Originally Posted by
evert
Finally got around to measure the transfer ports on both the Osprey and the Tracker..
Turned a tapered plug ot of soft aluminium, that I could fit on the end on an extension shaft, then inserted it in the port, from the cylinder end, and gave it a few blows With a hammer. That made marks in the aluminium, and I could measure the marked Places on the tapered plug. Took great care to get good measurements, but its probably only accurate to the closest tenth of a mm.
Tracker port: 2.6mm
Osprey port: 4.1mm
That explains a lot of the noise and slam from the osprey, and means I have some sleeving to do....