The CDI has a brief charging period with a quick rise in voltage. Might as well know a little about what’s happening under your seat. I am assuming you tried a different spark plug. Magneto damaged. I could be mistaken, but pretty sure CDI's are either good or bad, nothing in between. In some models of bikes, Yamaha for example, the cdi or tci is repairable. Either you have spark or you don't, never heard of what you just described being CDI related, my guess would be fat jetting (overly rich). Some manufacturers give specs for testing your box pin-by-pin, but don’t count on it. your ZillaCash Rewards on a future order with us! Andy Greaser photo. Gift with Confidence! The CDI is like a computer as it controls the engine of your scooter. The basic CDI system is a trigger mechanism, coils, and a box, often black, with capacitors and other circuitry inside. Andy Greaser photo. The only possibilities left as to the lack of RPM power that were left was a lack of ignition advance from the CDI or incorrect valve timing ,caused by … That's all great, but the jump to CDI was like going from carburetors to fuel injection. Sure, particularly if your motorcycle is older, but still new enough to have CDI. The CDI box controls a motorcycle’s ignition system and allows it to start properly. This is a TCI box. These mentioned symptoms can be confusing and one has to be careful before concluding that the problem is with the CDI. (Some riders retrofit points-based systems onto their newer motorcycles to avoid the shortcomings of CDI systems. The tests will help you to identify or eliminate the stator as the problem in a charging issue. Checking all of the grounds on your motorcycle can be done quickly if you know where they all are. When issues like this happens, combustion can’t occur. Faulty CDI Problem. This solution completely bypasses the stator by … The key is eliminating every variable until only the box remains, because they’re not easy to troubleshoot. You'll also hear about special offers and events! Making it sometimes difficult to diagnose. For the purposes of this article, I'll refer to all the black box ignitions as CDI, since they all use the same basic components: box, coils, sensor. she started right up almost first kick but has bad pinging and didnt want to run, so i went back in and retarded the timing a little. Or a power valve not working properly. Most are sealed up like a sarcophagus. I even made an air trap for the oil cooler as i thought that the temperature was affecting the Ignition unit but that didn't sort the problem out. Bad stator symptoms triumph675 net forums motorcycle charging and electrical buell forum how to test your system problems yamah vision faq motorcycles diagnose re winding adventure rider triumph rat ktm 200 duke 12 generator Bad Stator Symptoms Triumph675 Net Forums Motorcycle Charging And Electrical Problems The Car Advertiser Buell Forum Stator How To Test Your… Read … or create an account A bad stator can have all kinds of funny, hard to trace symptoms. Faulty wire grounds are a very common problem, but can sometimes be difficult to track down. CDI stands for capacitor discharge ignition (alternatively, “capacitive.”) If you’re new to capacitors, they’re similar to batteries in that they can store energy for later. Only $9.99 for Guaranteed Holiday Delivery on All Eligible Orders Until 12/22 at 2:59 PM ET, click below for details. cause for each problem listed. The problem may get worse as the bike warms up. customer service page for more details. It is important to have your scooter checked by a professional so that they can tell which type is best for your make. I'm sure some go bad but I would say it is a very low percentage. WTATWTA: What is wasted-spark ignition, and do I want it. If you're lucky, you're reading this for your own education. Tell us what you love or what we need to fix. Advertisement. Without a good stator, your engine will run poorly or not at all. It is one of the common symptoms of a bad or failing ignition coil. Also check out the Spark Plug Troubleshooting guide from our friends at NGK. Most Dirt bikes are a CDI magneto, and do not require a battery. It might not even hold low revs at all. When the fuel pump has a problem, spark plugs or coil packs are faulty, you would observe similar symptoms. Andy Greaser photo. Most offer more power, and the best units come from reputable tuners. Most street bikes are a battery charged CDI, and need a fully charged battery. In a points system, the crank basically opens and closes a switch. You'll often find them lurking under your seat. A popular variation of this system is TCI, which doesn't use capacitors in the same way. See what our customers are saying about us: Earn $5 for every qualified $100 you spend. Website & Marketing by WordPress Website Pros. Compression Adequate compression of the fuel-air mixture is essential for good starting and running characteristics of an internal combustion engine. Therefore, if it is in good condition then you will have fewer or no issues with your ignition. Six Common Motorcycle Problems And Solutions. Your scooter will serve you well if you take care of all its parts. Ignition coil faulty. so when i checked them they where 6 screws out. These ignitions did just fine for decades, but those moving parts wear out over time. Create a Battery-op Ignition System for Less Than $50: The cost of a new stator can be hundreds of dollars. Yamaha RZ350's (especially 1983 and 1984 models) have a CDI problem that causes it to fail over time. the guy i bought my bike off set my bike for a older syle xj with reguler threaded pilot screws. “CDI box” is short for Capacitor Discharge Ignition box, although it is also called thyristor ignition box. Poor idling and stalling will lead up to this problem. Again, when a CDI box is about to go bad, it can lead to misfires, issues with starting, rough running or even stall the motor. These mentioned symptoms can be confusing and one has to be careful before concluding that the problem is with the CDI. Checking the voltage with a voltmeter versus relying on symptoms alone will prove highly beneficial. That battery also has to run the starter, lights, radio, and other stuff in addition to the ignition. The CDI in your scooter is linked to the ignition. A used unit from a a newer model don't work unless you replace most electrics. Or you can do it the other way. See that rectangular bump on the flywheel rotor of this Yamaha Vision? A magnetic pickup senses it as it goes by. It is easy to assume that the issue is a bad battery because of symptoms such as dimming headlights, irregular meter readings and poor starts. Check engine light is a usual suspect. RevZilla will match any advertised price on new merchandise available through another authorized U.S. dealer. Yamaha (RD350 YPVS or also called the RZ350) CDI problem FIX? The reason is that there is no particular way of testing the condition of the CDI. You can also gain power by keeping your stock box, but using an ignition advance kit to alter the trigger mechanism. Testing for a spark on many classic bikes consists of laying the plug on top of the cylinder head (connected to the plug cap and HT … Let's take a look inside. When working with CDI type ignition systems, it is very important to be aware of the high voltage discharge from the spark plug. These systems are supposed to be maintenance-free, but even a loose trigger sensor can mess with your bike’s little brain. You’ve tested everything but the CDI unit, including the charge of your battery, your spark plugs, the health of your coils, and the triggering mechanism itself. Our goal is to provide the best possible shopping experience to every enthusiast who visits RevZilla. Therefore, the only way you can tell whether your CDI has a problem is by confirming that everything else is in the right condition. It instructs the fuel injectors when and for how long they should spray. The CDI uses voltage from the motorcycle battery to … it was cause by the pilot screws. Sure, there are aftermarket options for all kinds of applications. Also the spark plug cap is a cheap and easy replacement item that causes similar symptoms. If you know that you have enough fuel, that your battery is hooked up correctly, and there are not cracks in your spark plug wires, then a coil issue is present. Again, read up on safe options for your motorcycle before attempting. Motorcycle CDI Ignition System Parts and Functions Amrie Muchta. The trigger tells the box to fire, the box determines when to fire which coil with the capacitors, and zap goes the spark plug, ad infinitum. Two-Stroke Motorcycle Troubleshooting Guide. So the CDI is suited to an application where the insufficient dwell time is available. The bike struggles to rev any higher than about 4,000 rpms. Conversely, plenty of other riders swap factory points-and-condenser setups out for more modern ignition.). make sure pilot screws are adjusted right. Motorcyclists accepted occasional maintenance in exchange for rugged reliability, easy adjustment, and cheap cost of replacement. As a bike enthusiast I will like point out some facts that most of the bikers in our country are aware of, the Common Motorcycle Problems And Solutions of the problems. Please, How to remove and install a motorcycle battery. The CDI system uses the discharged voltage from the capacitor to induce an ignition coil. Bad Stator Fix--Don't Buy a New Stator for Your Engine! I have had the tci on my Virago repaired twice, replacement of a thermo fuse and transistors. Symptoms of a bad ground can range from a completely dead bike to electrical components working intermittently. Jetav8r.com photo. they have different setting for diferent years and carb types. So you’ve got a spark problem on your CDI-equipped motorcycle. An eBay special may have the same issue as yours, and a new replacement may not be returnable once installed. I've tried both with good results. If you're not, you're wondering what a CDI does... because you suspect yours doesn't. Suvro Sen April 11, 2013. to earn ZillaCash on your next purchase with us. Ground Wires. Orders $39.99 or more ship free within the contiguous U.S. Return any unused item within 90 days for a full refund. Thousands of miles of bouncing down the road can take its toll. Sometimes, a bad CDI does not cause sparks at all. The problem may get worse as the bike warms up. Borrow a cdi from another bike, plug it to your bike, If there is change is performance, then your cdi is bad. Hi all, I have an 82 Suzuki GS750T, and haven't gotten it running well yet. In my experience, it is rarely the CDI that is causing the problem they are pretty reliable. The box itself is packed with electronics, and delicate components inside can fall victim to vibration and moisture over time. The CDI goes bad because of different reasons. How to Check a Motorcycle Ignition Coil in 4 Steps When the new ignition coil is installed then the testing of the coil is really very necessary. It might not even hold low revs at all. It plays the role of storing electrical charge and increasing the spark power on the spark plug. Hello all, this is my 1 st article in BikeBD & I can’t help but admit that I am privileged to be given a chance to share my views & opinions here. But that doesn't mean they stay problem-free. Again, when a CDI box is about to go bad, it can lead to misfires, issues with starting, rough running or even stall the motor. Springs, weights, cam lobes, and other simple machines worked together to deliver spark at the right time, even as revs rose. $5 for every $100 you spend on eligible items and brands. One of the primary causes of failure is heat. I heard of some people fixing this problem by taking the CDI apart and replacing or soldering the fault. Finally, never underestimate the implication of that popular saying: ‘procrastination is the thief of time.’ Delay is dangerous. The ignition advance, once mechanically limited to a curve, could be tuned to squiggle any way you liked all the way to redline (read Lemmy's timing article if you'd like more on this). Eventually, your switch wears out. Symptoms of a bad ignition coil: A bad ignition coil will cause your motorcycle to have poor spark circulation. Here's a CDI box in a dirt bike. Quality Parts for Scooters, Go Karts, ATV's, Dirt Bikes. Changing a motorcycle clutch is something that should be carried out whenever you notice the slightest sign of wear. Increased power, better efficiency, less maintenance, and fewer moving parts earned CDI, and systems like it, a good reputation. It’s important to note what kind of engine you are working on. Different things require different power requirements from the battery. The major advantage of CDI is that the capacitor can be fully charged in a very short time (typically 1ms). Since the stator is what creates the electricity needed for the engine to create a spark and run. Black box, brain box, pulse pack, igniter box, CDI module, power pack, whatever you want to call it: if your motorcycle is newer than 1980, it probably has a black rectangle spouting wires under the seat that makes the magic happen. Its short spark time is also limited. Electronics gave manufacturers new control over their engines. How it works: Sign in ... CDI unit faulty. Since last time we spoke (+- 3 days ago) misfireing got worse and now when the bike is in 4000 rpm at any gear it just looses power. However, check engine light coming up can be caused or linked to other issues around the engine system. 11/06/2019. These two types work differently. If you’d like to know more about black boxes, the engineering behind them, and troubleshooting for your specific motorcycle, there are endless resources online to check out. Redeem Once the motorcycle has started, if the choke needs to be on slightly, the primary jet is either partially or completely blocked. Do your research before buying one. Heat can also damage or destroy a black box. Sometimes, a bad CDI does not cause sparks at all. The CDI box, however, does not give enough ignition efficiency because its spark duration is short. Generally, you can check motorcycle alternator stators while they're installed on the bike, using a quality multimeter. So you’ve got a spark problem on your CDI-equipped motorcycle. In addition to dischargin’ those capacitors, the box may also influence your rev limit, timing advance, and other variables related to spark, but that’s it. There is a wide range of possible reasons your motorcycle’s regulator rectifier could fail. Hey all, So i have a 1980 Suzuki GN400 and ive been working on getting it all ready for the street. 1. Motorcycle Troubleshooting Guide. It will run good for about 10 or 15 minutes, but once it warms up, it won't idle properly, will start struggling and die. It also directs the spark plugs on how to perform especially when they have to fire. One advantages of the CDI is that they are not sensitive to shunt resistance. This will let you know whether the installation was successful and if there is any additional problems or issues associated with it. Bike Bandit price for this CDI is now up to $232 so I wanted to be certain that this was the problem before ordering. CDI's complexity is in its circuitry, but its ancestors relied on clever mechanical systems to fire the coils. See our I would suggest checking all the basic items. CDI system is one type of ignition system that is widely applied to motorcycles. Every scooter owner or lover should know that CDI models are either AC or DC. The best solution when troubleshooting black boxes is to replace a suspicious one with a known good part after checking the other possibilities first. it would foul plugs. Signs & Symptoms Of A Bad Stator. It is designed as a general guide to assist in troubleshooting some of the. Finally, if you see the Magic Smoke come out, time for a new one. Get your ignition coil symptoms resolved as soon as they show up. Symptoms could include misfiring, dead cylinders, backfiring, bizarre tach behavior, and countless other things related to how your engine's running. Whenever you overwork it, it will not serve you for long. hey all i got a 99 ktm 200mxc two stroke that just had a stator failure, so i replaced it today when i got my new electrosport stator. i bought my bike running rich way rich like 20-25 miles. On an electrical engineering level, it's different from CDI, but the troubleshooting process is the same. Earn Could it be your black box? We have updated our Privacy Policy. Common Causes of Failure. While this Motorcycle Troubleshooting Guide is not a complete guide of every possible cause for each problem listed, it will help assist mechanics in troubleshooting some of the most common difficulties they will face. What sets them apart is their ability to release all that energy near instantaneously, which is ideal for an ignition circuit. I did some research and found some other guys with the same symptoms and replacing the CDI unit fixed the problem. Mostly concerning CDI boxes and ignition coils... for more technical information feel free to message me, I'll send you some good info Knowing how the CDI works will help you take better care of it by looking out for any symptoms of its damage or when it needs maintenance. Be careful when buying replacements. The CDI is not easy to diagnose because the observable symptoms of a faulty CDI box can lead to different directions. more common problems encountered. Black box ignitions tend to fail all at once, unlike the gradual decrease in performance you’d expect from a points-ignition motorcycle. We owe countless miles to these creations. A bike with CDI ignition may have a 2 part stator where most of the windings generate power to the battery via the Rec/reg and have another part, say two coils that power the ignition Sometimes it may be just the generating coils that fail, sometimes the CDI source coils. Loose wire connector. Some of them go bad because they are old, others experience a wiring short while others go bad because of a faulty charging system. All purchases Now Have 90 Day Returns! Plug you cdi in another bike. If you know your bike, pinning down the culprit is pretty quick and easy. Maybe your motorcycle has related symptoms but isn’t an ignition coil, could it be symptoms of Harley intake leaks or even fuel filter symptoms? 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