A straight pipe or drag pipe is no problem, but depending on the carb, you may have to do some rejetting. Of course, yours is a 1986, and the jetting in yours didn't get the EPA treatment that my 2000 did.
The Raask pipe is great and one piece, so no muffler clamps that will leak and blacken the engine case. It is loud but to keep the neighbors happy, I go slowly through the neighborhood