| Yeap pictures are the best reference I have and my trusty Didital camera !
What I do is find the real subject be it a car or motorcycle in a museum or private collection and spend a good couple of days measuring it from top to bottom recording the measurments next to roughly prepared sketches .
I also take at least several hundred photos , once I get back to the workshop I draw everything up on my CAD Program adding the measurements I took , very drawn out process and not for the undedicated !!! | 
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