Originally Posted by Ben99r1
I tested out my xr650l with a xr600 exhaust without the insert. It is a little loud for highway speeds. But with earplugs or headphone help to reduce the drone. On the trail it helped a lot with throthol response. I really think that it added more power to the bike. I am getting some popping on decel. Anyone running this set up did you have to rejet the carb? I have Dave's mod done rt know. But am thinking I might have to go up to 55/160 or 55/162.
With my insert removed I had popping on developing. After swapping in a 55/158 combo the popping is much better. I found it too loud on the highway without the insert, but it is great with my modified insert.
I did Dave's mod and have snorkel removed and k&n filter. 2.5 turns out on mixture with insert removed iirc