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MotoGP God
Bikes: 748S, HM1100S, V4SP, Was: DD-A #111
Posts: 13,088
Join Date: Feb 2002
Location: Back in Essex
Mood: Passion Killer
Use an existing road fairing and place the race fairing inside - they should overlap?
Draw round the full hole of the headlight, which shows you exactly where the headlight is.
Now you can measure from the corners to centre the cut for your hole.
I did this with my DD bike fairings when marking up some cut-outs for it!