Vertex pistons are a great product. We run them in Josh Clarks CRF450r and YZ250. Over 60 Pro Expert wins last year with them. We change them often but they look great right before we toss them in the scrap pile. Garrett has been running one in his KOR built Blaster for three years with no issues.
thanks ken oconnor for the help. very appreciated! i may be buyng some 400ex bushings from you in the near future. my shocks are a little bit on the hard side. i'm fina;;y getting it back from the mechanic tomorrow! i got a new back hydro put on! i will have pictures up as soon as i get home! I:I