more reassurance, much appreciated.:045::045::045:

I know the mot rules state that if the exhaust is louder than that of a standard car/bike ie modified exhaust systems producing more noise than the standard system is a fail but it is down to the tester to make the decision as we do not use decimeters when testing, Took mine for a test last week and it passed with ccc stubbys on no problem

page from testers manual http://www.motinfo.gov.uk/htdocs/m1s07000101.htm

I have a 2005 XTX with CCC carbon ovals, standard air filter.
I take it to an official Yamaha dealers for the MOT
Last year it passed but I got an advisory stapled to the certificate saying loud exhaust.
This year it passed, no advisory. Same dealer, same tester, same exhausts.

Just got back from holids this afternoon and had a nasty shock! My MOT expired while i was away and i was looking forward to getting out on the bike this weekend, gutted!! Anyways i got caught out as my insurance and tax lasts until the end of this month but the MOT was end of last month. O well no big deal i will just have to ring all the test center in the morning and find out who can fit me in this weekend at such short notice. I was worried about the full Stainless Scorpion 2 into 1 exhaust but it passed the MOT when i first bought it and i have left in the baffle so hoping i wont have any problems. Will report back once i get it done, or not as the case may be :-)

Just got back from my MOT. It sailed through. They didn't even look at my exhaust so i guess you can do what ya like with a bike. Great:popcorn2: