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Real Classic - - Bsa 650 Project -

Now here’s a thing. Re­mem­ber how I dis­cov­ered the bent-in tub­ing be­hind the head­stock cover, where BSA’s method­ol­ogy was to bash hell out of it then cover it with a plate? Well here’s the sec­ond sur­prise of the build. I didn’t ex­pect to find a sec­ond bit of tub­ing coiled in­side the first when I cut the frame open. Maybe some­one from their days at BSA fac­tory knows bet­ter, but the only rea­son I can fathom out is that the in­ner tube was pushed in­side to act like a man­drel when the frame tubes were orig­i­nally bent at the fac­tory. Bear in mind that at each side it’s one piece of tub­ing from head­stock, right un­der the en­gine and up to the seat, some six feet or more, so it might be a cheap and cheer­ful way of stop­ping the tubes kink­ing. It goes some way to ex­plain­ing why BSAs are so heavy, too

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