010 · The Wiseco Prolite for the '91-'94 KDX250 (part # PS90 if memory serves me) is approximately six grams lighter than the OEM cast piston. Can't wait to ride !!! kruspy378 130 Joined I have a 2006 250 XC-W and was wondering what other fellow KTM 2 strokers were using in their bikes. Nov 12, 2009 · I've used Wiseco pistons pretty religously in high performance applications for years. . I believe they use a little different material also, hence the price difference. All three brands are owned by the same company, PMI. 0005" to the clearance spec they recommend on anything aircooled that gets ridden hard. Wiseco - Forged Piston, improvement over OEM, medium price. The last Wiseco piston I personally tried was in a KX250. But I've read several horror stories. JE - Forged Piston, premium product with all the tricks, highest price. Feb 10, 2007 · Wiseco! Wisco pistons are forged, and lighter, Stock are a weaker cast piston. This is generally from either a worn out piston or a worn cylinder. Sep 26, 2015 · Pro-X is made by Wiseco. Anybody who tells you stock cast pistons are better than a nice strong forged piston, really doesnt know too much about pistons. Pistons usually crack a skirt from having excessive clearance allowing the piston to rock in the cylinder. With that said I have used both with no issues but I usually buy Wiseco Uhh, you mean the Pro-X that is made in the Netherlands at the Pro-X manufacturing plant? Sep 22, 2010 · So I'm looking to rebuild the top end on my 2006 yz250 here soon and I was wondering what opinions yall have on the two different pistons? I have used wiseco pistons for my 125s and 250s in the past with no trouble at all, but vertex is a little bit cheaper. What would you do? Sep 15, 2009 · Wiseco makes (made?) their pistons to fit tighter with less clearance so they seized easier. The Wiseco brand pistons are forged and the Pro-X's are cast. At 8000 rpm, six grams is an enormous difference. . I think in the wiseco instructions they slso specifically instruct you to use a wiseco ring set with their pistons. I've heard good things about the Vertex, but Wiseco is supposedly snappier. Weather is getting nice, slowly but nice. Oct 29, 2021 · Wiseco was born 80 years ago from a passion for the performance and racing lifestyle. tqcj7 hqav1r 9q hbh cu0je ywv oieqb0s8 lasqc zsal mbf