Jbevan81

Here is how I have done break-ins over the last 17 or so years. 1. After a rebuild I have NEVER run any different oil than I race with (Used Klotz, Burris, Maxima, etc.) 2. For the first fire, (we have always run computers on our stuff ((RPM, EGT, Head Temp, Water Temp) we ran the motor to maybe 100 degree's. Occasionally blipping the throttle when it sounded a little loaded up. 3. Let cool to room temp, and repeat letting it get a bit hotter. (like others have said you are wearing in the parts to each other and seating rings and what not.) 4. Take it to the track, dunes, mud, whatever and give it a good 10-15min of running easy to do a heat cycle under load. 5. Give her hell. I know this seems like a long process, but you will be rewarded with a cylinder that is long lasting and STILL ROUND when you get done. Plus you wont have as much scoring in the cylinder (if everything was built right to begin with) when it comes time to tear down again. Just my 2 cents from breaking in motors well over 100 times in the past 17 or so years. Jeff