The FCRs have no choke.
But they do have accelerator pumps, so a couple of twists of the throttle before starting provides the necessary extra richness.
I'm somewhat following Dukedesmo's lead but I've always thought that my std carbs could use a fast idle provision, just so I can leave it warming up from cold without my hand on the throttle.
While I'm fitting the FCRs, and since they need a different throttle anyway, and since I fancy the simplicity of a single cable throttle (which the stronger return springs on the FCRs will allow) I thought it was well worth a try.
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