Hey guys i'm new to this forum, i do however read it a lot when i search questions it usually refers me to this site and i get it answered, but i have a question i want to ask that i couldn't find so i made an account to ask. I recently sold my 05 trx450r, and i currently have a 91 Kx500. (well it's my dads but i ride it 10x more then him) I've been saving up some cash i'm looking to add another bike to the family. I'm leaning towards a 450. The Yz450f in particular. And i was just wondering, is that what i should get? are these good bikes? would i be happy with it from a kx500? how does it compare in terms of power? I know in a straight line a 450 4 stroke would have little chance against one of the 500's but i also know the 450 would have much better handling, But i'm just wondering if i should make the transition from a 500 2 stroke to a 450 4 stroke? or should i go with the 250 2 stroke? I do prefer 4 strokes mainly because fuel economy. the 500 i currently have is a PIG on gas, it has the stock tank and i will be lucky to get just over an hour on it... I mainly trail ride. I do mess around on a friends track every once in a while but nothing professional. I do also love enduro but i have another bike for that lol. also if i should get a 450, which one? i like Yamaha & Ktm the most but i'm open to other's opinions on the matter since i have never my self owned a 450 bike. Thanks guys.