Thanks for asking.. Airfilter is not clogget. Smoke comes out when accelerating, smell is up always. In west coast Finland, we have not hills.... Fuel consumption is normal, about 6 litres/100km. Oil consuption is about 1liter/5000 kilometers.
I dont know about oil cooler. Bike is standard K100RS 1991 model. I keep oil level 3/4 of glass.
-Ike-