I just replaced the wire to the enrichener (choke) on one of the carbs on my BT7 tricarb. After around half an hour of fiddling, trying to get the wire into the small hole in the wire nipple (without loosing the nipple) it struck me that the task is much simpler if you lift the lever on the carb to the upper position first. This may well be obvious to many of you, but if this post can help someone else to save the time and effort it is worth posting.