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How do YOU jump start an old GS?

Up until a few years ago, my 850 was running the original stator and reg/rec. Bike ran fine, no electrical/charging issues. I went ahead and installed a SH775 as preventative measure.

Same here with my 1100E. Went to the SH775 a couple years ago just because.:)
 
I usually jump start my old GS'es with the kickstart :) ...jokes' aside:

1. New Battery.
2. Get a "Smart" Charger that uses ΔV charging, and perhaps even has a trickle-charge phase. They're not cheap, but by now (a few years on the market) they're also no longer expensive.

I can echo what has been written in this thread with regards to "charge-to-100%, then off, then again to 100%, no trickle charge": I've put Bluetooth battery monitors on each of my bike, so I detect early when a battery voltage drops below 100% SoC. Then the charger gets put on, and after a while being on 100% I'll disconnect it again.

This way, I'm even still using a battery that has a weak cell (charger even complained about it one time).

In my experience - that experience applies to contemporary batteries -, the key to long living lead-acid batteries is not to not let their voltage fall too low. That includes charging them regularly if the bike often gets short trips that don't provide enough charge to offset the energy consumed for starting.
 
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