Haven't had this thing too long and it ran GREAT the other week at an MX/Trail park (600+ acres or whatever I want to do land - Busco Beach, Goldsboro NC) 1: oil/gas mix OK, this thing is smoking a crap load more then it seems it should I'm running 32:1 mixture (4oz --> 1 gal) of Lucal oil (even says non-smoking lol). Very much so a complete noob on this. 2: Parts 1 Ok, so I've been trying to figure out what this damn roller was by the chain...I find the part online and it just said chain roller. What the hell is the point of it? 3: Parts 2 The fuel switch. The words are gone on mine...roll lever down = fuel on, half way fuel off, up fuel reserve? 4: Anyone got a PDF document repair manual and owners manual? Thanks!