Join Date: Jun 2013
Location: South of England
My bike was/is an American import, so in the box of bits was all the emissions junk. Michael, is your bike a UK bike or an import? you can tell by the frame number if nothing else. The overrun enrichening device is a small dome screwed one on each side of the carbs, on the left side one of the screws also holds the slow running adjuster. There is a strong spring under the dome so be careful. the rubber diaphragm needs to be intact and there is also a small o-ring to look out for. The diaphragm is attached to a plunger that should slide under vacuum power, this is what sticks, I cleaned mine with some scotchbright. The purpose of all this is to feed a rich mixture on the overrun.
One can never have too many alternative forms of transport.