XT600 and London's ULEZ?
 

London has this ULEZ scheme which states that a bike has to meet Euro 3 emissions standards, ie its emissions must not produce a Nitrogen Oxide (NOx) value of more than 0.15 grams per kilometre. If your bike doesn't meet this, you need to pay £12.50 to ride in central London, and in 2021 when they extend the zone, the same amount to ride in greater London. Older bikes made before the Euro 3 could still be exempt if your bike's manufacturer can produce a certificate of compliance proving it produces less than this, or if you get it independently tested by an approved body.

I couldn't get this figure from Yamaha for my 01 XT600 as they said they never ran those tests on the model, but there's one place that does independent emissions testing which can create an exemption for your bike. Is there any chance of my XT600 (in either stock or modified form) of getting an exemption or would it be a waste of money? The test is £175.

Response I got from Yamaha when I asked for emmissions figures:

same story here in Milan, essentially if its not a rather current M.Y. bike, your f#$%d!
Over 30 years old bikes get here a 45 days per year pass when they can enter, but anything between them and a Euro 4 is not kosher anymore.


I get away with it with my 2004 car as it runs on LPG, so it's allowed.
This and the fact that im a 10 mins bicycle ride from work solve it for me, but yes, these stupid laws (for us) are closing on all of us in Europe.

Damn shame. Over here bikes made before 1979 are exempt from the emissions zone as well as MOTs and road tax. If I could afford keeping more than one bike I'd give serious thought to getting an older machine to stick it to the man.

I wonder if making the bike run richer by stuffing the airbox or adjusting the carbs would make it pass the NOx test.