Carb jetting on a 74 Z1

I checked the guts of the carbs (which I believe to be stock) on my newly bought 1974 Z1 and was surprised by what I found. The bike was running like crap when I got it - too rich at idle and too lean everywhere else. The bike has the stock 903cc engine, pod filters, and a Kerker 4-into-1 exhaust. My Clymer manual states that this is the correct setup:

Fuel level - 3.5 mm
Float level - 24 mm
Main Jet - 112.5
Jet Needle - 5J9 - 3rd
Needle Jet - P-8
Throttle Valve Cut - 2.5
Pilot Jet - 20
Air Screw - 1 1/2

This is what I found:

Main Jet - marked 10.5?
Needle Jet - no marking
Pilot Jet - 17.5

My camera crapped out, otherwise I'd take pictures. Like I said earlier, from everything I've seen or read, these are in fact the stock carbs, with a bore of what I measured to be an I.D. on the engine side of 29mm and an I.D. on the filter side of 40mm.

Does anyone know why the carbs would have jets like this, or what application this would serve?

...anyone have at least a little feedback for me?

I am not an expert but this might help classickawasaki.se/Tekndokument/vmmanual.pdf

Give the experts on this site a little time one of them will chime in...Russ

Bump..I think if you post a picture someone will help out...Russ

Here's a link to Z!E's carb info.
Click > Z1E carb info

Check out the pictures and scroll down to the following chart:

28mm (VM28SC) Z1 & early Z1-A
Main Jet 112.5
Air Jet 1.0
Needle Jet P-8
Jet Needle 5J9-3 - last number is the clip position where 1 is at the top of the needle (leanest) and 5 is at the bottom (richest)
Throttle valve (slide) 2.5mm cutaway
Pilot Jet 20.0
Air Screw setting 1 1/2 turns out

28mm (VM28SC) Late Z1-A & all Z1-B
Main Jet 112.5
Air Jet 1.0
Needle Jet O-8
Jet Needle 5J9-2 (last number is the clip position)
Throttle valve (slide) 1.5mm cutaway
Pilot Jet 17.5
Air Screw setting 1 1/4 turns out

Good Luck!

Carr, Pic's would help, I thought 900's & early 1000's used vm 26's , you could have vm 28's, or (not to get hopes up,) a set of 29 smoothbores. Luck G

Z1's used 28's without the pump, kz 900s and some kz 1000's used 26mm. Some kz 1000's used 28mm with the accelerator pump, like the z1r for instance.

Carr_113; Here's my two cents worth on the jet marking question. As far as I can tell the main jets are marked by the diameter of the thru hole, measured in millimeters. I've seen aftermarket (non mikuni) jets with the decimal point in the wrong place. That may explain your 10.5, which might be 1.05 mm. When you get down to the thousandths (0.000) of a mm, it is impossible to measure with common tools. Your 112.5 main is really a 1.125 mm diameter. This doesn't seem to work with the pilot jets as a 17.5 doesn't measure 0.175 or 1.75 mm. I'd like to know whats up with that. Always learning. Ride safe, Steve

Thanks to everyone for your replies! I finally got a camera that works and have taken some pics to try and identify these things.

another

3/4

side