btw, few months ago i've met one guy, who used to ride ~90's xt600 during couple years.
he said that when he had one of that boots failed, he removed both, tore rubbers away and reshaped carb looking sides with tig weld to create cylindrical elevation, and, as he told, he got a "lifetime solution" about them just with some rubber tube of proper diameter and thickness..
and he sad that he hasn't noticed any later issues with performance (my question was about an impact of possible changes in gas flow through that improvised routes).
so, i plan to try his method when the time will come to change my boots. it will be well less than half price of good quality aftermarket boots.
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