i bought one this past spring for my cen truggy. unfortunately, during the first gallon, i had to send it in for warranty repair. subsequently, i was not happy and went online to express my unhappiness. however, horizon hobby replaced the front bearing and the engine has performed very well. matter of fact, i have egg on my face when i reflect back on my earlier posts regarding this engine. as most have already stated, this is one of the best values out there. as far as performance is concerned, it will launch my truggy over jumps, raise my front out of corners and expand my tires down the stretch
my only regret is that i didn't get the .21 version of this engine.