Rich URQ

["DRoxburgh" <DRoxburgh@email.msn.com>]

Any ideas please?

My Ur seems to be running rich. The evidence being black coating on the tail
pipes. There is no smoky exhaust, oil consumption is non existent. Plugs 1 &
2 were black on inspection - I didn't fight to get the others out..  When
the engine is hot the revs drop very slowly from about 2000 down to one
segment when the clutch is depressed. Other wise all is going well, but I am
used to nice grey pipes. I have done alot of short runs in UK cold weather
recently, but today even after an hours hard run the tail pipes were still
dark.

Is all ok or am I burning my fuel badly?

TIA