I've never used them. The lower price does seem attractive, but Wiseco has NEVER let me down. I gladly pay the little extra knowing I'll get a consistent product.
I use Pro X in my KDX 200. They seem to be okay for that bike. I had a Wiseco crack in the same engine. Have always used Vertex in the Huskys.
The same company owns wiseco and prox. Not sure how that all works though. It's for a different brand bike so its OEM or prox. Decided to go on instead of saving 50 bucks
Millennium Technologies wrote:We sell Wiseco, JE, and ProX. All three brands are owned by the same company, PMI. Typically, this is how they compare to each other:ProX - Cast piston, similar to OEM, economically priced.Wiseco - Forged Piston, improvement over OEM, medium price.JE - Forged Piston, premium product with all the tricks, highest price. Depending on what you are building and how you use it, a ProX piston is an excellent replacement for the OEM piston.but pro-x makes forged pistons as well?...still much cheaper than the opposition. Correct. Some ProX pistons are forged, but most cast. this is from Millenium Technologies
I was told that Pro X pistons are a way to market pistons that didn't pass quality control for Wiseco or whoever. Friends who have used them, all have had early failures. I use OEM, Vertex, or Wossner.
This too.... Correct. Some ProX pistons are forged, but most cast. I think my friends used forged ones.
in the factory motard SMR450 RR's the factory HC piston is a japanese cast unit. according to george.