Can anyone tell me where I might be able to buy Hitachi jets...
Couldn't work out why new A14 ute was running rough and having starting/idle issue...
Seems it has a 'custom' jetted carb with mostly A12 jets.
Needs slow sec and main air - or just a whole new jet kit to suit standard A14 would be good..

A12 jets suit the stock A14.... is your A14 heavily modified?

We should put together a "jet library" that we can share. I have several worn-out carbs and could the jets out of them.

These are details I have for A12, A14, A15...

CARBURETTOR
Make . . . . . . . . . . . . . . . . . . . . . Hitachi
Type . . . . . . . . . . . . . . . . . . . . . Twin barrel downdraught
Throat diameter:
Primary . . . . . . . . . . . . . . . . . . . .26 mm
Secondary . . . . . . . . . . . . . . . . . . .30 mm
Venturi diameter:
Primary -
A12engine . . . . . . . . . . . . . . . . . . .20 mm
A14engine . . . . . . . . . . . . . . . . . . .22 mm
A15 engine . . . . . . . . . . . . . . . . . . 21 mm
Secondary -
A12 . . . . . . . . . . . . . . . . . . . . . .26 mm
A14andA15 . . . . . . . . . . . . . . . . . . .27 mm
Main jet:
Primary -
A12 . . . . . . . . . . . . . . . . . . . . . . #96
A14 . . . . . . . . . . . . . . . . . . . . . . #104
A15 . . . . . . . . . . . . . . . . . . . . . . #100
Secondary -
A12andA14 . . . . . . . . . . . . . . . . . . . #150
A15 . . . . . . . . . . . . . . . . . . . . . . #145
Main air bleed:
Primary -
A12 . . . . . . . . . . . . . . . . . . . . . . #80
A14 . . . . . . . . . . . . . . . . . . . . . . #65
A15 . . . . . . . . . . . . . . . . . . . . . . #70
Secondary -
A12andA15 . . . . . . . . . . . . . . . . . . . #80
A14 . . . . . . . . . . . . . . . . . . . . . . #60
Slow jet:
Primary -
A12andA15 . . . . . . . . . . . . . . . . . . . #43
A14 . . . . . . . . . . . . . . . . . . . . . . #46
Secondary -
A12andA14 . . . . . . . . . . . . . . . . . . . #50
A15 . . . . . . . . . . . . . . . . . . . . . . #70
Slow air bleed:
Primary -
A12 . . . . . . . . . . . . . . . . . . . . . . #220
A14andA15 . . . . . . . . . . . . . . . . . . . #170
Secondary . . . . . . . . . . . . . . . . . . . #100
Power jet:
A12andA14 . . . . . . . . . . . . . . . . . . . #60
A15 . . . . . . . . . . . . . . . . . . . . . . #40
Fuel level . . . . . . . . . . . . . . . . . Marked dot on sight glass

Are those specs for North America or for Australia? The NA specifications are lean, lean, lean for emissions control.

Check out more specs: Carburetor Specifications

In Malaysia, we use those specs...