run without battery...no mods

B

Bobby Joe

Been Around the Block
My little used battery is being a pain in the @$$ and won't charge enough for me to start my bike so I can tune it. Can I just kick start the bike and leave the battery out? Or could I kick start it and leave the dead battery in? Stupid electronics!
 
Bobby Joe said:
My little used battery is being a pain in the @$$ and won't charge enough for me to start my bike so I can tune it. Can I just kick start the bike and leave the battery out? Or could I kick start it and leave the dead battery in? Stupid electronics!
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You can eliminate a battery on a kick-only bike using a capacitor, but it's not always the best at low RPM for a street bike.

Might want to look at why the battery is not charging...is it a drain somewhere else on the system, or do you know for sure the battery is bad? If so, a new battery, esp for kick-start-only, isn't expensive, so why get complicated?
 
Your CB500f uses a field coil in the alternator to make power. You need some sort of battery to power the field coil or the alternator won't make any power. A little power into the alternator, lots of power out - no power into the alternator, no power out. If you had a bike that used a permanent magnet in the alternator instead of a field coil, you could run without a battery.
 
dualitymike said:
Your CB500f uses a field coil in the alternator to make power. You need some sort of battery to power the field coil or the alternator won't make any power. A little power into the alternator, lots of power out - no power into the alternator, no power out. If you had a bike that used a permanent magnet in the alternator instead of a field coil, you could run without a battery.
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Thank you for the correction. Sometimes I forget other people ride bikes that weren't built by Fred Flintstone...
 
Always fix problems before trying to modify things.
Helps with the base line, even more so if you are inexperianced.
Guys think its a waste of money, but so is having a bike that doesn't work right...
 
The bike itself isn't draining the battery. It hasn't even been installed in a while. I tossed in on the charger over night, say near 12 hours at 6 amps. I hook it up and it only turns the starter motor 3-5 times before its drained.
 
At 6 amps you just boiled your battery.
A small motorcycle battery needs only 1 to 2 amps max.
6 amps is for a full size car.
 
Bobby Joe said:
The bike itself isn't draining the battery. It hasn't even been installed in a while. I tossed in on the charger over night, say near 12 hours at 6 amps. I hook it up and it only turns the starter motor 3-5 times before its drained.
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Ouch! You need a battery tender that does 1a for charging. As stated you possibly fried your battery.

What is the aH of the battery?
 
A 750 uses a 14 AH battery, so it isn't bigger than that.

The rule is not to charge over 10% of the Amp Hour rating. So a 14 AH rated battery should not be charged with more than 1.4 amps.
 
Turns out it is a 12 Ah...so I need to charge it with a 1.4 amp charger or smaller? Wow, not sure I have seen less than 2 amps before. Good news is, I was able to connect the dead brick and kick start it. I guess I need a new battery though.
 
Actualy, 1.2 amps. As a coincidence, the Deltran Battery Tender plus is 1.25 amps, the Battery Tender Jr is 0.85 amps. I have both of them. A couple of other brands make a similar product. Don't get a trickle charger. I have a trickle charger and discovered even at a 1/2 amp, you can boil a battery dry. You need an automatic, float type charger minimum. Amazon has the Battery Tender Jr. for about $25. Worth it, IMO.

You can connect them to the battery and leave them on. My NH750 battery is from 2007. Still going strong. Getting 6 years out of a battery is better than average and I expect it to last a couple of more at least.

My CB360 battery is 2 seasons old and going strong. When left on the tender, it does not use enough water to worry. I've added a little once, and I believe that was because the motorcycle overcharges it a little.
 
Cheap way out is get a timer and only have it on charge for an hour a day ;)
Batteries are 'killed' by heat, once the teperature get over 70 F the life span goes down dramatically.
I used to get 6~8 yrs out of a battery in Britain, if I get 3~4yrs in Florida I'm doing well :(
 
I am sold on the battery tender. I used to get 2 seasons on a battery, sometimes one. With the tender, I am up to 6 already and the battery is still strong. I use it on my deep discharge battery, a couple of sla batteries I have as well as the mc.

The battery tender keeps the battery peak and does not boil out electrolyte. Easy to use too.


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