Depend on the size of your motorcycle engine. But 120A is plenty for a motorcycle. If you look at the main leads on your existing battery, you know those wires are too small to handle 120A.Spence /1/ wrote:I'm not sure what amperage my starter draws,but I think a 120A pulse (10 sec) would start it no problem.
I'd love to get my hands on one of those so I can explore their BMS. I hope their BMSs are better than the junks we have in ebike batteries.Spence /1/ wrote:Link to technical specifications of similar pack: http://www.partscanada.com/files/produc ... 0flyer.pdf
Standard Charge: 2A @ 13.2-14.4V for approximately
45 minutes or until the battery registers 14.4V.
Do not charge a Ballistic Performance Component
Battery above 14.4 Volts. This could damage the
Spence /1/ wrote:So it is indeed feasible to make a a123 pack using 4 cells to start a 400cc 1980 yamaha XS400; with the only modification to the battery pack is a overcharge protector? (possibly a discharge protector just in case would be nice also) This pack should have enough juice to run the starter for 2.5min just to give you an idea of the dependability.
frodus wrote:And 120A for 2.5 minutes is ~5Ah....
That's not possible unless your bike generator/alternator is broken. 12V is not enough to charge a 12V lead acid battery. Around 13.7V is usually the minimum. The generator/altenator voltage for motorcycles and cars usually vary with the engine rpm. The 12V you saw is probably at or around engine idle speed.Spence /1/ wrote:It looks like the rectifier on my bike is regulated to put out 12v constant, so all I really need to do is hook up a 4s pack and it will be good to go?
Spence /1/ wrote:also im still confused about the balance charging method..
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