I doubt that very much you can use a lot of power in a truggy, but it's still possible to have too much...

I have to be clear here because I don't want to mislead anyone, that the extended break in method applies more to the Alpha line, not so much with the US Spec. We never felt the need to take extended break in with the US Spec. It is made in a completely different plant and a totally different animal than the Alpha line.

As far as specific methods for breaking in the Alpha, just start the engine and get the tune close on the box, but keep it on the rich side. Just start running figure eights in a parking lot and do that for about 4 or 5 tanks. Make sure the idle is laying down and consistent. If it's not, you might have to seal something up or put a spring on the carb. We always seal up the carbs really well. After that just run it on the track making sure it's slightly on the rich side until you get several bottles of fuel through it. In between runs make sure the piston is at BDC and let it cool all the way down. You can race tune it and have fun, but just don't cook it. From that point you need to be patient and not expect too much RPMs until the piston loosens up. It takes at least a gallon, maybe two. After that, it will be nearly impervious to damage. Turn in the screws and let it eat. You could be lean bogging on the track and as long as you richen it up in a lap or two it will be ok.

The first paradigm most people need to abandon is "pinch is important"... it's not! You don't want any pinch binding your Alpha. Run it until the fit is loose, then you will be rewarded. As long as your tune is consistent & the idle is solid, you are in good shape. Cody's race engines for Worlds or Nats have minimum 2 gallons through them.

Thanks for the question, I like sharing the info on here.