I have just bought a 2009 yz450f and have a few questions. First I've rode a crf450 and this yz 450 I'm getting is a beast compared to the crf how can I tell if it's had after markets installed. Also is there a way to lower this bike. Bike is supposed to have fresh rebuild before my friend bought it. When I rode it man was it awesome keep in mind I weigh a little over 250 and this thing has no problem standing up with me. Also how reliable will it be just as a casual rider with all Maitenance done. Will get pic soon as I get it home.