i didn't want to cause so much controversy. the yz450 is new to me i traded in an 06 xr650l for it. i didn't ride the xr much on the street so i figured i would loose 100+ pounds and get a dirt only bike. i rode cr125's and 250's back in the mid 80's and liked them both,but now I'm 60ish pounds heavier so that is why i went with the 450. i didn't realize how big a difference there is between 2 and 4 strokes. i know that the yz will never be the ideal trail bike but i just wanted to make it as trail friendly as it can be. i guess the biggest improvement i can make is more seat time so i can get used to it. thanks for the help.
XRdad. The YZ450 is a great bike for the trails. Everybody has input. Its all good. Your right. More seat time will help. Get the jetting right too. If its hard to start, that can make for a really rouph day.
I run Evans
coolant in my 450 and dont have an overheating problem, but I run the stock cap not a higher pressure cap. I dont fill the radiator to the very top only about a half inch from the filler neck.
I would run a heavier flywheel weight. You'll have to try different weights that work for you.
Running that slipper clutch will be a big help but does have disadvantages.
For me I didnt like it but for your style of riding you might like it.
Take the time to set your bike for you. It will take some time, but when your done it'll be time to by a new bike. Good luck