Many yesrs ago I had a Suzuki twin which I removed the exhaust balance and went 2 into 1 as opposed to 2 into to. The power band jump higher on the rev range. I wonder what effect a breva xover. Will we see more bar vibrations because the balancing effect of the cat is no longer there. Some aftermarket systems have a lot of springs on them, I heard the o2 sensor is crystal and can be damaged by vibration. Does the O2 sensor just unscrew? Should get my xover this week. Wanted one of these but couldn't afford it: