Registered Forum User
Ducati Corse
Posts: 3,134
Join Date: Jan 2002
Location: notts
Mood: Bloo and Yellow.. and Red now ;)
The dirt, if there is any, will be internal. When you screwed the screws in, if something is on the seat then you won't get the screw fully in.
Counting out from there, you will get a different number of clicks.