What is the proper gas-air mixture? I find it hard tuning my car. Do I need to overhaul my carburetor?
If we are talking the three cylinder CB23 engine the mixture screw is hard to get to and has an anti tamper shroud to stop prying fingers.
The Aisan carby is pretty reliable and problems with them on these engines is usually due to improper vacuum hose connections, or improperly adjusted idle, fast idle and deceleration screws.
A/F ratio is around the standard 14.7, but being a carby you will not get consistent mixtures because the jets sizes are fixed . On an EFI engine you can control the fuel flow, but not so with jets.
If you do decide to give your carby a birthday make sure you only buy the Daihatsu genuine, because the after market units have issues with quality. The minor rebuild kit part No 0421287704000 and the major overhaul kit with plunger, needles, gaskets, clips,
etc is part No 0421187729000.
If it was me I'd be concentrating on the hoses, the PCV valve, contact points in the dizzy and better spark plugs first. If you want much better idling and a bit better pull get an electronic dizzy and coil from a G200 series Charade.
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