Been running a banshee with stock carbs, This is what I have jetting 290s pilot 25. FMF Gold series pipes, boost bottle, roost boost. Stock air box, K and N Filter. Snorkle removed. No holes in the box. Been running this set up for years. Last trip out, melted down left piston. some damage to right side also. Been trying to figure out what went wrong. Carb was clean, no debries. No air boot leaks. The only thing I found was a plugged pilot jet. Can a plugged pilot cause a meltdown at high load. Running wide open in a wash?
I found the jetting guide that gives a good look or idea as to what jetting I should be running. Again been running this engine for many years. Any comments would be appreciated. Any suggestions on jetting changes?
Thanks
David