I've seen postings of people installing Harley Sportster mufflers on their Honda twins. I'm wanting to "change things up" on my '81 CM400T. I bought this bike as a project, got it running great, now what to personalize it. I like the idea of installing slip ons to change the appearance and give it a little tone while maintaining the power chamber and air box. If you've performed or seen this mod, please chime in. What year Sportster mufflers install best? If there's another slip on to consider, please share that as well. I'm looking for something that will insert into the power chamber without a lot of modifications.