turbo boost gauge

Hi all been along time my machine has been away for 21 months :x
She is back, must say the guy who worked on her has not been the most helpful but wanted loads of money, taken her out today, starts up well.
When moving of needs a fair bit of throttle, almost sluggish.
This maybe because the engine needs to be run in, maybe the fuel is not great, anyway filled up with new.

So after countless amounts spent around 3 years of the road at least she now goes, one thing I noticed was at no time did the boost gauge move, so how do I know that it works and the turbo, can anyone help, have no more money and not sure what to do. on the turbo/gauge problem.
Attached is a picture of her with a new paint job.
Anyone got any ideas of what she is worth.
:cry
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looks good mate, anyone's guess how much its worth.
I would suggest that its the pressure sensor, check the pipe that's connected to the front side of the carbs and this goes down to the pressure sensor that's under the battery

 

Will give it ago, thanks for the info bud