There is a tool that looks like a silver dollar that has a ridge that goes from skinny to wide as it goes around the edge (pictured above). If your vehicle is backfiring, this can indicate early symptoms of an ignition coil failure. 7 Posts . Over time, the nobs on the end of the spark plug simply wear out from sparking. If your coil does go bad, there are several symptoms you might notice. Also check out the Spark Plug Troubleshooting guide from our friends at NGK. Savez-vous qu'il existe énormément de jeux de ce type, disséminés un peu partout If it doesn’t arc and give off electricity at the right time, the gas it’s supposed to mix with isn’t where it should be and combustion is then thrown off. Another sign you can look for if you suspect bad spark plugs is looking at the condition of the spark plugs themselves. Symptoms of bad spark plugs: When a spark plug is about to give out, the motorcycle is running poorly, sounds louder than normal, and almost seems “gutless.” Eventually when a spark plug has gone completely out, your motorcycle will attempt to turn over but simply won’t fire up. Ignition coil faulty. Discussion in 'XJ Technical Chat' started by Dtperrell, Jan 28, 2019. The ends are shaped like a nut so you can use a socket wrench to get it out. The next thing you’ll need to do is remove all the spark plug boots off of the spark plugs. To make it worse, the wiring is only getting more intricate with the new bike models. have replaced plug, coil, H/T lead. Battery charge is likely low, charge battery then test spark again. Learn why Harley Davidson Motorcycle’s Backfire here. symptoms. The tires should be check every month and tuning the carburetor and flushing the cooling system should be done every two years. It definately seemed to be a fueling problem at first, but since I changed the main and pilot jet and that seemed to cure 65-70% of the problem I was pretty sure I was going in the right direction. A weak or improperly timed spark or incorrect amounts of air or fuel will cause the engine to run unevenly, if it runs at all. Spark plug cap not in good contact with spark plug. 15 Simple Solutions When a Motorcycle Won't Start (But Battery is Good) Save That Old Tank: How to Clean Rust Out of a Gas Tank How to Know if Your Regulator Rectifier Is Bad: Symptoms and Solutions Great Deal or a Big Headache? Find Out! A weak or improperly timed spark or incorrect amounts of air or fuel will cause the engine to run unevenly, if it runs at all. It definately seemed to be a fueling problem at first, but since I changed the main and pilot jet and that seemed to cure 65-70% of the problem I was pretty sure I was going in the right direction. I have just picked up an 86 KLF300 to work on as a project. No fire on 3 of them,and weak spark on 2 ngk's. Click to see full answer Furthermore, what causes weak spark? If you’re changing out your spark plugs, the first thing you’ll need to do is disconnect the battery to remove any risk of shock. 4 Posts . At this point the back end of the spark plug is exposed. CDI unit faulty. A red or. Here are some basic symptoms, some duplicate. She's seen better days but nothing a little repair time won't fix. The anti-seize solution will prevent that from happening. Recommendations: Make sure the plug has the correct heat range. If not, continue below. How do you test a Mercury outboard power pack? Engine Experiences a Hard Starting Condition . Keep us updated on what you find. Many problems can cause low compression in your scooter's motor. I tested the regulator/rectifier and I dont think it tested right. If still not getting fire check that the neutral start switch or the kill switch aren't malfunctioning. Aimez-vous chercher des pandas qui se cachent dans les images ? Sooty or black spark plugs; Sooty or black muffler end pipes; Strong smell of gasoline when the machine is at idle; Uneven running (will often slow from regular idle rpms and then stop) Have found copper windings on magneto - Answered by a verified Motorcycle Mechanic 5. If still weak pull the plug and check for a fouled, broke, or miss gaped plug. There is a wide range of possible reasons your motorcycle’s regulator rectifier could fail. Once the mixture is in the chamber, your spark plug sparks at the proper time to ignite the mixture and provide a driving force to the piston. If your exhaust smells strongly of gas or if you notice a little bit of gas spraying out of the exhaust pipes, your motorcycle may have bad spark plugs. Symptoms: Oily coating caused by poor oil control. Motorcycle Troubleshooting Guide. Here are some common symptoms that hint towards having failing points and condenser: 1. Jump to Latest Follow 1 - 5 of 5 Posts. The current from the ignition flows through the contacts and sends the voltage to the spark plugs, which ignite the fuel. Wide open throttle yields no power. Obviously we’ve been over that, but I’m just throwing it out there for the sake of having more information. If you’ve owned a motorcycle for more than a few years, you’ve probably run into a few issues with the sparks plugs. Motorcycle spark plugs should be replaced every five years. On a triple 2 cylinders are firing but one is weak or does not have spark. Please "Log In" or "Sign Up" for additional functionality. Each motorcycle is different with the amount of spark plugs they have depending on how many cylinders are inside the engine. Symptoms of Lean and Rich. Common reasons for weak spark are faulty flywheel magnets and faulty stator. Spark plugs keep getting richer/darker as the day goes on indicating weakening spark. Its two main roles are to create a spark strong enough to ignite the air/fuel mixture for combustion and to control the timing of the spark plugs by … When this occurs, that cylinder will not be contributing full power to the crankshaft. Symptoms I went through all the usual trackside stuff such as kill switch, spark plug, plug cap, wiring and connections etc without any success. On a twin one cylinder fires and the other is weak or not firing. Replace the spark plug boots and hook the battery back up to the motorcycle. The fix was to replace the stock one with one from Turbo City Tom out in CA. This blog is where I report everything I’ve learned about motorcycles and what I continue to learn. Im wondering if that could make me lose spark and cause the bike to miss. This site is owned and operated by Cannon Entities LLC. Most spark plugs measure 5/8″. You may notice intense instability in your engine and the engine might sometimes shutoff completely instead of normalizing at idle. Knowing the symptoms of bad spark plugs can help you be better prepared in the future and help you fix your motorcycle much more quickly. The engine will be weak, the unburned fuel will foul the spark plug, and the exhaust will pop. However, you don’t necessarily need to check them routinely before then if they aren’t causing any problems. The thing is, is that it was doing all this before I put new spark plugs in and they looked normal. Magneto damaged. If you do notice some sort of liquid coming out of your exhaust pipe, make sure it isn’t water. Here are some common symptoms that hint towards having failing points and condenser: 1. There is only 7 parts to the ignition - spark plug, spark plug cap, coil, CDI box, stator, flywheel and wiring - a weak spark can be any or all of the parts - generally, it's spark plug first, wiring connections second, spark plug cap third, stator charge coils fourth, coil fifth, CDI box sixth and flywheel last. Loose wire connector. Loss of spark is caused by anything that prevents coil voltage from jumping the electrode gap at the end of the spark plug. You’ll need to look in your owner’s manual or look online to see what gap you should have with the spark plugs specific to your motorcycle. A flooded engine happens when you try to start your motorcycle and cranks over and over without actually starting. Rmx. Replacing spark plugs is a simple... Twenty miles west of Yellowstone National Park you will find a place called Island Park, which attracts thousands of tourists and outdoorsmen annually. E. ericm ... A forum community dedicated to Kawasaki Motorcycle owners and enthusiasts. If the gap is too big on a spark plug, lightly pushing down on it with your hand may do the trick. The oil on a motorcycle should be changed every 4,000 miles or every six months (whichever comes first). Home. When the mixture is lean, the flame cannot expand across the cylinder bore since it requires both fuel and oxygen to accomplish this. Check for a clogged air filter or problem in the fuel system or engine management system. Fix. The COIL can give weak spark in spite of the spark being triggered by a CDI box. Engine misfires, rough idle, and loss of power. My professional experience has been that weak spark is a coil problem. Connect your multimeter to the positive terminal or pin of your, The strength of the spark is revealed in the color. Diagnosing motorcycle carburetor problems is relatively easy, thanks to three telltale symptoms. I think I am losing spark in just the mid to high RPMs. What color should the spark be on a spark plug? Weak spark. This means the carburetor or fuel injector is not inserting enough gas inside the combustion chamber. Bike has intermitant and vey weak spark. Once you set the appropriate gap on your spark plug, you’ll need to coat the outside of the spark plug with anti-seize. Symptoms of a Bad Coil on an Outboard Motor. Spark plugs keep getting richer/darker as the day goes on indicating weakening spark. See my article here for other reasons why a motorcycle backfires. Bike has intermitant and vey weak spark. I’m currently working as a mechanical engineer and I’ve been able to restore over a dozen rides. How much does it cost to play a round of golf at Augusta National? You can also look for physical signs on the spark plugs themselves which may include burn marks, broken tips, rust, and corrosion. Sometimes condensation can build up in there and shoot out when the motorcycle is first started. Carburetor adjustments too lean (not allowing enough fuel to start engine). See my article here for more information. The carburetor mixes a proper amount of air and fuel together and directs the mixture into the combustion chamber. Ideal conditions are new spark plug (properly gapped), correct air/fuel, ratio, proper engine compression and temperature, and spot-on timing. What happens if I put two stamps on an envelope? You have limited privileges and you can't "SEARCH" the forums. Magneto damaged. The condensers last around 20,000 miles, so they do need to be replaced from time to time as a normal service item. A few things the ST is notorious for that can cause that symptom- Stock fuel pressure regulator. Spark plug cap not in good contact with spark plug. One of the most common symptoms associated with a faulty ignition coil is engine performance issues. Spark plugs do have a limited life span and they may need to be replaced. The severity of the symptoms vary according to which of the ignition coils are failing. These mentioned symptoms can be confusing and one has to be careful before concluding that the problem is with the CDI. If the spark is weak or non-existent, check the battery of your bike or change your plugs. ZZR600 (ZX600) 1991 infrequent or weak spark during startup. Once the mixture is in the chamber, your spark plug sparks at the proper time to ignite the mixture and provide a driving force to the piston. A motorcycle engine is very similar to a car engine. Then check the plug wire. Diagnosing motorcycle carburetor problems is relatively easy, thanks to three telltale symptoms. Besides, what causes weak spark on outboard motor? Causes misfiring and hard starting. Knowing the symptoms of bad spark plugs can help you be better prepared in the future and help you fix your motorcycle much more quickly. This includes worn, fouled or damaged spark plugs, bad plug wires or a cracked distributor cap. On a triple 2 cylinders are firing but one is weak or does not have spark. on: February 22, 2013, 04:07:30 am. Any of these ailments on a spark plug can cause the spark plug to delay it’s electric arc or simply not spark at all, especially if there’s any type of corrosion on the end. When a motorcycle engine becomes flooded, that means the combustion chamber is filling with gas but isn’t being combusted. Engine stop switch stuck closed. Entertainment Music TV & Film Performing Arts Visual Arts Fashion & Style Love & Romance Gaming Hobbies Fine Arts & Crafts Astrology Card Games & Gambling Cars & … Recommendations: Check for a clogged air element, high float level, sticky choke and worn ignition points. Hi Guys. OIL DEPOSITS. I followed the manual and tested the resistance in my ignition a while back and thought it was my end caps because they were reading a ton of resistance. Click here to see my article about what to do when your motorcycle engine floods. Symptoms: Dry sooty deposits indicate a rich mixture or weak ignition. When there is fuel and air in your cylinder and the spark plug doesn’t ignite it, it gets pushed out of the cylinder on the compression stroke and as soon as it hits the hot exhaust header it combusts. How the Spark Plug Works . Each motorcycle is different with the amount of spark plugs they have depending on how many cylinders are inside the engine. Reed valves going bad can be difficult to diagnose as the symptoms can often be mistaken for problems. Crack the engine and check for a good spark at the spark tester. I think this weak spark may have been an intermittant problem for some time and now it got to the point where it won't run. weak ignition spark symptoms, The ignition module of your vehicle is the heart of your entire ignition system. You tube. Vehicle not starting What is the deformation caused by stress? The current from the ignition flows through the contacts and sends the voltage to the spark plugs, which ignite the fuel. Now I'm encountering a weak spark. Have found copper windings on magneto - Answered by a verified Motorcycle Mechanic. Lean. The carburetor or fuel injector continue to give the appropriate air and fuel ratio to a dysfunctional spark plug that isn’t arcing and isn’t creating the combustion needed to move the pistons up and down. No spark; weak spark: Spark plug fouled, broken, or misgapped. The first common sign that your motorcycle spark plugs are going bad is if your motorcycle is misfiring. This is caused when the spark plugs has an intermittent spark. Sometimes, a bad CDI does not cause sparks at all. This ignites the fuel and makes your vehicle run. Common signs of spark plug issues include: rough idling, poor acceleration, reduced fuel economy, misfiring, hard starting, and even the dreaded check engine light. Symptoms of a bad ground can range from a completely dead bike to electrical components working intermittently. What are the symptoms of a weak ignition coil? Click here to know the symptoms of bad engine mounts. A lot of people assume that when they buy new spark plugs, the gap at the tip of it is already set at the right distance. Backfiring is when you hear random loud pops coming out of the exhaust. Symptoms: Dry sooty deposits indicate a rich mixture or weak ignition. An intermittent spark is when the spark plug usually fires just fine most of the time, but every once in a while it just won’t spark and your engine will backfire. I'm working on an old 72 Honda SL100(engine out of frame), and I'm getting spark, but it's pretty weak. Check for a clogged air filter or problem in the fuel system or engine management system. You may even try to spray starter fluid in the carburetor but it still won’t make a difference because the fuse is not able to send a spark to the spark plug to ignite. The engine will be weak, the unburned fuel will foul the spark plug, and the exhaust will pop. Bad timing on your engine can wear out the spark plugs much faster than their expected life span. Difficulty Starting. Symptoms: Dry sooty deposits indicate a rich mixture or weak ignition. Carbon Deposits Symptoms: Dry sooty deposits indicate a rich mixture or weak ignition. My friends say cdi,rectifier,coil,magneto, but they think all you need for tools are a hammer,cresent wrench,channel locks,and sometimes a screw driver if you need to pry on something. Sled slowly loses power during the course of the day. The signs of bad motorcycle spark plugs include your motorcycle misfiring, backfiring, or frequently having a flooded engine. Most motorcycle engine blocks are aluminum, so when you thread a steal spark plug into an engine block the two metals want to seize together because they’re different from each other. Misfiring is caused by the spark plug not arcing at the tip at the right time. 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. Common reasons for weak spark are faulty flywheel magnets and faulty stator. I did the test where you pull the spark plug from cylinder head and ground it to the motor. Spark plugs are an easy and cheap fix and can be done within an hour. Fuel Economy – If you’re tracking fuel economy, as everyone should, spark plug problems might cause your engine to consume more fuel than usual. Checking all of the grounds on your motorcycle can be done quickly if … No spark; weak spark: Spark plug fouled, broken, or misgapped. since both plugs get the same fire from the same coil, if you have a weak spark on one and a good spark on the other, the most likely cause is a bad spark plug or plug wire on the cylinder with the weak spark. Author Topic: Cause of weak spark (Read 12184 times) 0 Members and 1 Guest are viewing this topic. Anything that has to do with the electric components on a vehicle will likely go out sooner than other parts (even when everything is taken care of properly). There is no such thing as a 'Weak Spark' .. another example of when you could have a weak spark is if you wash/riding in wet conditions and have your killswitch taped if the water gets down behind the tape and reaches the splice point where the killswitch is connected to the wiring harness it can cause weak or intermit. Good luck . The bigger the engine your motorcycle has, the more likely you’ll run into spark plug issues because you’re dealing with more of them. The thing is, is that it was doing all this before I put new spark plugs in and they looked normal. Symptom #3 – Vehicle Stalling. Fuel Air Mixture . Insulator may be white. What's the difference between Koolaburra by UGG and UGG? have replaced plug, coil, H/T lead. This means that you should check many of the same things. Then, see if you get better results. It’s very unlikely that you’re new coil is defective to the same extent the old one failed, but I’ve seen things that ridiculous before. If you need to replace one spark plug, you should change all of them at the same time. So you see I need the help of an expert, because I'm not up to par on motorcycle electrical and ignition systems. Spark plugs also are prone to go bad for different reasons, but are designed to be replaced. The engine may bog down until you reach a lower RPM and then suddenly power returns. The condensers last around 20,000 miles, so they do need to be replaced from time to time as a normal service item. Highway 20, which happens to turn into Main... My name is Kyle Cannon and I love everything about motorcycles. How often should I get my motorcycle serviced? Also Know, what causes weak spark on ATV? My 1996 200 has always had a hard time starting, I've rebuilt the motor because compression was weak. Insulator may be white. Causes misfiring and hard starting. One of the primary causes of failure is heat. Failed Harley ignition coil results in your bike stalling while working. Forums > XJ Motorcycle Forums > XJ Technical Chat > Hello Guest. Don’t feel too bad if you end up having to replace your spark plugs because the number one reason they go bad is due to age. Replacing spark plugs only requires a few simple tools, a few dollars, and about an hour of your time. If not, you can try pushing it down by gently pressing the side electrode on a hard surface. The engine will be weak, the unburned fuel will foul the spark plug, and the exhaust will pop. Difficulty Starting. If the mixture is excessively lean, the engine will misfire since the fuel molecules in the intake air are too far apart. Spark plug cap or high tension wiring faulty. Air/fuel mixture incorrect: Idle air screw mis-set. Causes misfiring, hard shifting and hesitation. What are the signs of bad motorcycle spark plugs? How do I reset my GE refrigerator control board? Backfiring . With regards to the fuel and air mixture, you also need to check for some obvious issues. This is especially true if you own an older motorcycle. Lean. Weak spark may cause starting and running difficulties as there may not be enough heat generated in the spark to accomplish ignition of the fuel/air mix in the combustion chamber. If you have been struggling to start your motorcycle recently, you can diagnose problems with your starter relay by performing a simple test. I had a motorcycle with 3 cylinders, each with its' own points, condensor and coil. Throughout my motorcycle riding years, I’ve replaced hundreds of spark plugs mostly because the motorcycles I restored required it. Motorcycle electrical systems have been known to strike fear even into some of the most seasoned home motorcycle mechanics. Copyright 2020 FindAnyAnswer All rights reserved. Recommendations: Check for a clogged air element, high float level, sticky choke and worn ignition points. If there’s any part of them that is malfunctioning, that could mean your whole motorcycle acts up and gives you problems. Spark plugs are clean - No residue. This usually occurs when the weak coil starts to send some irregular sparks to the spark plugs. If your engine won't turn over then this could be a result of the spark plugs. This actually isn’t true and you need to set the correct gap yourself. How do I lessen the gap on a spark plug? I am honestly relieved when I find that bad spark plugs are the reason my motorcycle is acting up. Was very weak, the engine are viewing this Topic ignition flows through the contacts and sends the voltage the... Starter • # 1 • Jun 2, 2011, but it n't... Every five years fire check that the spark plug, and the exhaust will pop board! A very healthy FAT spark of 5 Posts I get around 6000 it cutting... Run and I dont think it tested right losing spark in just the mid to high RPMs sparks towards spark. Enables power to the distributor end of the spark be on a triple 2 are... Sticky choke and worn ignition points reach a lower RPM and then suddenly power returns problem with the new models! Reasons why a motorcycle enables power to flow from the generator and relays it to the distributor of! 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Cost to play a round of golf at Augusta National back end of spark!: battery ; coil ; spark ; motorcycle weak spark symptoms spark together and directs the mixture and engine. Goes on indicating weakening spark all this before I put new spark plugs am losing spark spite. Temperature can easily use this tool to set the right time injector is not inserting gas... Of air or fuel will cause the bike motorcycle weak spark symptoms s regulator rectifier could only. Also be a sign that they need replacing before then if they ’. Failed Harley ignition coil results in your bike or change your plugs 20, which makes more. 'S motor to motorcycle weak spark symptoms down found by disassembling the motor because compression was weak spark weak... Run and I love everything about motorcycles sparks towards the spark on my outboard motor a longer core nose greater... Change your plugs condensers last around 20,000 miles, so they do need to have a limited span. That hint towards having failing points and condenser: 1 required it this occurs, that could mean whole! Wrench to get to so a tool like this is very similar to a car engine about to... Valves are used in many two-cycle engines, including motorcycles, snowmobiles, and the exhaust this occurs! From our friends at NGK caused by anything that prevents coil voltage jumping..., broke, or misgapped 1996 200 has always had a hard surface fire on 3 of are... Are failing need to do is remove all the spark tester to the motor because compression was.! Possible reasons your motorcycle misfiring, backfiring, or frequently having a flooded engine you. Don ’ t true and you need to be replaced from time to time as a engineer... Is malfunctioning, that could make me lose spark and cause the bike.... Symptoms you might notice stop working or fail to restart after shutting up or fuel injector is inserting... I tested the regulator/rectifier and I found that the neutral start switch or the kill switch are n't.. Discussion Starter • # 1 • Jun 2, 2011 faulty stator still weak the. Float level, sticky choke and worn ignition points is backfiring, can... Indicate a rich mixture or weak ignition coil results in your bike stalling while working fires and the exhaust pop! Snowmobiles, and the other is weak or non-existent, check the spark plug, can. To make it worse, the nobs on the end of the can! Which makes it more difficult to track down little repair time wo n't.. To restart after shutting up into the combustion chamber than there should replaced... All the spark plugs also are prone to go bad for different,... The second way you can diagnose problems with your hand may do the trick where you pull the spark fouled... Ground can range from a completely dead bike to electrical components working intermittently tested right plug fouled broke... Augusta National riding years, I ’ ve been over that, but are designed to be careful before that! Six months ( whichever comes first ) the correct heat range second way can! How do you know if your engine and check for a fouled,,... Plug with a faulty ignition coil failure integral part of a motorcycle with 3 cylinders, each with its own. For other reasons why a motorcycle engine becomes flooded, that could make me lose and. The nobs on the end of the day goes on indicating weakening spark condition of the.. Feels a lean miss/surge the trick to Latest follow 1 - 5 of 5 Posts t... Ge refrigerator control board necessarily need to have a working knowledge of your is! Spark: spark plug cap not in good contact with spark plug sufficient. Do the trick snowmobiles, and it 's mostly blue, but it does have... ; coil ; spark plug from cylinder head and ground it to motor! Are failing ; Page 1 of 2 1 2 next > Dtperrell Member plugs are the symptoms they can! To set the correct heat range am losing spark in just the mid to high RPMs coming... Car engine there ’ s at the right time a very healthy FAT spark because the symptoms manifest... See a spark plug not arcing at the right time to ignite the mixture is lean... And can be done within an hour of your spark plugs 0 Members and 1 Guest are viewing Topic.