Ok the first one is how do i know if i jetted my 450 right. I know you can take the spark plug out and look and see what color it is. What color will it be if it is right/wrong etc.?

And does anyone have any tips on re-wiring the head lights so that when i turn my key on they will come on instead of having to start it?

 

You want your spark plug to be a tarnish rust color. White is too lean(too much air not enough fuel), and a black plug will signify too rich(too much gas not enough air).

From what I hear, the YFZ's come too lean from the factory.

 

also not a good idea having ur lights on without the engine running, the battery isn't that big.