From calculations on my last post about conrod life, according to Sirio factory, one should change the conrod between 0.4756 to 0.7133 galon !!!!!!!

How come??? Well, if a 75cc tank lasts an average of 5 minutes, one makes 12 tanks in 1 hour, which is 900cc. So according to Sirio that says change conrod after 2 to 3 hours running, that means change conrod between 1800cc and 2700cc of fuel. Now if 1 galon has 3,785cc, that means the lifetime of the conrod is less than one galon.

In my case, my engine is over 2 galons, so I'm way past the conrod's life span, which i verified with the measurements of my last post.

So if in a Break-In process one consumes apx. 1000 cc of fuel (about an hour), it souds good to me to change the conrod after it and then get your 2 to 3 hours of safe racing time.
AFM