Took my standard 3 door cossy for its first MOT for a good few years today, and its basically running really rich. I can clean the black sooty plugs and it will be fine for a while and then soot up again and start misfiring.
I got the MOT tester to stick it on the machine and it was registering 9.9 somethings at idle, whereas it should be around 3.
I'm hoping it is something simple as the car is not taxed or tested so I cant take it anywhere to get it sorted. The car has only done 2000 miles in the last 14 years so the problem could be related to the lack of use.
Thanks