The Weber wins over the Mikuni. They flow better, they have better economy and response as a result and are far more forgiving to work on. You could get another serviceable Mikuni that is a lot newer, rebuild it and swap it for your dead one. If you can rebuild it yourself it'll save you some coin but these @!#$ing things are not for the faint of heart to pull down if you're neither patient or experienced with carbs.
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