anybody got any ideas what it could be my bike pulls to 6000 rpm then powers stops sounds like the engine drops cylinders or hits a limiter as only just started doing this today HELP

I had a recent similar experience and it was a loose emulsion tube.

Sounds to me like the bike is hitting the inbuilt restrictor which is linked to the speedo.

Have you messed with the dash/clocks at all recently?

Have a look at all of the plugs around the dash and make sure they are clean and secure

all sorted now turns out the carbs where loose thanks for the help guys