AB Mods
RCTalk Member
My AB Mods Team driver Brian Dunbar who is also sponsored by Team Orion came by today with the new US Spec Team CRF .21 engines. They have made some changes on the engine such as sleeve port timing, crank timing, venturi, and a new drilled/lightened cooling head. So I'm going to break them in and do some dyno testing etc. I snapped a few quick pics of the engine, so here is a sneak peak of the new Team US spec Orion CRF .21 offroad engine!