Few things to take note of with this engine. The rear bearing is not very good so you should replace it at the 2-3 gallon mark. Mine went 4 gallons until it was really gritty. If you rush break in the rod/crank pin can develop slop. These engines take about a gallon to loose metal pinch. I got 9-10 minutes run time, and that's about normal with most of my engines. Of course there are many variables with run time so 9 minutes on my tracks could be 12 on yours.

Also when I ran the engine I tried out a different fuel, and that may have caused premature wear and other issues. At 5 gallons there was some slop in the rod and it couldn't hold a stable idle. I've owned both the Tecnopower and the Alpha and I liked the Alpha better because of its longevity. The b01i did had a nice smooth power band for buggy, although for some it may not have enough bottom end.