To get a bit technical, the exact voltage is 12.6. The good news is that all you really need is a few minutes of a good run on the motorcycle for the battery to get the full amperage it needs to recharge for the next start up. A sad fact in a motorcycle’s life is that motorcycle battery issues are generally only addressed when it is too late (i.e. When the lights are on the battery seems to lose charge even when the engine is running. 5) Use a multi-meter and test your battery’s voltage range. Avoid jump-starting a motorcycle with a car. We’ve discussed that the most important function of a battery on a motorcycle is to get it started. Now, switch your multimeter to read AC voltage. It is a one-stop shop for all your DIY motorcycle repair information needs. A motorcycle electrical system is created to keep a good battery topped off but is not designed to charge a dead battery. The battery becomes fully charged when the motorcycle is full-on running. While it is necessary to have one car running when trying to jump-start another car, motorbike batteries donât require the same amount of energy, so the car should be left off for the duration of this process. With that being said, many may wonder if it’s good for a motorcycle to rev it like this. If it reads below those values then your battery is not keeping a full charge. So,... My name is Kyle Cannon and I love everything about motorcycles. There are some basic principles about the battery that are easy to follow, but other parts can be a bit more complicated. Check out the HappyWrench Motorcycle Repair Link Database. 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). With charger unhooked voltage reads 13.85. The World's Happiest DIY Motorcycle Repair Blog, Motorcycle Wiring – 10 Pieces of Advice for Your Next Project, The Perfect Hurricane Motorcycle Part 6: Portable Solar Panels, Motorcycle Wiring Simplified – The Basic Diagram, How To Identify The Mikuni Carburetor In Your Motorcycle, Metzeler ME 888 Vs. Michelin Commander II: Which Tire Is …, A Quick Guide To Motorcycle Chicken Strips. This blog is where I report everything I’ve learned about motorcycles and what I continue to learn. When I first started riding motorcycles, I would always look at the battery first if any of my bikes had trouble starting. What Every Rider Should Know. Battery: This is a huge part of your charging system. They are only called this to distinguish between other types of batteries. After turning ignition off the voltage held at 12.85 v. Fully charged and in peak condition, each cell has a voltage across itâs terminals of 2.1v. 8. However, itâs important to note that normal riding may not be enough to fully charge the battery â¦ Good preventative maintenance is simply to change a battery when it gets close to the end of its serviceable life. You may ask yourself that if a regular run and normal RPM’s is what charges the battery, what will constant idling do and will it help the battery at all? Q. I have all sorts of electrical problems with my bike. They can be expensive, so it makes sense that a rider will do everything they can to prolong the life of the battery on their bike. 12.6 volts is considered a 100% charged battery, 12.4 volts is considered 75% charged, and 12.2 volts is considered 50% charged. The battery really has no essential function while the bike is on. The battery is there to power the electrical components of the bike when the engine is not running. This is designed to have an output of about 15 volts. Why Do Motorcycle Tires Cup? What you are looking for is â¦ amzn_assoc_placement="adunit0";amzn_assoc_search_bar="true";amzn_assoc_tracking_id="happywrench-20";amzn_assoc_search_bar_position="bottom";amzn_assoc_ad_mode="search";amzn_assoc_ad_type="smart";amzn_assoc_marketplace="amazon";amzn_assoc_region="US";amzn_assoc_title="Shop Related Products";amzn_assoc_default_search_phrase="motorcycle battery";amzn_assoc_default_category="All";amzn_assoc_linkid="eb9b23c213b2a78013f0801eb326cc09";amzn_assoc_rows="1"; If youâre readings are significantly higher or lower than these then it would indicate a â¦ So if you didn’t have much of a problem getting your motorcycle started, you’ll know the battery is okay. If the battery was dead before, it’ll go back down to whatever low voltage it had before getting started. With a little TLC, you can extend the life of your motorcycle battery. You can do this by revving your motorcycle a little while you’re at an idle. If a battery reads 12 volts at rest, it is almost fully depleted. By your bike just sitting there idling, you’re probably putting in less than one amp. This site is owned and operated by Cannon Entities LLC. However, there are some signs a battery is dying and needs some attention. Knowing how a battery works on a motorcycle can make life a whole lot easier for any motorcyclist. If you have any comments, questions or have other ideas, please reach out via the Contact Page. Content is king and will continue to be rolled out. For example, a fully charged battery at rest should be between 12.6 and 12.75 volts. Motorcycle Battery maintenance tips. However, revving a motorcycle engine too much (meaning for a long period of time, longer than five seconds per rev) then you can start wearing out the engine. Perform a current draw test There are a few things you can do if you wish to provide a little bit more amperage to your battery if you find yourself doing a lot of city driving and have to idle your bike frequently. We think of motorcycle batteries as being 12V, but they actually hold more and more is required to start the bike. Moderation is key, so occasional revs to give that battery a boost should suffice. Step 5. The battery is a 12.6 volt battery. More specifically, the carburetor may have a vacuum leak which means there’s too much air in the air-to-fuel ratio the carburetor is giving the engine. The primary battery voltage is dictated by the chemistry of the lead acid cell. Okay that’s it for sleuthing on your motorcycle battery. Replace the voltage regulator if the reading is higher or lower than the 13.5 to 14.5 volt range to prevent insufficient or excessive charging. the battery is already dead and/or you are stuck on the side of the road). The relationship between your motorcycle battery and engine functions much in the same way as a car battery. Most motorcycles require a 12 volt battery. This NEEDS to be correctly charged and tested before you start and troubleshooting. Technically, a motorcycle battery does charge while the motorcycle is idling though it does not provide as much amperage as when the motorcycle is at higher speeds. It only takes a tiny bit of maintenance once a month or so to keep it running well. Slow to turn over the bike? Revving the engine will provide additional amperage to the battery than just a simple idle, but not as much as it would during a normal ride. One common misconception people believe is that a 12-volt battery is actually a 12-volt battery. Is your battery giving you issues? The car battery will not fry your motorcycle battery. 2. This sort of “test” really requires “knowing” your bike. Didn’t find what you needed in this particular post? A constant reading of 13.5 to 14.5 volts should be present. 4) If you go to start your engine and it “struggles” more than usual, it is possible your battery is not holding a sufficient charge (hovering too low in the acceptable range). Batteries can really only handle this a couple times before being unable to take a full charge again. 3) You have discharged your motorcycle battery completely several times. This site also participates in other affiliate programs and is compensated for referring traffic and business to these companies, link to Why Do Motorcycle Tires Cup? During an idle, the stator is outputting a small amount of excess amperage that will provide that little charge to the battery, but not enough to do a full complete charge. If you take a digital reader and connect it to the battery while its running it’ll say something along the lines of 13, 14, or 15 volts. Say you are stuck in stop-and-go traffic, you’ll still be using the throttle several times to move the bike forward those few feet. Start the engine and check the voltage while doing so. Motorbike batteries are made up from a combination of such cells connected in series to give the required voltage. Does your battery seem to be going bad? Christopher was born in a small-town NY and, over the years, owned a couple dozen different motorcycles, ranging from cruiser to enduro, Japanese to American. 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. Use a battery tender â Ideally, you want to keep your motorcycle battery at 100% all the time. As the rev's increase (e.g. The stator is always outputting the 13-15 amps, but the more revolutions inside the engine provides more voltage. If the battery begins to hold and then steadily drops in voltage, there is a problem. 0. A healthy motorcycle charging system puts out about 14 volts at 2,000 rpm, and a lithium battery needs between 13 and 14 volts to charge. link to Does The Battery Affect Motorcycle Performance. Video-Is your Harley-Davidson or other brand motorcycle seem to be cranking over slowly when starting? This is the proper voltage that will allow the battery to recharge properly. If your battery is getting old and starting to have issues, you'll probably wonder if it has any affect on your motorcycle's performance. While the starter is spinning, observe the voltage. The alternator is fitted with a regulator that charges the battery while you ride. Understanding this concept may seem a bit complicated, but if you keep reading I can explain exactly what happens with the battery during an idle and what you can do to optimize the power your motorcycle provides. The carburetor may also have a fuel leak which leads to the engine starved from the right amount of fuel it needs to run efficiently. If you enjoyed this blog post, please like or share on Facebook, tweet on Twitter, or like on Instagram. He started HappyWrench in 2017 as he wanted to share his passion for motorcycles with other people. Place the voltmeter leads to the battery terminals. You can test the bike while it is off to see if the battery sits around 12.6 volts at rest, or you can run the bike and test voltages through a range of RPMs. As long as you get those several minutes in of a good run on the motorcycle, you shouldn’t have to worry about how much idling you’re doing. How can I tell if a flat car battery is charging when hooked up to a trickle charger? If the voltage drops below 9.5 volts while starting the engine, it means that one of the battery cells is â¦ A battery tender for a motorcycle is a device that plugs into any standard AC wall outlet and transfers power via amperage to a motorcycles 12-volt battery to keep it charged. For more information as to why a motorcycle struggles idling or sputters, see my other article by clicking here. Knowing how the battery is charged is important. Tires are one of the most important things on any vehicle in regard to performance and safety. If the voltage instantly drops to 0 volts, that is also a problem. That is such a small amount that if you let your motorcycle idle for 10-15 minutes, you’re really not charging your battery all that much. when the bike is being ridden), the voltage level being put back into the motorcycle battery increases to around 13.5 to 14.5 volts and it's the extra power being produced when the bike is being ridden that charges the battery. Help diagnosing start up/battery drain problem. When your engine starts running, pull in the clutch and apply some gas. We know that idling does charge the battery, but not to the amount it fully needs in order to completely recharge the battery. If this system was in a restored 1966 GT coupe, I would probably change the regulator to reduce maximum alternator voltage. A healthy 12 volt motorcycle battery should maintain a range from 9.5 - 10.5 volts under the load for a good 30 seconds straight. In 1999 I was riding a rented Harley that diedabout four hours after leaving the rental office. If you intend on doing this for longer periods of time or doing it several times in one day, be sure to give the motorcycle a good few revs while it’s stationary so you can ensure that battery gets the charge it needs. The battery is a 12.6 volt battery. When running at a normal slow cruising engine RPM, the voltage across the battery terminals should stay over 14.3 volts even with full load, like lights, heater blower, and everything else, running. When a motorcycle has an issue running, a safe assumption would be issues with the battery. The word revving is short for revolutions per minute that’s happening inside the engine. I’m currently working as a mechanical engineer and I’ve been able to restore over a dozen rides. What Voltage Should A Motorcycle Battery Read When Running Uncategorized February 7, 2019 0 masuzi How to test a motorcycle battery revzilla should i replace my motorcycle battery how to test a motorcycle battery revzilla motorcycle battery voltages and what The output from the stator on most modern bikes is three phase (hence the 3 wires) alternating current at a peak voltage well over the 12-14V DC voltage that your electrical system requres. Motorcycle Battery Maintenance. Lastly, the carburetor could potentially have a timing issue which means the air/fuel screw needs to be adjusted. Myths About Engine Coolant and When to Replace It. If your battery is charging perfectly but your motorcycle still seems to keep killing the battery. With ignition on and engine not started it measures 12.85 dropping rapidly to 12.70 within 15 seconds. During a normal ride, a motorcycle provides about 13, 14, or 15 amps while idling only provides less than 1 amp. If you’re searching the query about whether or not a motorcycle charges the battery during an idle, you may have run into issues during idling. On a good battery, the voltage will drop to around 10 to 11 volts as you start the engine. 2) You have been regularly letting your bike sit for long periods without running it (a motorcycle battery will lose about 1% of its charge per day when not run). While the battery is often the culprit of issues a motorcycle can have, it likely isn’t your problem in this case. The voltage, when the engine is running, should be in the range of 13.5-14.7 volts. Batteries have a finite life, so try to keep track of when your last battery was installed (check for date stamp on battery). Motorcycle battery - correct voltage running and stopped? After a day on the charger the battery measured 14.88 volts with charger attached. Click here to learn more about what happens when you rev a motorcycle engine. What is the voltage of a âdeadâ 12-volt battery is different from what is the maximum charging voltage of a 12-volt batteryâ11.9 and 13.2 are numbers you want to watch out for in the future. And it has to do this in order to charge the battery while the bike is running. AGM batteries may have slightly higher voltage readings after a full charge. 1) It is more than “4-ish” years old. If your bike produces less than that because of a tired charging system, the lithium battery will not charge, and it â¦ Similarly, you may just be starting up your bike to brush off some dust and not really need to take it anywhere. This is done by either keeping it in a neutral gear and twisting the throttle to 3,000-4,000 RPM or adjusting the air/fuel screw on the carburetor so it has a higher idle. In moderation, revving a motorcycle engine isn’t bad. Most motorcycles have something called a stator. On almost every motorcycle you will find a battery, used for providing power for starting the bike and for buffering an amount of electric energy. 2. When a battery charger has been disconnected from the battery for one to two hours, a fully charged Conventional battery should read 12.6 volts (12.8 volts with Sulphate Stop) or higher. 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. To say that motorcycle batteries are finicky is an understatement. Keep in mind though that if the voltage doesn’t increase at higher RPMs, this could point to an issue with the alternator. Then, measure the voltage from tab to tab, just like before. But it is such a small amount of charge that it will not be able to top off a battery, especially a battery that is about dead. ... Actually, if a batteryâs resting voltage is only 12.0 to 12.1 it means only 20 to 25% of its useful energy remains. Anon A. It turned out to be a loose connection from the stator back to the battery so the motorcycle was running on battery spark. Through the system of the stator, the battery is recharged so it can start the battery again in the future. If you are guilty of not riding, take your motorcycle out for a long ride, including a nice stretch at highway speed. What my article should tell you is if the bike is generating power and the battery is holding power. Car batteries have far more capacity than motorcycle batteries. Revving it is just making the engine do what it’s already doing, just a little faster. HappyWrench.com over the course of the past 2.5 years has grown to 4.5k+ visitors a month and is a top ranked Google site for DIY motorcycle repair (click here to see more). This might remedy the problem; otherwise, you may need to replace. Your motorcycle functions either off of a 6-volt (early 60s-70s) or a 12-volt system. We call this the open cell. When turning the key to start, all lights turn off and engine won't start. 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). The battery is fully charged, but when I go to crank it, it cranks extremely slowly, then the steady clicking sound of a dead battery. It is actually the alternator’s job to charge the battery. Itâs either a goner or it has been deep cycled, and a battery can only be deep-cycled a limited number of times before it is indeed dead. This is designed to have an output of about 15 volts. Not starting? In order to start a motorcycle, you need at least 12.2 volts, or a â¦ 6. Cannon Entities LLC is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. (The procedure for measuring the battery voltage was previously described in the multimeter section.) The job of the Stator is to convert mechanical energy from the engine back into electricity. While that is true when the bike is running, it’ll go back down to 12.6 -ish when you turn it off. Lately I have been having cranking issues. A good battery should not drop below 9.6 volts over 10 seconds or so. Most motorcycles have something called a stator. (positive to positive and negative to negative). A good battery should read between 12.4 to 12.6 volts, 12.6v being optimal. Technically, the battery is getting a charge while the motorcycle is idling. A lot of riders are aware that the battery is charged while the motorcycle is running, but some wonder if idling provides the same charge. When your car is running the cars alternator is charging the battery, this is why you should see a higher voltage. Batteries need to be used to stay healthy. What Every Rider Should Know. As RPMs increase, the battery voltage should increase closer to 14 volts temporarily as the battery is being charged. The starter should be running at normal speed. Does The Battery Affect Motorcycle Performance? Once the motorcycle is started, the stator (or alternator) takes over and powers the electrical components on the motorcycle. Hook up your DVOM in the same manner you did for the standing voltage test, and have an assistant thumb the starter. That said, we are not going to stop there. If you look at a trickle charger, most of them have a 2 amp setting or a 6 amp quick charge setting which is what your motorcycle needs at the very least to obtain a constructive charge. If you take a digital reader and connect it to the battery while its running itâll say something along the lines of 13, 14, or 15 volts. Essentially, the motorcycle is always providing more amperage and voltage than the battery currently has. The main function of a motorcycle battery is to get the motorcycle started. It should be around 12 Volts. Continue riding your motorcycle for 15 to 30 minutes to recharge the battery. Posted in automobile Tagged 12 volts , voltage If you’re like me, you’ve found yourself in occasional stop and go traffic while riding your motorcycle; this means your motorcycle will be idling a lot. If your tires start to wear and/or cup, the safety of your motorcycle is compromised. So, does a motorcycle battery charge while idling? My battery is 2 years old, and I usually keep it on a battery tender. A low or failing battery can cause crazy readings during your testing. First, measure the battery voltage with the ignition switch off (i.e. Gases from car batteries. Mileage Talks: How Many Miles Can Your Motorcycle Last? If so could be a bad voltage regulator--if so may be overcharging battery Check voltage readings at battery should be around 14.2 with car running -- if much higher than this voltage regulator is bad. Next, start the bike and run the engine at about 2000 rpm and measure the battery voltage again. The actual number of the voltage is not terribly important. To check for voltage, the motorcycle must be running and should be at about 2000 rpm. Here's how to check your motorcycle battery with a multimeter. If you are experiencing poor idle while out on your motorcycle, the most likely place the issue lies is within the carburetor. Batteries can last for several years before going bad. 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