Throttle Slide for Dellorto PHBN and PHVA 17.5 carburetors.
ONLY fits the 17.5 versions!
Please note that there are at least 2 versions of this slide and that the factory literature is unclear on which one is used in which carburetor.
The best way to distinguish between the two is to measure the height.
This particular version is some 25 mm tall at the tallest point.
Available in the following versions:
Required quantity per carburettor: 1
This is item number 1 in the drawing.