have not played with the bike yet to check the sync at higher rpms, but wanted to add to what Vex said earlier about taps to provide easy access to the vacuum spigots. I added tees to make extra ports available and ran separate lines out to the side of the bike so when I need to check the sync, it's just a matter of removing the side cover and hooking up the meter to the two hoses shown in this pic just below the tank with the blue caps on them.