Yeah, I also used the same size cap on my 550 to go battery-less. That's 5.6 milli-farad (5.6mF), also known as 5600 micro-farad (5600uF).
(Watch out for confusion because sometimes people use mF to mean micro-farad, but that would be improper. The abbreviation for micro-farad is uF, where the u is a actuallly a substitute for the greek letter "mu" which actually looks like a cross between a "u" and an "m". Confusing enough yet?
)
You'll want the cap rated for around 50v (higher is better, but 50v should be fine).
The issue of charging the cap in one kick is a concern. Since the stock 650 with points only uses one coil at a time, it uses about half the current as the Dyna S. The Dyna S has both coils on almost all the time. Try it and see is probably the best way to find out.
If the bike is hard to get started with a good battery (kickstart, that is), it'll only be harder to start with a capacitor.
If it starts in one kick pretty reliably, then the capacitor has a good chance of working.
By the way, for anyone else reading, the battery eliminator is not eligible on a 77 650 with stock charging system. That bike needs a battery (however, it can be very small).
Post edited by: loudhvx, at: 2007/04/03 02:11