VF400F on track

Hard to find information. I have only 2 pictures without details.

Perhaps the front page of an advertising for a kit. The bike seems to have a VF1000R front :


Found in an Italian Web site, rider Bruno Bergamelli, strange middle fairing:

No data for this one:


Several pictures from Japan:

A lot of race bike where updated with VF400R engine, swingarm, new wheels, brakes, liquid circuit and swingarm :