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Your notes on the Excel sheet say your batteries are rated for 44 Ah, and you're figuring 3.2V nominal per cell.
70.4 V * 44 Ah = 3097.6 Wh (or 3.0976 kWh). At 80% DoD, that gives a usable figure of 2478 Wh. At 65%, you'd get 2013.44 Wh.
AHA! FOUND IT! H/I/J 32-34 aren't quite right.
If putting all 22 batteries in series to get 70V, you don't increase the capacity at all. You've still only got 44 Ah. Voltage * Amp-hours = Watt-hours.
Cars are between 200 and 400 Wh/mile. A motorcycle is probably around the same; Ben Nelson would probably have the best numbers.
65% DoD was 2013 Wh. At 400 Wh/mile, that's 5 miles range; 200 Wh/mile, it's 10 miles range. Not even close to your 75 miles.
I'm still working out what exactly is wrong in your sheet, but I wanted to try and get a reply up kind of quick.
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