if the hoses on the old gage are good, it should be fine, just don't rev the engine....
the downfall
of the sticks... you just need to do a comparo, and may not need to adjust anything.
if you do need to adjust, might want a newer system like a twinMax, or other generic system.
just an FYI, the factory airfilter is a good one, and it works well, I cannot justify a K&N for the price on the C14, especially being as it requires oiling...which can be a mess, and disrupt critical sensors. just my opinion. I have no issues with K&N on the old C10 tho, as the factory filters on those always disintegrated...and were subject to issues.