Well today the rod broke in my yz426f in 5th gear @ about 10k rpm, I was buzzing along at WOT for a short period of time then it went bang, crunch then quiet so I pulled over to find no compression. From what I found after pulling the head and jug was the Versah rod broke right below the small end and looks like it has been slowly cracking for a while now. It took out the valves, piston, cylinder, crank and cases. It had about 25hrs on a complete top and bottom rebuild after having my +2mm big bore (444cc) cylinder crack after 10hrs and filling the cases with coolant.
What major failures have you had or am I the only one with such bad luck?
Edited by jojo1224, November 07, 2013 - 09:17 PM.