xj650 turbo boost gauge problem

[Senzei]

Hi anyone know how to check 1/turbo working 2/the connection from the turbo yp the boost gauge, as when started the boost gauge does nothing. So is this a connection or turbo not working.

[Cynic]

Moved to workshop..

Might want to say hi with a bit about yourself.

[wild foamy]

Could be anything

I'll give ya £200 for the bike...