Looks like 'Stop' to me but a great photo anyway.

Super image.

Cool photo... I really like it..
Thank you for sharing.. :)

You've captured the sheen on the brass perfectly and the close crop helps the iconic quality of the throttle really come thru strongly. Maybe it could be a little darker to lift the colours a touch more but I could argue with myself that the slight paleness in the shot evokes a faded past.
Mikel.