I have suspicions about the sealing ability of the phenolic spacer used in the intake system. I tried using yamabond and a week later there was not a trace. I can only conclude that it got sucked through the motor which means that air is currently passing through on both sides of the spacer. The same phenolic spacer on my BMW /2 has a paper gasket bonded to each side and I would like to see it available for Norton. Is there any sealer that would stick to the phenolic? Yamabond isn't it.