Dear viffer gurus help :
Today when i was riding the bike started "buggning" by 7000rpm. The gasoline was new and i've covered 100km yesterday without any problems. After a while the bugging crept lower down in the rpm-register to about 5000rpm. With further more new petrol the issue was still there.
Haven't got the chance to look at the spark plugs yet (i was out on thin anf long 21mm socket).
Do you have any ideas? I've planned to check: sparkplugs, gasfilter, drained the tank on any debrie, clean the airfilter. But what more?