When I got the bike it had a set 0f 76 stock mufflers and headers. The first thing I did was to use a 3/4 inch pipe and knock the baffle plates out of the mufflers. This basically make them a straight through muffler. This gave a small boost in performance over the entire rpm range. In creased the sound level a bit.
I did some engine work and this increased performance, a new top end to cure the severe oil burning, a bit of head clean up. A year or so later I added a 750 kit. Very nice. Stronger runner plus much less vibes above 4000 rpms over it as a 650.
I then replaced the stock mufflers with the Emgo's. There wasn't much of a performance change over the stock mufflers but the weight reduction was a plus.
I ran the stock head pipes for awhile then tried Mike's 1.5 inch headers. They are a nice header, but they are not bent the same as stock. the top bend is more than stock, this moves the pipe back closer to the engine.
This was a problem. It made the pipe too close and I couldn't use the modded side cover I had to use an external oil filter and oil cooler.
I bought some 1.5 inch pipe bends and built my own headers. I can use my modded cover now. The bigger pipes did improve things a bit but not as much as a more free flowing muffler. My Emgo's came from Niche cycle, the number on the box is 80-84052
I see Mike's has some that look like them but come in black. I might get them. I like the look.
Leo
