Re: true a sprocket
With the wheel off the bike I wrap a peice of coathanger around the axel and tighten it down. Then bend the coathanger point to where you want it. I usually do it for center first touching the outside of teeth, then for true place the tip of wire on the side of sprocket and tighten appropriate nuts.
"No such thing as a stupid question, just a stupid answer"
48cc Grubee Starfire Round Head......