Ok guys i run for team orion. If you can get a really good deal on the older abi motor ,those are good motors.But i don't know how part support is for them. I personally run a 3 port crf abi in bugggy that is still breaking in. These motors like PK says take awhile to break in but you can still race them as they break in. You will see the motor run rich all of the sudden, after you have a good tune. The biggest problem is people tune themselves out of the power and temp range ,small turns on the needle are best. My personal 3 port was getting around 9.30 at revalations raceway on a dry track in my mp9. This with the motor still running rich. I also have 5 port crf abi true motor that i ran also at revalations and is pretty much broke in. The five port was on the track for 11.20 in the mp9 with the stock venturi and 2013 pipe. I run pro and people that know me know i like to drive my cars hard. I know a sportsman driver should have no problem going 9 min with either motor with the 2013. Just make sure you turn the needles on the motor and don't let 5 people show you what they think you should do. Be patient and if you have a issue try to grab another Pro or someone who has some motor knowledge if you get lost . PM me if you need some help or if you are local to So cal Area.