Spark Plugs: Copper or Brass

[slipfit33]

Heya Fellas,
So I aquired a Honda CM250 few weeks ago, and I'm looking to rebuild the engine, after I'm sure it'll run. So I called up advanced auto store and they offer two types of spark plugs, one with brass and on with copper. Did know the pros and cons of these two, or if there were a right or rong. Anybody have any advices?

Thanks,
-slip-

 

[AlphaDogChoppers]

A spark is a spark...

 

[lingo]

Cheap until you get the carbs dialed in.