How do I remove heavy oxidation from front forks on my 650 dargstar

SOURCE: uneven front tire wear

I would suggest that the wheel is of centre. check your preload and fork oil. you may also have a weak spring. this will allow one fork to ride higher and cause the wheel to lean to one side.

SOURCE: uneven front tire wear

Idoubt your fork fluid levels have anything to do with uneven tyre wear,depending on where you live dictates how your tyre wears,if you live in uk then you tend to turn right more than left therefore wearing the tyre more on the right and reverse this for anywhere they drive on the wrong side of the road.tyre pressures are important... to check the fork fluid level you need to drain the oil into a measuring jug,compare result to manufacturers recommendation.if you are not mechanically competent do not attemt this as you may get hurt as the fork internals are under load from a spring

SOURCE: changing a front tire on 2007 vstar 650

you will have to use a brass punch and knock it thru the bearings in the wheel and when you put it back together i would change the bearings and grease the shaft

SOURCE: Honda FMX 650 - quantity of hydraulic oil

The best way,is to drain a fork leg into a container, and measure the amount. however if you cant do that, start of with about 100ml in each leg, test them out, if to soft, you can always add a little more oil. from memory, a 250ml bottle of fork oil was enough to do both legs on most bikes.