Hey, it's all good.  Only 4 hours.  Just what other more important things are there than working on your bike?  Aside from riding, that is...

I'd go ahead and dive into the spacer....it will improve your mid range and help with the backfires and pops.

Nasty is a good thing  8)

Rode the bike in to work Monday morning.  First long ride with the MAC muffler on. The timeline for the ride went something like this:

6:30 - 6:45 - "Now that's what a bike should sound like!"
6:45 - 7:00 - "I wonder if it might be a little too loud?"
7:00 - 7:15 - "Yeah, it's definitely a little too loud"
7:15 - 7:30 - "Are my ears ringing?"
7:30 - 7:45 - "I gotta get this ****ing pipe off the bike NOW."

Of course, I had to ride it all the way home again.  So, the stock muffler is back on the bike.  I left the K&N air filter in and the 155 is still in the carb.  If I find another pipe that'll give me a nice low rumble without the high noise level, I may try again. But for now, it's back to doing the lawnmower impersonation.

I have a sportster muffler on mine. Not a lot louder but a realy nice throaty sound. No Complaints from the neighbors. It was also  a piece of cake to install. I picked up a 7" Heatshield from JC Whitney.

Hint on the heat shield: Call in your order, it was $5 less than on their web site.

" Hint on the heat shield: Call in your order, it was $5 less than on their web site."

Thanks!

I'll be buying one soon for my suppertrapp mod

Weez

I ride in PA a lot, and I'll guess that particular rule doesn't get enforced much.  I wear earplugs all the time with my half-helmet - the wind noise drives me nuts otherwise.  Never mind what the Screamin' Eagle muffler does after awhile.  

I'm with Lancer on this one.  By shutting out wind and exhaust noise, I hear better.   I can still hear the speedo springs rattle, for example.