Forgive me if I'm being a doofus - getting on a bit you see - but there isn't a spring in the throttle is there? Just the one on the carbs?

Therefor, I can't see how the throttle will snap shut with no cables attached?

Or is it time to wheel me away for my horlics...
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MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball