No PV's on my racer. I'm a high RPM rider so I don't miss them. On the street? Depends on your riding style. My bike hits hard at 6800 RPM and carries to about 11,000 RPM. Like lt1bird said, run them rich and make sure they are fully warmed up before getting on it hard. I change pistons and rings about every 600 race miles. This keeps the cylinders in great shape. On the street I bet you could run it for thousands of miles.
2 races - 2 wins thus far this season.