Proper point gap and ignition timing if applicable. Symptoms: Brown to greyish-tan colour and slight electrode wear. Whether I ride it for a short time or a long time, it doesn’t matter, it still becomes black. was established in 1961 as a state owned company. What are the signs of bad motorcycle spark plugs? Symptoms of running lean are overheating, bogging or loss of power, and delay of returning to idle from higher RPM’s. A light tan color is perfect. Motorcycle racing //TekniWiki; Spark Plugs . Broken electrodes. k This is often caused by over advanced ignition, timing, poor engine cooling system efficiency (scale, stoppages, low level), a very lean air/fuel mixture, or a leaking intake manifold. Delighted with the excellent products and the very good delivery time, many thanks. 13/11/2012, Customer services : +44 (0) 1477 532 317 (9-5 Mon-Fri). Reading spark plugs is an easy way to determine how an engine is running. I received my order yesterday. This plug eventually fouled and the bike would not start. Carbon fouled. Spark plug is passive component with 3 basic functions. I adjusted the idle screw, but after running the bike again, the plug … White or light gray muffler end pipes. A: The heat range of a motorbike spark plug refers the speed at which it can transfer heat, starting from the firing tip, and into the cooling system. The plug wire runs from the ignition coil to the plug cap. A lean spark plug will have little to no color on the insulator tip. Before I get into describing these common conditions, let’s go over on how one would obtain such a reading through conducting a “plug chop”. Use a spark plug wrench with an extender. Spark plugs usually fall into the first category, and that’s what this article is going to discuss: Using spark plug diagnosis to look for possible issues with your engine. Correct heat range for engine and operating conditions. Arafat Islam February 27, 2019. The Green Spark Plug Company Fault Diagnosis … The image below shows a plug off a motorcycle that was running pig rich. It have to: 1) stay cool enough to prevent pre-ignition 2) stay hot enough to burn off combustion deposits 3) provide spark to ignite A/F mixture. Put all the plugs back in the engine and connect up all the plug caps to the plugs. Electrodes look glazed; core nose very white; few deposits. Zhuzhou Torch Spark Plug Co.,Ltd. If it is, light grey is acceptable. Bluing (on chrome systems) of the exhaust header down-pipes. The majority of spark plug creators suggest that the heat range should be between 500-850 degrees Celsius. A: If this is the first time you’ve fouled a set of plugs, I’d change to projected tip spark plugs of the same heat range and try again. Routine checks on a coil are … Save my name, email, and website in this browser for the next time I comment. Typical symptoms of a lean mixture are: Backfiring as the throttle is closed (primarily during coast-downs) Lurching acceleration. Not far enough to collide with the valves or piston, but out in the fire a little more than a regular plug. Simply put, the motorcycle should be in great running condition. Burned. 1x Denso Standard Spark Plugs U24ESR-N U24ESRN 067800-6820 0677005380 4126, 1x NGK Copper Core Spark Plug CR9EKPA (7785), 1x Denso Standard Spark Plugs K16HPR-U11 K16HPRU11 067700-3020 0677003020 6076. Motorcycle Spark Plug Types & Features. Check the air cleaner and air box. Examples: 2-ground electrode plug, small ground electrode plug (taper cut), racing plug, surface discharge plug, etc. You can get a high-quality spark plug from a … If the old spark plugs are real clean you can use them, otherwise put in new ones. The spark plug keeps fouling. $1-$20: Expect to find either copper- or nickel-tipped spark plugs within this price range. Spark plug construction. To read a spark plug and assess engine troubles, you first have to remove it. If you are having a no-spark problem, a good place to start after ruling out shorts, grounds, switches and spark plugs, is the ignition coil, spark plug caps and wires. Your email address will not be published. Copyright © 2020 How-To Motorcycle Repair. This is for electronic ignition systems, for points bikes see my video on restoring points Learn how to read a spark plug so you can know how your vehicle is performing, foresee potential problems and take care of them early, and have the knowledge of when to change your plugs for best performance. So riderz, I think this Motorcycle Spark Plugs & Some Maintenance Tip is enough to enhance your biking general knowledge about motorcycle spark plugs and related issues. So the spark plug plays a vital role accordingly it influences the engine performance. Oil deposits. Spark Plug Inspection • Two indications and their possible root causes include the following: 1. Valve lash must be within specification for even compression. Carbon fouling. Tel:+86-731-85155584 Normal. Once pulled over, all plugs are removed and the spark plug color is inspected. Spark plugs are one of the most misunderstood components of an engine. Q: I have a question about my Yamaha XT500. If you are experiencing engine problems, taking a look at your spark plugs is a good place to start. Numerous questions have surfaced over the years, leaving many people confused. Like my articles and How-To videos? You can also look for physical signs on the spark plugs themselves which may include burn marks, broken tips, rust, and corrosion. Ok, we now have spark. Wet. A clean, white insulator firing tip and/or excessive electrode erosion indicates this spark plug condition. The ignition coil on a motorcycle serves to step up the relatively low battery voltage to the high voltage needed to fire a spark plug. Recommendations: When new spark plugs are installed, replace with plugs of the same heat range. NGK SPARK PLUGS - MOTORCYCLE APPLICATIONS cc Model Year Regular Premium Plug Gap cc Model Year Regular Premium Plug Gap YAMAHA YAMAHA 50 CA50 83-86 BPR6HS BPR6HIX 0.028 50 CE50 86-87 BPR6HS-10 --- 0.039 50 CG50 88-90 BPR7HS BPR7HIX 0.028 50 CV50 1984 BPR6HS BPR6HIX 0.028 50 CW50 Scooter- Vino 98-01 BR8HS BR8HIX 0.024 In order to fix the too rich setting, we need to increase the amount of air in the mixture, OR decrease the amount of petrol added to the mix. Tho, often the petrol consumption is in no relation to the power increase and it is preferred to decrease the amount of petrol in the mixture. Lean spark plug color. Motorcycle Spark Plugs. So to prevent you from failing Spark Plug reading here is a multitude of counsellors in picture form. Increasing the amount of air is usually an easy thing as we can simply apply a racing air filter, or modifiy the stock air box to allow for a better air flow. How-To: Size Your Pilot Jet, Pilot Screw Explained, 8 MUST Have Modifications – Harbor Freight Blast Cabinet, How-To: Prevent flash rust on metal parts, How-To: WOOD DIY Vapor Blaster Plans 42×30, How-To: MRCOOL DIY Mini Split Installation, How-To: Honda CB750 Carburetor Rebuild 1969-1976. was established in 1961 as a state owned company. (1) Spark plug selection ・ As a countermeasure to increased stress on the ground electrode, changing to a spark plug with a small ground electrode is an effective way to handle the problem from the plug side. However, the black media used in such machines can sometimes remain in the spark plug and may well find their way into the engine. A plug chop is referred to taking a motorcycle out on the road at certain speed and RPM for a few minutes, without changing the throttle position. Rectify before piston rings break or valve faces burn. Now, I’m going to cover the 3 most common conditions, lean, normal, and rich. Worn electrodes. Note that sometimes, depending on the fuel and additives, the color may be grey instead. Most motorcycle owners apply carburettor cleaner to their spark plug head, then remove dirt and debris with a wire brush. Take a second to support Matthew on Patreon! Whether it is for cars, motorcycles, lorries, motorboats, tractors, stationary engines, boats, agriculture equipment or even lawn mowers the Green Spark Plug Co. has vast stocks of period plugs and/or their modern equivalents. Spark plug loose Cylinder head not sufficiently tightened down No valve clearance Cylinder, piston worn Piston ring bad (worn, weak, broken, or sticking) Piston ring/land clearance excessive Cylinder head warped Cylinder head gasket damaged Valve spring broken or weak Tel:+86-731-85155584 The signs of bad motorcycle spark plugs include your motorcycle misfiring, backfiring, or frequently having a flooded engine. As such, they are generally not a repairable item. Normal spark plug color should show a light tan on the insulator tip. Coils are generally a sealed, water-tight component. I took the carburetor apart and cleaned the jets. You must have JavaScript enabled in your browser to utilize the functionality of this website. Dark brown or black color indicates a rich condition, or excess fuel. I got all this from a Free hand out I recieved from NGK Spark Plugs back in 1977. Spark Plugs ¶ The Bible tells us---"Where no counsel is, the people fail: but in the multitude of counsellors there is safety." ... That spare spark plug will always cost less and take much less time than waiting for and paying for road service. Proverbs 11:14. Check plug temperature value, ignition timing, fuel octane rating (might be too low) and mixture setting (too lean). Hello, I received your package on saturday in good order. Correct heat range for engine and operating conditions. Symptoms: Brown to greyish-tan colour and slight electrode wear. When reading spark plugs, you will likely find one of the following conditions: Normal. Fouled spark plug. Fantastic support, as always, and the website is very good, easy to use and friendly interface, Thank you, Roy Langstaff. This i… Look at the air cleaner. Plug is overheating. Others purchase a special sand blaster unit to clean the connectors. This plug eventually fouled and the bike would not start. No color, or white, indicates a lean condition, or lack of fuel. You can use the burn color of your plugs and reference the plug color charts below to determine if your engine is running rich or lean. White or light gray spark plugs. JavaScript seem to be disabled in your browser. You don’t have to take the whole engine apart to find your spark plugs, making the inspection and the use of them for diagnosing many car troubles simple. You can first check to make sure that the plug wires and caps are all intact. Once you get the socket over the spark plug, place your hand over the head of the wrench, grasping the head firmly and pull the handle, hitting it … Normal. Projected tip plugs have the same thread depth as regular plugs, but the center electrode projects farther out into the combustion chamber. You can see the light brown color begin to appear on the left side of the insulator in the image below. Reading a spark plug consists of examining and evaluating the condition and color of the tip of the plug. Liked it? Recommendations: When new spark plugs are installed, replace with plugs of the same heat range. Sand blaster. The image below shows a plug off a motorcycle that was running pig rich. With help from the spark plug experts at NGK, we’ll teach you how to diagnose minor tuning issues or potentially major engine problems by examining your spark plugs.Check out the images below, courtesy of NGK Spark Plugs, and get ready to do a little light reading the next time you pull your spark plugs.. Normal. Motorcycle Spark Plug Pricing. Zhuzhou Torch Spark Plug Co.,Ltd. Best Motorcycle Spark Plug FAQ: Q: What is the heat range of a spark plug? Once the few minutes are up, the rider quickly pulls in the clutch, shuts the engine off, and coasts to a stop. Symptoms of running lean are overheating, bogging or loss of power, and delay of returning to idle from higher RPM’s. Your email address will not be published. Requiring excessive amounts of choke to run/start. Rich spark plug color. Your motorcycle’s spark plugs can be very useful to diagnose running conditions in your engine. Enter your name and email to get notified when new content becomes available. Overheated plug . And hope this will help you to understand your bike more and make you capable to solve some regular issues related with spark plug. A lean spark plug will have little to no color on the insulator tip. The Green Spark Plug Co. specialises in spark plugs & accessories for veteran, vintage and classic engines. Good morning. Make sure mice or bugs haven't gotten in there and built a nest, plugging up everything. Required fields are marked *. Motorcycle Spark Plug is an important part of the engine that initiates the ignition and combustion process continues. A symptom of running rich is black smoke exiting from the exhaust. 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