Hi all,
For the last few years I've been the neglecting owner of an '87 GSXR250 (GJ72A), it never really ran all that well and never sounded too healthy.
These things have two "dual throat" Mikuni CV carbs, each carb fuelling two cylinders, below is an exploded diagram of them.
Recently I decided to put some love back into the bike and dismantled the carburetors and cleaned out the pilot jets, main jets, and inspected the slider assembly. The slide holders (Diagram Position #4) were buggered and quite loose, but for some reason stuck solid with a 90 degree rotation, obviously not ideal in the long run but it works for the minute, they're on the list to be replaced.
A few of the sliders (Diagram Position #3) also have chips in them, and appear to be damaged where the slide holder fits to them so I'd like to replace them too, while inspecting I noticed that the sliders all have a number printed on the top of them.
Both pairs of carbs I own seem to have a mix and match of them.
My spare carbs as seen in the pictures have 2x #1, 1x #3 & 1x #2
My carbs currently fitted to the bike have, 3x #4 & 1x #3
Does anyone know the relevance of the number on top of the slider?
I thought perhaps it might be a sizing difference,
or for matching which cylinder it belonged to when first assembled.
Bookmarks