this is my first "trail" bike or the first bike i've owned that hasn't been an MX bike. Still getting used to the weight (on trails it feels nimble as hell but on sand i'm having some trouble) and wondering what i could shave that i'm not going to be using anyway.....I know of the following: lighter battery front light rear light other than that Im not really sure what to look for......with those items removed what in the world is causing this increase over a YZ450F? I know the radiators are a bit bigger but what else? The lights are negligible but based on the website I am showing a 30lb difference. I assume battery is around 5 lb's so is it just the electric start mechanism's and radiators that cause this?