Join Date: Jun 2018
Location: Silver City, NM
Yes, it runs poorly. Some kind of tuner is in order to allow for the increased air flow. Just bolting on the Bassanis will not solve the problem and will probably entitle you to the 1K fine. Once you get it tuned, give it a bit, and then go back to the plugs.
Conventional wisdom used to be that one could open the exhaust w/o having to re-tune/map, but if the intake was opened up tuning/mapping was an important safety tip.
MotorbikerX on his first 3/12 post has it right re what to do and when.
And, you might think about drilling the stock mufflers. Do it in steps until you like the increased volume. But if you keep the torque-tube intake consider some kind of tuner. You will be glad you did.
Re the new CA law, my understanding is that it relates to the emission system as well. If your bike has catalysts in the exhaust pipes you can drill the muffler w/o affecting their work. If the cats are in the mufflers, punching out the center of the muffler would limit the effectiveness of the cat.
The cats are in the mufflers of my 2016 Sporty so I drilled around the center pipe. The exhaust must go through the cat and baffle but can exit quicker than before. A bit louder, but likely to allow me to visit my friends in SD, CA w/o any legal hassle.
Certainly you have done it by now, but the Sunrise Highway, with a stop at the overlook to see the sun pop, is a peach of a ride.