On 10/3/2018 7:52 AM, Tim wrote:

6:40 AMMr. Luddite
- show quoted text -
I am surprised that air-cooled motorcycles can still meet emission
standards that continue to become tighter year by year.

The emission standards are becoming more stringent for motorcycles sold
in Europe as well as the USA.

Liquid cooled engines are easier to "tune" for emission control
due to their more uniform operating temperature.

...........

Not sure how they keep up with the standards Richard. My Guzzi is a 2000 and has distributorless ignition and throttle body injection but no O2 sensor or catalytic mufflers. The new ones have sensors all over...


I know that Harley has had a more difficult time meeting emission
standards with their air-cooled engines but are still managing to
do so on many of their models. Some have liquid cooled (oil) heads
and air-cooled cylinders. All new Harleys (since 2008 I think)
have catalytic converters in the exhaust systems.

The Suzuki I have is a 2008. It's liquid cooled, has a catalytic
converter and is fuel injected.