TE 310 diagnostic

Hello, I am in the uk in Cheshire and I am looking for someone to put my 2011 TE 310 on a diagnostic, it starts then cuts out and will not rev. I believe the throttle position sensors give problems if not reset regular so wondered if this may be the problem.

It has a husky power pipe on and the oxygen sensor disconnected but still has the standard injector (yellow) and standard ecu, would this cause running issues.

I have had the bike a year and it ran ok but then started to cut out after travelling a few miles, if it was left for a few minutes it would start again and you could continue but it would cut out again. I have changed the fuel filter, checked the fuel pump, renewed the plug, lead and cap and cleaned the tank. It now starts easy but cuts out and will not rev up so cannot be used at all. When I first started it after fitting these parts it started and revved and seemed ok but now not.

Any help would be appreciated and suggestions of someone with the diagnostic software, I think SS racing in Shrewsbury may be able to help and I am going to give them a call but wondered if there was anyone closer to Cheshire?