Connecting the Intake Vacuum Ports

[Junkie]

better than mine, I haven't ridden outside of CA yet

[t3rmin]

I've done this to two GSs with noticeable smoother running and slight low-end power increase. Both bikes were accurately vacuum synced beforehand. It's standard procedure for me now after seeing the benefits and since it's so easy.

I pick up permanent barbs for the sync ports for cheap from casporttouring.com. Install them with a little Loctite thread sealant. Connect 1+4 and 2+3 with some tubing and fogettabouttit. If you don't like it, no harm done; cap 'em off again.

It's the same idea as the Yamaha YICS system used in (I think) later model XS1100s and V-Maxes.