Hi All this is my first post so go easy, i have a y reg CBR 600F4 and live just outside London in an area soon to be the ULEZ zone which will make me liable for a daily charge of £12:50, i was wondering if anyone has heard of of catalytic conversion on these bikes and what are your thoughts ?

 

Should work OK. Modern 600s come with cats built into section between header and muffler. Lots of those laying around after owners upgrade to aftermarket exhaust.

 

You can also take it to somewhere like https://www.uleztesting.co.uk/ to get it tested, there is a good chance that it will pass if maintained well. I know people with CB500's that have passed this test, then of course no ULEZ charge to Khan!!!!!!