Seemed to ru fine the first 2 days of riding but rode today and noticed if you roll on the trottle pretty good then roll of quickly it will backfire a little. Any suggestions why? Does this mean fuel tuner needed?
Chances are everything is fine. Give it some time and see. If you removed the pipes from the heads for any reason and did not replace the gaskets that could be your problem. If you didnt remove them you should be fine. You wont need a tuner untill you change the amount of air going in.
I just bought a new 2010 Stateline abs, installed the V&H slip ons, SOUND IS GREAT, Perfect for me, you may want to check that your claps that tighten the pipes to the honda headers are at the end of the V&H pipe and are tight tight tight, they need to crush that slit so as to avoid leaks that can cause backfire,,,,,jmho! Bob