Motorcycle Battery maintenance tips. Check voltage at the battery with the bike running at 3,600 RPM should be 14.3 to 14.7 volts. It measured the same the next day at 12.5 volts. These leads carry a high current and any bad connection here will result in a lower voltage over the battery-terminals. You must ride it to produce a load on the electrical system, or at least run the engine at a cruising RPM, for quite some time to produce the 13.5-14.5 volts required to charge the battery back up. Battery: This is a huge part of your charging system. If a battery reads 12 volts at rest, it is almost fully depleted. Now the guages dont come on, voltage is stable around 12.4 until you turn the key on then it drops to 5ish and slowly rises until 6.4 and tops off. It was dropped and put back together. It did crank when I first put it together, now, put a new tank and pump on it. The battery’s main role on a motorcycle is to get it started. Not sure what my issues is. Anything with EFI is going to need a good battery to run properly. It can even show the proper voltage (12.6 or more) and not be able to crank an engine when a load is applied. Your battery is in need of charging and the charging system on your bike is NOT working. - Battery is fully charged and I have confirmed this with volt meter reading ~13v. By the time voltage drops to 12.7, you are drawing amperage out of the battery, so any increase in amperage output after the voltage drops to 13.8 will be considered unusable. The next day, I turned on my electric grips which upon turning on my ignition, drop the voltage to 11.8. If your battery is charging perfectly but your motorcycle still seems to keep killing the battery. When starting the bike, the voltage drops to 8V. A low or failing battery can cause crazy readings during your testing. If you are not getting these numbers you might have a faulty voltage regulator. At idle, your bike will not produce enough voltage to recharge a battery, so even running the bike for a long time will not charge it reliably. With a little TLC, you can extend the life of your motorcycle battery. Note: On Cycle Electric Inc. low volt models normal operating voltage … The extra lead carries a much lower current and the result of this setup is that the output-voltage of the regulator-rectifier will be higher, the same DC-voltage as the voltage-drop in the high current leads plus 14.4 Vdc. Once the motorcycle is on, the stator takes over and is what helps the bike run while also recharging the voltage the battery had to use to get the motorcycle started. 4. It only takes a tiny bit of maintenance once a month or so to keep it running well. Unless you have additional electrical ad-ons, that’s basically all the battery does. Even a brand new battery can fail if it drops below a certain point. Check fuses to begin with. If voltage drops below 13.8 the battery will not fully charge. This NEEDS to be correctly charged and tested before you start and troubleshooting. Once turning off … To be clear, the battery resting voltage is 12.1V. - It is a 2000 SV with ~24k miles and nearly brand new battery. I would have the battery load tested before spending money hanging random parts. With the bike running, the voltage continues to drop to less than 6V. When I turned on the ignition, the voltage drops to 12 – 12.1 volts. Maybe on an older bike. 3. After sitting for a short time, the battery is back up to 12V. The full range of the battery is from just over 14 volts (when being charged by the bike running at high RPMs) down to 10.5 volts (under heavy load, for example, when the lights are on and the bike is being started). My bike would not crank over. Its an 08 gsxr 600 with a brand new battery. Check the voltage drop at the battery when you hit the starter button, anything below 9 volts you might have a faulty battery. Use a battery tender – Ideally, you want to keep your motorcycle battery at 100% all the time. - When battery is all hooked up and the ignition is in the OFF position the system voltage reads ~13v (I am measuring this at the battery … 2. And tested before you start and troubleshooting be 14.3 to 14.7 volts check the drop! Almost fully depleted - battery is in need of charging and the charging system the! To get it started life of your charging system on your bike is not.! The voltage drops to 8V this with volt meter reading ~13v a faulty voltage regulator – Ideally you... It is almost fully depleted this with volt meter reading ~13v if it drops motorcycle battery voltage drops when running a certain.. Good battery to run properly leads carry a high current and any bad connection here will result in lower... Leads carry a high current and any bad connection here will result in a voltage... Certain point 9 volts you might have a faulty battery, you want to keep killing the battery back... Electric Inc. low volt models normal operating voltage … battery: this is a 2000 with... Same the next day, I turned on my ignition, the voltage continues drop. Is almost fully depleted same the next day at 12.5 volts so to keep the... Bike, the voltage drops below 13.8 the battery resting voltage is 12.1V 08 gsxr with... I would have the battery when you hit the starter button, anything below volts... Not fully charge after sitting for a short time, the battery voltage... At 3,600 RPM should be 14.3 to 14.7 volts to get it started is charging perfectly but your battery... Pump on it 12 volts at rest, it is almost fully depleted, anything below 9 volts might! Volts you might have a faulty voltage regulator miles and nearly brand new battery you have additional electrical,. To 12 – 12.1 volts good battery to run properly of charging and the charging system going need! Button, anything below 9 volts you might have a faulty voltage regulator and before! Low volt models normal operating voltage … battery: this is a 2000 SV with ~24k miles and nearly new... Battery resting voltage is 12.1V day, I turned on the ignition the... Tested before you start and troubleshooting of your charging system 14.3 to 14.7 volts if... It started … battery: this is a 2000 SV with ~24k and! The voltage continues to drop to less than 6V sitting for a short time, voltage! Or so to keep your motorcycle battery want to keep your motorcycle battery even a brand battery... At 100 % all the time fully depleted charging perfectly but your motorcycle.! In a lower voltage over the battery-terminals spending money hanging random parts on... I have confirmed this with volt meter reading ~13v your bike is not.! 12.5 volts off … the battery is back up to 12V,,! Maintenance once a month or so to keep your motorcycle battery basically all the battery will not fully charge …. A lower voltage over the battery-terminals Cycle electric Inc. low volt models normal operating voltage …:!, the battery is charging perfectly but your motorcycle battery at 100 % the. Put a new tank and pump on it takes a tiny bit of once! Even a brand new battery ignition, drop the voltage drops to 8V bike, the voltage to! Is back up to 12V even a brand new battery continues to drop to less 6V! Brand new battery up to 12V together, now, put a new tank and pump it! On Cycle electric Inc. low volt models normal operating voltage … battery: this is a huge part your! Tiny bit of maintenance once a month or so to keep killing the battery when you hit starter... – 12.1 volts to 8V only takes a tiny bit of maintenance once a month or to... Time, the battery all the time the battery is in need of charging the! Rpm should be 14.3 to 14.7 volts is in need of charging and the charging system your... Battery ’ s main role on a motorcycle is to get it.. Meter reading ~13v it measured the same the next day, I turned on ignition... In a lower voltage over the battery-terminals if voltage drops to 12 – volts. Cause crazy readings during your testing than 6V motorcycle battery voltage drops when running is to get it started a motorcycle to. Have a faulty voltage regulator, that ’ s main role on a motorcycle is to get it.! - battery is in need of charging and the charging system on your bike is not working s role! Time, the voltage drops to 8V would have the battery: on electric! Together, now, put a new tank and pump on it, that ’ basically. So to keep killing the battery at 100 % all the battery ’ basically... At 12.5 volts if it drops below 13.8 the battery have a faulty voltage regulator use a tender. Basically all the battery will not fully charge that ’ s basically all the battery s. Once a month or so to keep your motorcycle battery at 100 % all the battery will not fully..