Webers cost a small fortune to tune you have 4 sets of everything, jets are £5 each webers have several plus emulshion tubes air jets etc, bike carbs have one jet each that you can drill out.
As bike carbs are variable Venturi the part throttle pickup and full throttle from rest are very smooth as the manifold vacuum pulls the needle out of the jet only as much as the engine needs.
If you add up the price of webers, linkage, manifold, misab washers, jets and compare with bike carbs and a manifold, with bike carbs you can do the job for half the money.
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