It is possible to drive the car to here: 45.457199,7.7288
From there you have to carry the boat approximately 1km upstream following a hiking path. Descend to the river at the second side stream that you cross.
The ckfiumi description (https://www.ckfiumi.net/fiume.phtml/396) is still accurate as is the grading III-IV (V/P). The (V/P) is one rapid in the narrow upper part that features a strong hydraulic and pinning potential. It is difficult to set safety, strenuous portage on the right.