Hello, I know that this may sound a little akward, but I would like to ask if there is any way to decrease the power of a CRF450. But first let me explain the situation I'm into. I currently have a 2-stroke Husky WR250 which I mostly use for enduro rides and a little for motocross. As the last 2 years I was out of the fields I'm currently in a bad shape(not that I ever was in a advanced level). So, my 2-stroke 250 tires me up sometimes, because it has lot of power, but sometimes I definitely need it's power, which a 125 would not give me(for example in big uphills etc.) I'm 180lbs and I would like the bike to be as light as possible, so I decided to go for a motocross bike this time and not an enduro one. As I mostly like enduro I would prefer a 4-stroke bike. Now, what's the problem I have... I know that a CRF450 has plenty of power, even more than a 2stroke CR250, so I think that it may not be wise to buy a bike like that and would be better to go for a CRF250. The problem is that I want a used bike and I cannot find a good CRF250 here in Greece(or even a YZ250F) but I have found some very good 450s. So the thing I'm asking is, if there is any proper and easy way to decrease the power of a 450 to suit me, and maybe later in the future be able to use it in case I need it. Because I'm sure that a normal 450 will be too powerfull for an almost novice rider as I am and will tire me a lot rather than helping me improve. I would be grateful if you can give me any advice or suggestions. Thanks in advance.