More than a few motorcyclists probably like the popping and banging on the overrun because it sounds 'tough.' Similar to people who own souped up Honda Civics and adjust their fuel injection to get the same effect...Thanks Brian. I think that 1 carb per cylinder is a worthwhile improvement, given the quirks of the Vee-twin. On my Motorcycle engine, I still re-tune the carbs for idle every year, then tweak them for Spring, Summer and Autumnal use as the town idle temperatures change! For anything where I am at more than 1/4 throttle, the carburation is "sufficiently within limits" that I never change it, but after Spring riding, with stable tick-over, the bike goes off noticeably when the temperature gets over about 17deg.C, so gets re-set for Summer, then come September it needs tuning again, when the air cools, as otherwise it simply won't idle securely. And that's how it has been for the last 25 years of ownership! Also, I knew the same model of bike in the late 1980s that a work colleague owned. I spent a whole year, re-setting the idle for him almost weekly, as the weather changed! So it wasn't just my bike. And it was an 1/8th of a screw on one or other carb just to stop it from stalling, apparently at random. Then it would be fine for a week or 2 until a dramatic weather change...
Everyone else seems to manage by just setting a fast idle - that causes popping and banging on over-run. I even here it today with carburetted Harley Davisons... Their riders appear to have no mechanical sympathy for bad tuning? Of course, super electronic controlled fuel injection has countermeasures for all that...!