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Does anyone know the actual bore and stroke of a 1914 model 10F? We're doing the final round of fact-checking prior to creating the labels for the Brisbane motorcycle exhibition https://practicalmotoring.com.au/mot...and-guilfoyle/, comparing the information provided by lenders with that we had determined ourselves. In most cases where there are discrepancies, it's a matter of differences in rounding (e.g. a lender listing 500 cc vs. an actual 499 cc). However, things get "interesting" with the Harley-Davidsons.
I have 10 ft of Harley-Davidson books in my library. Unfortunately, as I already knew, all but a few of the authors of those books were simply lazy, for whom the term "fact checking" clearly means copying from whatever is closest at hand. or just making it up. Assuming, for the moment, that the books that only list the engine size for a 1914 bike (which most don't even bother doing) are correct, it's either 60.33 cu.in. or 60.34 cu.in. With this in mind:
Two books list the bore and stroke of that engine as 3-5/8" x 3-1/2". That's 72.24 cu.in.
Another book lists the engine as having 3" x 3-1/2" and 61 cu.in. An engine of that bore x stroke would have 49.5 cu.in.
Another book has 3-1/2" x 3-5/16" and 60.34 cu.in. That's 63.74 cu.in.
Another book has 3.43" x 3.50" and 60.33 cu.in. which is 64.68 cu.in.
Since most Harley books contain no useful information at all, it requires looking through a half-dozen books to find one that lists something seemingly-useful, then calculating the engine capacity and finding the data given in that book is wrong. Sigh...
Anyway, I would really appreciate knowing the actual bore and stroke of that engine. Thanks!
I have 10 ft of Harley-Davidson books in my library. Unfortunately, as I already knew, all but a few of the authors of those books were simply lazy, for whom the term "fact checking" clearly means copying from whatever is closest at hand. or just making it up. Assuming, for the moment, that the books that only list the engine size for a 1914 bike (which most don't even bother doing) are correct, it's either 60.33 cu.in. or 60.34 cu.in. With this in mind:
Two books list the bore and stroke of that engine as 3-5/8" x 3-1/2". That's 72.24 cu.in.
Another book lists the engine as having 3" x 3-1/2" and 61 cu.in. An engine of that bore x stroke would have 49.5 cu.in.
Another book has 3-1/2" x 3-5/16" and 60.34 cu.in. That's 63.74 cu.in.
Another book has 3.43" x 3.50" and 60.33 cu.in. which is 64.68 cu.in.
Since most Harley books contain no useful information at all, it requires looking through a half-dozen books to find one that lists something seemingly-useful, then calculating the engine capacity and finding the data given in that book is wrong. Sigh...
Anyway, I would really appreciate knowing the actual bore and stroke of that engine. Thanks!
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