I actually went ahead and bought the danmoto jisu slip on based on a few I saw on here. I have to say I am extremely happy with them. The customer service was excellent. I had a lot of questions about the different styles they make and they where extremely helpful. On top of that I came from China and only took about 12 days to get here. Very fast. I ordered a remote from china once and it took 6 weeks.
The exhaust and packaging where excellent quality. Perfect welds, nice sound, just a really nice product for a dirt cheap price. Perhaps if this was a new bike I'd buy one dyno tested and tuned for the model but this is perfect for me.
My only complaint is I had to spread the tabs open a little bit on the mid pipe and the muffler clamp they sent was made of that crappy chinese metal thats a bronzish color that it seems all bolts from there are made from and it snapped before it was even tight. Easy enough fix though with a new SS bolt.

What did the cause of the horrible spark problem?