Originally Posted by rmargiotta

First of all....lapping the piston, y'all are out of your mind.....lapping and snapping rods?! You shouldn't every go to full throttle on the break-in bench. It's to run 1/2 a gallon to 2/3 of a gallon at 1/3 throttle max as you just need to seat the piston into the sleeve. Also, fuel is crucial!!! The goal is to run the motor as rich as possible (lubrication to help piston gradually seat) but to get the temp high enough to burn the oil so it doesn't varnish and seize. This is 180-200*F. For this you should run airplane fuel or add 30-60ml of castor oil to a gallon of car fuel to get the temp higher and run as rich as possible.

Get a .12 or .21 (depending on size of motor you're breaking in) onroad header, and use your the pipe you're going to run.

For the guys complaining about the noise, get an empty gallon fuel jug and put it on the stinger and put a small hole in the top as a huge muffler. The same can be done with a large tupperware container to muffle the sound. Here was my setup for both of my FX motors last week.