Sonic carb cleaning?

[darrsi]

I think i read the thread about a home made sonic cleaner, so wasnt going to build my own.
I had a good look at the carbs at lunch and they are pretty dirty on the outside, i cant see how he could of removed them and not given them a clean to at least make it look like he had worked on them?
The bike is certainly running worse, so i am not entirely sure what he did, and because he is not back until the 13th i have just got to wait, but as with most people on here, you get to know your bike and all its noises and issues and its definitely not right.
What he will do about it remains to be seen and whether he will resolve the problem is another? but there are a few other garages by me, one being a Yamaha main dealer (which i would imagine is going to be expensive) and a few other small places.
The Yamaha one mentioned clearances and  stuff but to the cost of over £350 to sort it, although he did say a pressure test would help to see what the problem is should it be that??
The dyno i had last year showed the bike to run lean at 5 - 7k revs and they suggested a dyno kit/rejetting which i know a few people on here said is a waste of money and as the bike if getting on a bit now i dont want to be investing a ton of cash into her when it might be easier to just get another one, but you never know if the one your getting has more inherent problems than the one you already got.

If all else fails miserably, as a last resort consider a good working 2nd hand set of carbs, don't start chucking money at it.