I’ve never taken the time to investigate why the white floats in Dell’Orto carbs seem to have such a high rate of failure, but they do. Nothing is 100% guaranteed or bulletproof, so even other floats will still have some level of failure, but I see more of the white floats ending up perforated than I do any others. Is it because there are more white floats in circulation and therefore, as a percentage, we are bound to see a higher number?
Who knows (I’m sure somebody does) but regardless of the reason why they fail, Dell’Orto seems content to send the majority of its carbs out with them so all you can do is run them until they fail.
When I’m buying replacement floats, I go for either the black Dell’Orto floats or the red MB ones, they both seem to work very well and I haven't seen any failures with either yet. The MB ones are self-explanatory, but the black Dell’Orto ones need to have additional consideration, as they use a different plastic to the white ones, and therefore have a different buoyancy for the same weight, hence I usually
