Guys,

I have a Novarossi NSR12S5, and all through its less than 30 tanks of fuel already I have had two pistons with the lower skirt broken. While I was running the engine I did not lean it, and the engine keep running under 100F. What gives? Did I had a lemon, or am I wrong in setting the needles? I am running NR CTF6 plug, 30% nitro, on a FW05. Needle setting is a tad less than 5 turns main, 3.5 turns idle. Should I call a quit with this engine, or should I get the piston/liner, conrod and piston pin again and give it one more try?

Also, now I have two liner perfect without scratch, anyone knows where I could get just a piston so that I could save some $$$?