I just picked up a YZ465 and intend to set it up for trail riding. Yes I know the IT465/490, it better for trail use. But I like the way the YZ465 looks and it's what I have. Step 1 is to just get the YZ465 running. I kicked it over a few times and the compression ratio, seems to be real high. I wonder if the IT465 compression ratio is lower? I found the compression ratio for the IT465 at 7.1:1. But I don't know the YZ465 compression ratio. Any idea's on how to set this machine up better for woods riding?