A teflon lined bush of the correct internal diameter to repair worn su bodies when throttle shaft eats into the pivot holes.
Sold per each, but 2 required per carby.
These require skill to fit and centralise, if you are not confident we have a toolmaker who does ours, and the cost of supplying bushes and doing the job is approx $85 per carby plus shaft, butterfly if you require those. We need the carby dismantled, and approx 4 days.