5 look brand new, aside from some soot and one has a bunch of white ash on it. other wise they look great, the engine is only supposed to have 15000 miles on it, so I am hoping I can save some of the parts to reuse, also save me in the long run.

What I have decided I am going to do is pull the motor and tear it down for a rebuild, it is the easiest way to learn and hopefully I will get a good engine out of the deal.

Can I upgrade anything, like the cam or carb or anything?